Merge pull request 'feat(#370 Stage A): MCP save_page_version — агентские версии страниц' (#565) from feat/370-agent-save-version into develop

Reviewed-on: #565

NewDesign/CommentsPanel.tsx

@@ -0,0 +1,460 @@
+/**
+ * CommentsPanel — редизайн панели комментариев с фокусом на агентские правки.
+ * Mantine v7. Узкая колонка ~340–400px, светлая/тёмная темы.
+ *
+ * Реализованные решения (см. README.md):
+ *  - Дифф-первая карточка: цитата = старая строка диффа (без тройного дублирования)
+ *  - Группировка серии прогона под одной шапкой ("Корректор · 28 правок")
+ *  - Пакетное "Accept all" на фронте (по одной под капотом) с полоской прогресса
+ *  - Метки важности/категории парсятся клиентом из тегов "[Корректура][Существенно]"
+ *  - Фильтры по важности/категории
+ *  - Безопасный Dismiss через undo-тост (удаление откладывается на клиенте)
+ *  - Состояния: pending / applied / dismissed / conflict (потерян якорь)
+ *  - Крайние диффы: вставка (␣), удаление, одна буква, дефис→тире, длинный абзац
+ *  - Человеческий тред не деградирует (та же система, другое наполнение)
+ *  - Вкладки Open/Resolved сохранены
+ */
+import { useMemo, useState, useCallback, useRef } from 'react';
+import {
+  Box, Group, Stack, Text, Badge, Button, ActionIcon, Tabs, Progress,
+  Avatar, Tooltip, ScrollArea, useMantineColorScheme, useMantineTheme,
+} from '@mantine/core';
+import { notifications } from '@mantine/notifications';
+
+/* ─────────────────────────── Типы данных ─────────────────────────── */
+
+export type Severity = 'critical' | 'major' | 'minor';
+export type Category = string; // "Корректура" | "Факт" | "Стиль" | …
+
+/** Один сегмент интра-диффа: изменённый фрагмент подсвечивается. */
+export interface DiffSegment {
+  text: string;
+  changed: boolean;
+}
+
+/** Правка: сервер уже отдаёт посегментную разметку обеих строк. */
+export interface SuggestedEdit {
+  before: DiffSegment[]; // "было" (пустой массив ⇒ чистая вставка)
+  after: DiffSegment[];  // "стало" (пустой массив ⇒ чистое удаление)
+}
+
+export type CommentStatus = 'pending' | 'applied' | 'dismissed' | 'conflict';
+
+export interface Comment {
+  id: string;
+  runId?: string;          // id прогона агента — для группировки серии
+  authorName: string;      // "Корректор" | "Нарратор" | имя человека
+  authorKind: 'agent' | 'human';
+  triggeredBy?: string;    // кто запустил агента ("vvzvlad")
+  createdAtLabel: string;  // "15 ч", "2 дн" — форматируется вызывающим кодом
+  /** Сырой текст комментария от агента, метки в квадратных скобках. */
+  bodyRaw: string;
+  edit?: SuggestedEdit;    // есть ⇒ агентская правка; нет ⇒ обычный тред
+  status: CommentStatus;
+  replyCount?: number;
+  anchorLost?: boolean;    // сервер ответил конфликтом якоря
+}
+
+export interface CommentsPanelProps {
+  comments: Comment[];
+  /** Применить одну правку. Резолвит тред на сервере. */
+  onApply: (id: string) => Promise<void>;
+  /** Жёсткое удаление на сервере (для треда без ответов). Вызывается ПОСЛЕ окна undo. */
+  onDismiss: (id: string) => Promise<void>;
+  /** Резолв обычного треда. */
+  onResolve?: (id: string) => Promise<void>;
+  /** Клик по карточке/цитате — скролл документа к якорю и подсветка. */
+  onNavigateToAnchor: (id: string) => void;
+  onClose?: () => void;
+  /** Мс до фактического удаления после Dismiss (окно undo). По умолчанию 5000. */
+  dismissUndoMs?: number;
+}
+
+/* ───────────────────── Клиентский парсинг меток ───────────────────── */
+
+const SEVERITY_WORDS: Record<string, Severity> = {
+  'существенно': 'major', 'критично': 'critical', 'критическая': 'critical',
+  'незначительно': 'minor', 'мелко': 'minor', 'major': 'major',
+  'minor': 'minor', 'critical': 'critical',
+};
+
+interface ParsedBody {
+  category?: Category;
+  severity: Severity;
+  text: string; // тело без скобочных тегов
+}
+
+/** "[Корректура] [Существенно] Пробел…" → {category, severity, text}. */
+export function parseBody(raw: string): ParsedBody {
+  const tags: string[] = [];
+  const text = raw.replace(/\[([^\]]+)\]/g, (_, t) => { tags.push(t.trim()); return ''; }).trim();
+  let severity: Severity = 'minor';
+  let category: Category | undefined;
+  for (const t of tags) {
+    const sv = SEVERITY_WORDS[t.toLowerCase()];
+    if (sv) severity = sv; else if (!category) category = t;
+  }
+  return { category, severity, text };
+}
+
+const SEV_COLOR: Record<Severity, string> = {
+  critical: 'red', major: 'orange', minor: 'gray',
+};
+
+/* ──────────────────────────── Дифф ──────────────────────────── */
+
+/** Делает невидимые символы видимыми в подсветке (пробел, таб). */
+function visibleWhitespace(s: string): string {
+  return s.replace(/ /g, '␣').replace(/\t/g, '⇥');
+}
+
+function DiffLine({ segments, kind }: { segments: DiffSegment[]; kind: 'del' | 'ins' }) {
+  const theme = useMantineTheme();
+  const { colorScheme } = useMantineColorScheme();
+  const dark = colorScheme === 'dark';
+  const isDel = kind === 'del';
+  const sign = isDel ? '−' : '+';
+  const signColor = isDel ? theme.colors.red[dark ? 5 : 6] : theme.colors.green[dark ? 5 : 6];
+  const baseColor = isDel
+    ? (dark ? theme.colors.gray[5] : theme.colors.gray[6])
+    : (dark ? theme.colors.gray[1] : theme.colors.dark[9]);
+  const markBg = isDel
+    ? (dark ? 'rgba(224,49,49,.22)' : '#ffe3e3')
+    : (dark ? 'rgba(47,158,68,.22)' : '#d3f9d8');
+  const markFg = isDel
+    ? (dark ? theme.colors.red[3] : theme.colors.red[8])
+    : (dark ? theme.colors.green[3] : theme.colors.green[9]);
+
+  return (
+    <Group gap={7} wrap="nowrap" align="flex-start">
+      <Text ff="monospace" fw={600} fz={12} c={signColor} w={11} ta="center" style={{ flex: 'none', lineHeight: 1.5 }}>{sign}</Text>
+      <Text fz={13.5} c={baseColor} style={{ lineHeight: 1.45 }}>
+        {segments.map((seg, i) =>
+          seg.changed ? (
+            <Box key={i} component="mark" px={3} fw={600}
+              style={{ background: markBg, color: markFg, borderRadius: 3,
+                textDecoration: isDel ? 'line-through' : 'none' }}>
+              {visibleWhitespace(seg.text)}
+            </Box>
+          ) : (
+            <Box key={i} component="span" style={{ textDecoration: isDel ? 'line-through' : 'none' }}>{seg.text}</Box>
+          )
+        )}
+      </Text>
+    </Group>
+  );
+}
+
+function DiffBlock({ edit }: { edit: SuggestedEdit }) {
+  const pureInsert = edit.before.length === 0;
+  const pureDelete = edit.after.length === 0;
+  return (
+    <Stack gap={1}>
+      {!pureInsert && <DiffLine segments={edit.before} kind="del" />}
+      {!pureDelete && <DiffLine segments={edit.after} kind="ins" />}
+    </Stack>
+  );
+}
+
+/* ──────────────────────── Карточка правки ──────────────────────── */
+
+function EditCard({ c, onApply, onDismiss, onNavigateToAnchor, dismissUndoMs = 5000 }: {
+  c: Comment;
+  onApply: CommentsPanelProps['onApply'];
+  onDismiss: CommentsPanelProps['onDismiss'];
+  onNavigateToAnchor: CommentsPanelProps['onNavigateToAnchor'];
+  dismissUndoMs?: number;
+}) {
+  const parsed = useMemo(() => parseBody(c.bodyRaw), [c.bodyRaw]);
+  const [busy, setBusy] = useState(false);
+  const timer = useRef<number>();
+
+  const apply = useCallback(async () => {
+    setBusy(true);
+    try { await onApply(c.id); } finally { setBusy(false); }
+  }, [c.id, onApply]);
+
+  // Безопасный Dismiss: прячем сразу, удаляем на сервере после окна undo.
+  const dismiss = useCallback(() => {
+    let undone = false;
+    const nid = notifications.show({
+      message: 'Edit dismissed',
+      color: 'gray',
+      autoClose: dismissUndoMs,
+      withCloseButton: false,
+      // Кнопка "Вернуть" — см. README про кастомный рендер экшена.
+    });
+    timer.current = window.setTimeout(() => {
+      if (!undone) onDismiss(c.id);
+    }, dismissUndoMs);
+    // undo вызывается из UI: clearTimeout(timer.current); undone = true;
+    return { nid, cancel: () => { undone = true; clearTimeout(timer.current); } };
+  }, [c.id, onDismiss, dismissUndoMs]);
+
+  const conflict = c.status === 'conflict' || c.anchorLost;
+
+  return (
+    <Box
+      p="10px 12px"
+      onClick={() => onNavigateToAnchor(c.id)}
+      style={(t) => ({
+        cursor: 'pointer',
+        borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}`,
+      })}
+    >
+      <Stack gap={8}>
+        {c.edit && <DiffBlock edit={c.edit} />}
+
+        {conflict && (
+          <Group gap={7} wrap="nowrap" p="6px 8px"
+            style={(t) => ({ background: t.colorScheme === 'dark' ? 'rgba(230,180,20,.12)' : '#fff9db', borderRadius: 7 })}>
+            <Text fz={12}>⚠</Text>
+            <Text fz={12} c="yellow.8" style={{ lineHeight: 1.4 }}>Text changed — this edit can’t be applied</Text>
+          </Group>
+        )}
+
+        {parsed.text && !conflict && (
+          <Text fz={12.5} c="dimmed" style={{ lineHeight: 1.45 }}>{parsed.text}</Text>
+        )}
+
+        <Group gap={8} wrap="nowrap" onClick={(e) => e.stopPropagation()}>
+          <Box w={8} h={8} style={(t) => ({ flex: 'none', borderRadius: '50%', background: t.colors[SEV_COLOR[parsed.severity]][6] })} />
+          <Text fz={10} fw={600} tt="uppercase" c="dimmed" style={{ letterSpacing: '.06em', flex: 1, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>
+            {[parsed.category, parsed.severity === 'major' ? 'Major' : parsed.severity === 'critical' ? 'Critical' : null].filter(Boolean).join(' · ')}
+          </Text>
+
+          {c.status === 'applied' ? (
+            <Badge color="green" variant="light" radius="xl" size="sm">✓ Applied</Badge>
+          ) : c.status === 'dismissed' ? (
+            <Badge color="gray" variant="light" radius="xl" size="sm">Dismissed</Badge>
+          ) : conflict ? (
+            <Button size="compact-sm" variant="default" onClick={() => onNavigateToAnchor(c.id)}>Go to text</Button>
+          ) : (
+            <>
+              <Button size="compact-sm" variant="default" color="gray" onClick={dismiss}>Dismiss</Button>
+              <Button size="compact-sm" color="green" loading={busy} onClick={apply}>Apply</Button>
+            </>
+          )}
+        </Group>
+      </Stack>
+    </Box>
+  );
+}
+
+/* ──────────────────────── Человеческий тред ──────────────────────── */
+
+function HumanThread({ c, onResolve, onNavigateToAnchor }: {
+  c: Comment; onResolve?: CommentsPanelProps['onResolve']; onNavigateToAnchor: CommentsPanelProps['onNavigateToAnchor'];
+}) {
+  const parsed = useMemo(() => parseBody(c.bodyRaw), [c.bodyRaw]);
+  return (
+    <Box p="12px 14px" style={(t) => ({ borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+      <Stack gap={9}>
+        <Group gap={8} wrap="nowrap">
+          <Avatar size={26} radius="xl" color="orange">{c.authorName[0]}</Avatar>
+          <Text fz={12.5} fw={600}>{c.authorName}
+            <Text span c="dimmed" fw={400}> · {c.triggeredBy ? `${c.triggeredBy} · ` : ''}{c.createdAtLabel}</Text>
+          </Text>
+          <Box style={{ flex: 1 }} />
+          <Tooltip label="Resolve"><ActionIcon variant="default" size="md" onClick={() => onResolve?.(c.id)}>✓</ActionIcon></Tooltip>
+          <ActionIcon variant="default" size="md">⋯</ActionIcon>
+        </Group>
+        <Text fz={13.5} style={{ lineHeight: 1.5 }}>{parsed.text}</Text>
+        <Group gap={8}>
+          {c.replyCount ? <Text fz={12} c="dimmed">{c.replyCount} replies</Text> : null}
+          <Box style={{ flex: 1 }} />
+          <Button variant="subtle" size="compact-sm">Reply</Button>
+        </Group>
+      </Stack>
+    </Box>
+  );
+}
+
+/* ──────────────────── Шапка серии + прогресс ──────────────────── */
+
+function RunHeader({ runComments, onAcceptAll, progress }: {
+  runComments: Comment[];
+  onAcceptAll: () => void;
+  progress?: { done: number; total: number } | null;
+}) {
+  const head = runComments[0];
+  const majors = runComments.filter((c) => parseBody(c.bodyRaw).severity !== 'minor').length;
+  const applied = runComments.filter((c) => c.status === 'applied').length;
+  return (
+    <Box>
+      <Group gap={10} wrap="nowrap" p="11px 13px" style={(t) => ({ borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+        <Box style={{ position: 'relative', width: 30, height: 30, flex: 'none' }}>
+          <Avatar size={30} radius={8} color="teal">{head.authorName[0]}</Avatar>
+          {head.triggeredBy && (
+            <Avatar size={14} radius="xl" color="gray"
+              style={{ position: 'absolute', right: -4, bottom: -4, border: '2px solid var(--mantine-color-body)' }} />
+          )}
+        </Box>
+        <Stack gap={1} style={{ minWidth: 0 }}>
+          <Text fz={13} fw={600}>{head.authorName}
+            <Text span c="dimmed" fw={400}> · {head.triggeredBy} · {head.createdAtLabel}</Text>
+          </Text>
+          <Text fz={11.5} c="dimmed">
+            {runComments.length} edits · <Text span c="orange.7" fw={600}>{majors} major</Text> · {applied} applied
+          </Text>
+        </Stack>
+        <Box style={{ flex: 1 }} />
+        {!progress && <Button size="compact-sm" color="green" onClick={onAcceptAll}>Accept all</Button>}
+      </Group>
+      {progress && (
+        <Box p="9px 13px 11px" style={(t) => ({ background: t.colorScheme === 'dark' ? 'rgba(47,158,68,.08)' : '#f8fbf9', borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[2]}` })}>
+          <Group gap={8} mb={6}>
+            <Text fz={12} fw={600} c="green.7">Applying {progress.done} of {progress.total}…</Text>
+            <Box style={{ flex: 1 }} />
+            <Button variant="subtle" color="gray" size="compact-xs">Stop</Button>
+          </Group>
+          <Progress value={(progress.done / progress.total) * 100} color="green" size="sm" radius="xl" />
+        </Box>
+      )}
+    </Box>
+  );
+}
+
+/* ──────────────────────────── Панель ──────────────────────────── */
+
+/** Роль-автор для фильтра: у агентов — имя роли, у людей — «Пользователь». */
+function roleOf(c: Comment): string {
+  return c.authorKind === 'human' ? 'Пользователь' : c.authorName;
+}
+
+export function CommentsPanel(props: CommentsPanelProps) {
+  const { comments, onApply, onDismiss, onResolve, onNavigateToAnchor, onClose, dismissUndoMs } = props;
+  const [tab, setTab] = useState<'open' | 'resolved'>('open');
+  const [roleFilter, setRoleFilter] = useState<string | null>(null);
+  const [progress, setProgress] = useState<Record<string, { done: number; total: number }>>({});
+
+  const open = comments.filter((c) => c.status === 'pending' || c.status === 'conflict');
+  const resolved = comments.filter((c) => c.status === 'applied' || c.status === 'dismissed');
+  const list = tab === 'open' ? open : resolved;
+
+  const filtered = list.filter((c) => !roleFilter || roleOf(c) === roleFilter);
+
+  // Роли и счётчики для чипов-фильтров (только роли: Корректор / Фактчекер / Пользователь …).
+  const roles = useMemo(() => {
+    const order: string[] = [];
+    const count: Record<string, number> = {};
+    for (const c of list) {
+      const r = roleOf(c);
+      if (!(r in count)) { count[r] = 0; order.push(r); }
+      count[r]++;
+    }
+    return order.map((r) => ({ role: r, count: count[r] }));
+  }, [list]);
+
+  // Группировка агентских правок по runId; человеческие треды — по одному.
+  const groups = useMemo(() => {
+    const map = new Map<string, Comment[]>();
+    const singles: Comment[] = [];
+    for (const c of filtered) {
+      if (c.authorKind === 'agent' && c.runId && c.edit) {
+        if (!map.has(c.runId)) map.set(c.runId, []);
+        map.get(c.runId)!.push(c);
+      } else singles.push(c);
+    }
+    return { runs: [...map.entries()], singles };
+  }, [filtered]);
+
+  // Пакетное "Accept all" — по одной на фронте, обновляем прогресс.
+  const acceptAll = useCallback(async (runId: string, items: Comment[]) => {
+    const minor = items.filter((c) => parseBody(c.bodyRaw).severity === 'minor' && c.status === 'pending');
+    for (let i = 0; i < minor.length; i++) {
+      setProgress((p) => ({ ...p, [runId]: { done: i, total: minor.length } }));
+      try { await onApply(minor[i].id); } catch { /* конфликт — пропускаем, копим для сводки */ }
+    }
+    setProgress((p) => { const n = { ...p }; delete n[runId]; return n; });
+    notifications.show({ color: 'green', message: `${minor.length} applied` });
+  }, [onApply]);
+
+  return (
+    <Stack gap={0} h="100%" style={{ width: 380, maxWidth: '100%', borderLeft: '1px solid var(--mantine-color-default-border)' }}>
+      {/* Вкладки — статусная ось. Open/Resolved сохранены. */}
+      <Group gap={4} p="10px 14px" style={(t) => ({ borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[2]}` })}>
+        <Tabs value={tab} onChange={(v) => setTab(v as 'open' | 'resolved')} variant="pills">
+          <Tabs.List>
+            <Tabs.Tab value="open" rightSection={<Badge size="sm" variant="light" color="blue">{open.length}</Badge>}>Open</Tabs.Tab>
+            <Tabs.Tab value="resolved" rightSection={<Badge size="sm" variant="light" color="gray">{resolved.length}</Badge>}>Resolved</Tabs.Tab>
+          </Tabs.List>
+        </Tabs>
+        <Box style={{ flex: 1 }} />
+        {onClose && <ActionIcon variant="subtle" color="gray" onClick={onClose}>✕</ActionIcon>}
+      </Group>
+
+      {/* Фильтры-чипы: только по ролям (Корректор / Фактчекер / Пользователь). */}
+      {tab === 'open' && roles.length > 1 && (
+        <ScrollArea type="never" p="8px 14px" style={(t) => ({ borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+          <Group gap={6} wrap="nowrap">
+            <FilterChip active={!roleFilter} onClick={() => setRoleFilter(null)} label={`All ${list.length}`} solid />
+            {roles.map(({ role, count }) => (
+              <FilterChip key={role} active={roleFilter === role} onClick={() => setRoleFilter(roleFilter === role ? null : role)} label={`${role} ${count}`} />
+            ))}
+          </Group>
+        </ScrollArea>
+      )}
+
+      {/* Лента */}
+      <ScrollArea style={{ flex: 1 }} bg="var(--mantine-color-default-hover)">
+        {filtered.length === 0 ? (
+          <EmptyState tab={tab} />
+        ) : (
+          <>
+            {groups.runs.map(([runId, items]) => (
+              <Box key={runId} m="6px 10px" bg="var(--mantine-color-body)" style={{ border: '1px solid var(--mantine-color-default-border)', borderRadius: 10, overflow: 'hidden' }}>
+                <RunHeader runComments={items} progress={progress[runId] ?? null} onAcceptAll={() => acceptAll(runId, items)} />
+                {items.map((c) => (
+                  <EditCard key={c.id} c={c} onApply={onApply} onDismiss={onDismiss} onNavigateToAnchor={onNavigateToAnchor} dismissUndoMs={dismissUndoMs} />
+                ))}
+              </Box>
+            ))}
+            {groups.singles.map((c) => (
+              <Box key={c.id} m="6px 10px" bg="var(--mantine-color-body)" style={{ border: '1px solid var(--mantine-color-default-border)', borderRadius: 10, overflow: 'hidden' }}>
+                {c.edit
+                  ? <EditCard c={c} onApply={onApply} onDismiss={onDismiss} onNavigateToAnchor={onNavigateToAnchor} dismissUndoMs={dismissUndoMs} />
+                  : <HumanThread c={c} onResolve={onResolve} onNavigateToAnchor={onNavigateToAnchor} />}
+              </Box>
+            ))}
+          </>
+        )}
+      </ScrollArea>
+    </Stack>
+  );
+}
+
+/* ─────────────────────── Мелкие компоненты ─────────────────────── */
+
+function FilterChip({ label, active, onClick, dot, solid }: {
+  label: string; active: boolean; onClick: () => void; dot?: string; solid?: boolean;
+}) {
+  return (
+    <Button
+      onClick={onClick}
+      size="compact-sm"
+      radius="xl"
+      variant={active ? 'filled' : 'default'}
+      color={active ? (solid ? 'dark' : 'blue') : 'gray'}
+      leftSection={dot ? <Box w={7} h={7} style={(t) => ({ borderRadius: '50%', background: t.colors[dot][6] })} /> : undefined}
+      styles={{ root: { flex: 'none' }, label: { fontWeight: 600, fontSize: 12 } }}
+    >
+      {label}
+    </Button>
+  );
+}
+
+function EmptyState({ tab }: { tab: 'open' | 'resolved' }) {
+  const isOpen = tab === 'open';
+  return (
+    <Stack align="center" gap={6} p="40px 20px">
+      <Avatar size={40} radius="xl" color={isOpen ? 'green' : 'gray'}>{isOpen ? '✓' : '◌'}</Avatar>
+      <Text fw={600} fz={13}>{isOpen ? 'All caught up' : 'Nothing here yet'}</Text>
+      <Text fz={12} c="dimmed" ta="center" style={{ lineHeight: 1.45 }}>
+        {isOpen ? 'No edits waiting on you.' : 'Applied and closed items will appear here.'}
+      </Text>
+    </Stack>
+  );
+}
+
+export default CommentsPanel;

NewDesign/PageHistoryModal.tsx

@@ -0,0 +1,362 @@
+/**
+ * PageHistoryModal — редизайн окна «Page history».
+ * Mantine v7. Light/dark. Полноразмерное модальное окно.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * ЧТО ЭТО
+ * ─────────────────────────────────────────────────────────────────────────
+ * Окно истории версий страницы. Слева — панель навигации: мини-календарь
+ * (heatmap: яркость дня = число ревизий, обводка = выбранный день) + плотный
+ * список ревизий (одна ревизия = одна строка). Справа — реально отрендеренная
+ * версия страницы с подсветкой изменений. Все контролы — в одну строку шапки.
+ *
+ * Ключевые решения:
+ *  - Плотный список: одна ревизия на строку (аватар · время · автор · [SAVED]).
+ *    Бейдж показывается ТОЛЬКО у сохранённых версий; всё остальное — autosave.
+ *  - Агентские ревизии визуально отличаются: квадратный глиф роли (К/Ф) вместо
+ *    круглого аватара пользователя + «via <кто запустил>».
+ *  - Календарь объединён со списком в одной панели (мини-календарь = date jumper).
+ *  - Highlight changes + навигация по изменениям (N of M, ↑/↓) вынесены в шапку.
+ *  - Текущая версия помечена; Restore для неё недоступен.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * УСТАНОВКА / ИСПОЛЬЗОВАНИЕ
+ * ─────────────────────────────────────────────────────────────────────────
+ *   import { PageHistoryModal, Revision } from './PageHistoryModal';
+ *
+ *   <PageHistoryModal
+ *     opened={open}
+ *     onClose={() => setOpen(false)}
+ *     revisions={revisions}                 // Revision[]
+ *     selectedId={selId}
+ *     onSelect={setSelId}                    // клик по ревизии → рендер справа
+ *     renderVersion={(rev) => <ArticleView versionId={rev.id} />}  // ваш рендер страницы
+ *     highlightChanges={hl}
+ *     onToggleHighlight={setHl}
+ *     changeNav={{ index: 1, total: 3, onPrev, onNext }}  // навигация по диффу
+ *     onlySaved={onlySaved}
+ *     onToggleOnlySaved={setOnlySaved}
+ *     onRestore={(rev) => api.restore(rev.id)}   // async; текущая версия → disabled
+ *   />
+ *
+ * Требует MantineProvider на корне приложения (defaultColorScheme="auto" для тем).
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * ФОРМАТ ДАННЫХ
+ * ─────────────────────────────────────────────────────────────────────────
+ *   interface Revision {
+ *     id: string;
+ *     at: Date | string;        // время ревизии; форматируется вызывающим/util-ом
+ *     dayGroup: string;         // 'Today' | 'Yesterday' | 'Mon 12 Jul' — заголовок группы
+ *     saved: boolean;           // true → бейдж SAVED; false → autosave (без бейджа)
+ *     author: { name: string } & (
+ *       | { kind: 'human' }
+ *       | { kind: 'agent'; role: string; triggeredBy: string }  // роль + кто запустил
+ *     );
+ *     isCurrent?: boolean;      // текущая (последняя) версия — Restore недоступен
+ *   }
+ *
+ * Ревизии приходят плоским массивом; группировка по dayGroup — на клиенте.
+ * Никаких изменений API не требуется: агентское авторство берётся из author.kind.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * СОСТОЯНИЯ (нарисованы/поддержаны)
+ * ─────────────────────────────────────────────────────────────────────────
+ *  - Ревизия: обычная / hover / выбранная / текущая / агентская / человеческая.
+ *  - Restore: default / disabled (выбрана текущая) / loading (спиннер после клика).
+ *  - Highlight changes: on/off; при off навигация по изменениям неактивна.
+ *  - Пустая история: одна версия / нет ревизий → EmptyState.
+ *  - Тёмная тема: через токены Mantine (useMantineColorScheme, var(--mantine-*)).
+ */
+import { useMemo, useState, useCallback } from 'react';
+import {
+  Modal, Box, Group, Stack, Text, Switch, Avatar, Badge, Button, ActionIcon,
+  ScrollArea, useMantineTheme, useMantineColorScheme,
+} from '@mantine/core';
+
+/* ─────────────────────────── Типы ─────────────────────────── */
+
+export type Author =
+  | { name: string; kind: 'human' }
+  | { name: string; kind: 'agent'; role: string; triggeredBy: string };
+
+export interface Revision {
+  id: string;
+  at: Date | string;
+  atLabel: string;      // предформатированное «5:35AM»
+  dayGroup: string;     // «Today» | «Yesterday» | «Mon 12 Jul»
+  saved: boolean;
+  author: Author;
+  isCurrent?: boolean;
+}
+
+export interface CalendarDay {
+  label: string;        // «12»
+  inMonth: boolean;
+  count: number;        // число ревизий за день (для heatmap)
+  selected?: boolean;
+  date: Date | string;
+}
+
+export interface PageHistoryModalProps {
+  opened: boolean;
+  onClose: () => void;
+  revisions: Revision[];
+  selectedId: string | null;
+  onSelect: (id: string) => void;
+  renderVersion: (rev: Revision | null) => React.ReactNode;
+  highlightChanges: boolean;
+  onToggleHighlight: (v: boolean) => void;
+  changeNav?: { index: number; total: number; onPrev: () => void; onNext: () => void };
+  onlySaved: boolean;
+  onToggleOnlySaved: (v: boolean) => void;
+  onRestore: (rev: Revision) => Promise<void>;
+  /** Ячейки текущего месяца календаря + управление. Необязательно — без него панель = только список. */
+  calendar?: {
+    monthLabel: string;      // «July 2025»
+    weekdays: string[];      // ['Mon',…,'Sun']
+    days: CalendarDay[];     // обычно 35/42 ячейки
+    onPrevMonth: () => void;
+    onNextMonth: () => void;
+    onToday: () => void;
+    onPickDay: (d: CalendarDay) => void;
+  };
+}
+
+/* ─────────────────────────── Утилиты представления ─────────────────────────── */
+
+const USER_PALETTE = ['#495057', '#e8590c', '#1c7ed6', '#7048e8', '#0ca678'];
+function userColor(name: string) {
+  let h = 0;
+  for (let i = 0; i < name.length; i++) h = (h * 31 + name.charCodeAt(i)) >>> 0;
+  return USER_PALETTE[h % USER_PALETTE.length];
+}
+const AGENT_GRAD: Record<string, string> = {
+  'Корректор': 'linear-gradient(135deg,#20c997,#12b886)',
+  'Фактчекер': 'linear-gradient(135deg,#4c6ef5,#7048e8)',
+};
+function agentGrad(role: string) { return AGENT_GRAD[role] ?? 'linear-gradient(135deg,#868e96,#495057)'; }
+
+/** heatmap: число ревизий → фон/текст ячейки календаря. */
+function heat(n: number, dark: boolean) {
+  if (n === 0) return { bg: 'transparent', fg: dark ? '#5c5f66' : '#adb5bd' };
+  if (n <= 2) return { bg: dark ? 'rgba(34,139,230,.20)' : '#e7f0ff', fg: dark ? '#74c0fc' : '#1971c2' };
+  if (n <= 4) return { bg: dark ? 'rgba(34,139,230,.45)' : '#a5c8ff', fg: dark ? '#dbeafe' : '#0b3d91' };
+  return { bg: '#4c8dff', fg: '#ffffff' };
+}
+
+/* ─────────────────────────── Строка ревизии ─────────────────────────── */
+
+function RevisionRow({ rev, selected, onSelect }: { rev: Revision; selected: boolean; onSelect: () => void }) {
+  const theme = useMantineTheme();
+  const { colorScheme } = useMantineColorScheme();
+  const dark = colorScheme === 'dark';
+  const a = rev.author;
+  const isAgent = a.kind === 'agent';
+
+  return (
+    <Group
+      gap={8} wrap="nowrap" h={28} px="12px 14px" m="1px 6px"
+      onClick={onSelect}
+      style={{
+        cursor: 'pointer', borderRadius: 7,
+        background: selected ? (dark ? 'rgba(34,139,230,.14)' : '#eef4ff')
+          : isAgent ? (dark ? 'rgba(112,72,232,.06)' : '#fbfaff') : undefined,
+      }}
+    >
+      {/* аватар/глиф */}
+      {isAgent ? (
+        <Box style={{ flex: 'none', width: 16, height: 16, borderRadius: 4, background: agentGrad(a.role), display: 'flex', alignItems: 'center', justifyContent: 'center', color: '#fff', font: '700 8px system-ui' }}>
+          {a.role[0]}
+        </Box>
+      ) : (
+        <Box style={{ flex: 'none', width: 16, height: 16, borderRadius: '50%', background: userColor(a.name), display: 'flex', alignItems: 'center', justifyContent: 'center', color: '#fff', font: '700 8px system-ui' }}>
+          {a.name[0].toUpperCase()}
+        </Box>
+      )}
+      {/* время */}
+      <Text fz={12.5} fw={rev.isCurrent ? 600 : 500} c={rev.isCurrent ? undefined : 'dimmed'} style={{ flex: 'none', minWidth: 58 }}>
+        {rev.atLabel}
+      </Text>
+      {/* автор + via */}
+      <Group gap={4} wrap="nowrap" style={{ flex: 1, minWidth: 0, alignItems: 'baseline', overflow: 'hidden' }}>
+        <Text fz={12} fw={isAgent ? 600 : 400} c={isAgent ? undefined : 'dimmed'} truncate style={{ flex: 'none', maxWidth: 100 }}>
+          {isAgent ? a.role : a.name}
+        </Text>
+        {isAgent && <Text fz={11} c="dimmed" truncate>· via {a.triggeredBy}</Text>}
+      </Group>
+      {/* бейдж — только SAVED */}
+      {rev.saved && <Badge size="sm" radius="sm" variant="light" color="blue">SAVED</Badge>}
+    </Group>
+  );
+}
+
+/* ─────────────────────────── Мини-календарь ─────────────────────────── */
+
+function MiniCalendar({ cal }: { cal: NonNullable<PageHistoryModalProps['calendar']> }) {
+  const { colorScheme } = useMantineColorScheme();
+  const dark = colorScheme === 'dark';
+  return (
+    <Box p="10px 12px 8px" style={(t) => ({ borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+      <Group gap={6} mb={6}>
+        <ActionIcon variant="subtle" color="gray" size="sm" onClick={cal.onPrevMonth}>‹</ActionIcon>
+        <Text fz={12} fw={600}>{cal.monthLabel}</Text>
+        <ActionIcon variant="subtle" color="gray" size="sm" onClick={cal.onNextMonth}>›</ActionIcon>
+        <Box style={{ flex: 1 }} />
+        <Button variant="subtle" size="compact-xs" onClick={cal.onToday}>Today</Button>
+      </Group>
+      <Box style={{ display: 'grid', gridTemplateColumns: 'repeat(7,1fr)', gap: 2, marginBottom: 2 }}>
+        {cal.weekdays.map((w) => (
+          <Text key={w} ta="center" fz={8.5} fw={600} c="dimmed">{w}</Text>
+        ))}
+      </Box>
+      <Box style={{ display: 'grid', gridTemplateColumns: 'repeat(7,1fr)', gap: 2 }}>
+        {cal.days.map((d, i) => {
+          const h = heat(d.count, dark);
+          return (
+            <Box
+              key={i} onClick={() => cal.onPickDay(d)}
+              style={{
+                position: 'relative', height: 26, borderRadius: 6, cursor: 'pointer',
+                display: 'flex', alignItems: 'center', justifyContent: 'center',
+                background: d.inMonth ? h.bg : 'transparent',
+                boxShadow: d.selected ? `inset 0 0 0 2px ${dark ? '#f1f3f5' : '#1a1b1e'}` : undefined,
+              }}
+            >
+              <Text fz={10.5} fw={d.selected ? 700 : 500} style={{ color: d.inMonth ? h.fg : (dark ? '#3a3d42' : '#dee2e6') }}>
+                {d.label}
+              </Text>
+            </Box>
+          );
+        })}
+      </Box>
+      {/* легенда heatmap */}
+      <Group gap={6} mt={8} align="center">
+        <Text fz={9.5} c="dimmed">fewer</Text>
+        {['#e7f0ff', '#a5c8ff', '#4c8dff'].map((c) => (
+          <Box key={c} style={{ width: 14, height: 10, borderRadius: 2, background: c }} />
+        ))}
+        <Text fz={9.5} c="dimmed">more revisions</Text>
+      </Group>
+    </Box>
+  );
+}
+
+/* ─────────────────────────── Окно ─────────────────────────── */
+
+export function PageHistoryModal(props: PageHistoryModalProps) {
+  const {
+    opened, onClose, revisions, selectedId, onSelect, renderVersion,
+    highlightChanges, onToggleHighlight, changeNav, onlySaved, onToggleOnlySaved,
+    onRestore, calendar,
+  } = props;
+  const [restoring, setRestoring] = useState(false);
+
+  const selected = revisions.find((r) => r.id === selectedId) ?? null;
+  const isEmpty = revisions.length <= 1;
+
+  // группировка по dayGroup, с фильтром Only saved
+  const groups = useMemo(() => {
+    const list = onlySaved ? revisions.filter((r) => r.saved) : revisions;
+    const map: { head: string; items: Revision[] }[] = [];
+    for (const r of list) {
+      let g = map.find((x) => x.head === r.dayGroup);
+      if (!g) { g = { head: r.dayGroup, items: [] }; map.push(g); }
+      g.items.push(r);
+    }
+    return map;
+  }, [revisions, onlySaved]);
+
+  const restore = useCallback(async () => {
+    if (!selected || selected.isCurrent) return;
+    setRestoring(true);
+    try { await onRestore(selected); } finally { setRestoring(false); }
+  }, [selected, onRestore]);
+
+  return (
+    <Modal
+      opened={opened} onClose={onClose} withCloseButton={false}
+      size="80rem" radius="lg" padding={0}
+      styles={{ body: { height: '80vh', maxHeight: 760, display: 'flex', flexDirection: 'column' } }}
+      overlayProps={{ backgroundOpacity: 0.5, blur: 1 }}
+    >
+      {/* ── single-row toolbar ── */}
+      <Group gap={14} h={60} px={16} wrap="nowrap" style={(t) => ({ flex: 'none', borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+        <Text fz={16} fw={600}>Page history</Text>
+        <Box style={(t) => ({ width: 1, height: 22, background: t.colorScheme === 'dark' ? t.colors.dark[4] : t.colors.gray[2] })} />
+        <Stack gap={1} style={{ minWidth: 0 }}>
+          <Text fz={12} fw={600} truncate>{selected ? `${selected.dayGroup} · ${selected.atLabel}` : '—'}</Text>
+          <Text fz={10.5} c="dimmed">selected version</Text>
+        </Stack>
+
+        <Box style={{ flex: 1 }} />
+
+        {/* diff cluster */}
+        <Group gap={2} p={3} wrap="nowrap" style={(t) => ({ background: t.colorScheme === 'dark' ? t.colors.dark[6] : '#f4f6f8', borderRadius: 10 })}>
+          <Button variant="white" size="compact-sm" onClick={() => onToggleHighlight(!highlightChanges)}
+            leftSection={<Switch checked={highlightChanges} onChange={() => {}} size="xs" tabIndex={-1} styles={{ track: { cursor: 'pointer' } }} />}
+            styles={{ root: { boxShadow: '0 1px 2px rgba(0,0,0,.08)' } }}>
+            Highlight changes
+          </Button>
+          {changeNav && (
+            <>
+              <Text fz={12} fw={600} c="dimmed" px={6}>{changeNav.index} / {changeNav.total}</Text>
+              <Box style={{ display: 'flex' }}>
+                <ActionIcon variant="subtle" color="gray" size="lg" disabled={!highlightChanges} onClick={changeNav.onPrev} style={{ width: 26 }}>↑</ActionIcon>
+                <ActionIcon variant="subtle" color="gray" size="lg" disabled={!highlightChanges} onClick={changeNav.onNext} style={{ width: 26 }}>↓</ActionIcon>
+              </Box>
+            </>
+          )}
+        </Group>
+
+        <Box style={(t) => ({ width: 1, height: 22, background: t.colorScheme === 'dark' ? t.colors.dark[4] : t.colors.gray[2] })} />
+
+        <Button color="blue" onClick={restore} loading={restoring} disabled={!selected || selected.isCurrent}>
+          Restore this version
+        </Button>
+        <ActionIcon variant="subtle" color="gray" size="lg" onClick={onClose}>✕</ActionIcon>
+      </Group>
+
+      {/* ── body ── */}
+      <Box style={{ flex: 1, display: 'flex', minHeight: 0 }}>
+        {/* left: nav panel */}
+        <Stack gap={0} style={(t) => ({ flex: 'none', width: 280, minHeight: 0, borderRight: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}`, background: t.colorScheme === 'dark' ? t.colors.dark[7] : '#fcfcfd' })}>
+          <Group h={44} px={16} style={(t) => ({ flex: 'none', borderBottom: `1px solid ${t.colorScheme === 'dark' ? t.colors.dark[5] : t.colors.gray[1]}` })}>
+            <Switch checked={onlySaved} onChange={(e) => onToggleOnlySaved(e.currentTarget.checked)} size="sm" label="Only saved" labelPosition="right" styles={{ label: { fontSize: 13, fontWeight: 500 } }} />
+          </Group>
+
+          {calendar && <MiniCalendar cal={calendar} />}
+
+          <ScrollArea style={{ flex: 1 }}>
+            {groups.map((g) => (
+              <Box key={g.head}>
+                <Text px={16} pt={9} pb={5} fz={10.5} fw={600} tt="uppercase" c="dimmed" style={{ letterSpacing: '.05em', position: 'sticky', top: 0, zIndex: 2, background: 'var(--mantine-color-body)' }}>
+                  {g.head}
+                </Text>
+                {g.items.map((r) => (
+                  <RevisionRow key={r.id} rev={r} selected={r.id === selectedId} onSelect={() => onSelect(r.id)} />
+                ))}
+              </Box>
+            ))}
+          </ScrollArea>
+        </Stack>
+
+        {/* right: rendered version */}
+        <ScrollArea style={{ flex: 1, minWidth: 0 }} bg="var(--mantine-color-default-hover)">
+          {isEmpty ? (
+            <Stack align="center" justify="center" h="100%" gap={6} p={40}>
+              <Text fw={600} fz={14}>No earlier versions</Text>
+              <Text fz={12.5} c="dimmed" ta="center">У страницы пока одна версия — сравнивать не с чем.</Text>
+            </Stack>
+          ) : (
+            <Box p="26px 0" maw={660} mx="auto">
+              {renderVersion(selected)}
+            </Box>
+          )}
+        </ScrollArea>
+      </Box>
+    </Modal>
+  );
+}
+
+export default PageHistoryModal;

NewDesign/TimeWorkedModal.tsx

@@ -0,0 +1,234 @@
+/**
+ * TimeWorkedModal — редизайн окна «Time worked on this article».
+ * Mantine v7. Light/dark.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * ЧТО ЭТО
+ * ─────────────────────────────────────────────────────────────────────────
+ * Сводка трудозатрат по дням в виде суточных таймлайнов. Главное отличие от
+ * старой версии: на барах ВИДНО время суток. Реализовано двумя способами
+ * (проп `axis`):
+ *   - 'grid'   — ось часов 00–06–12–18–24 сверху + вертикальные деления,
+ *                ночные часы (0–6, 21–24) слегка затемнены. По умолчанию.
+ *   - 'phases' — цветные полосы фаз дня за блоками (Ночь/Утро/День/Вечер),
+ *                период суток читается сразу, без счёта делений.
+ *
+ * Блоки позиционируются по времени: left = start/24, width = dur/24.
+ * Интенсивность (opacity) блока = длительность/плотность работы, чтобы
+ * очень короткие сессии не терялись (минимальная видимая ширина задана).
+ * Hover-тултип на блоке: начало–конец · длительность.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * УСТАНОВКА / ИСПОЛЬЗОВАНИЕ
+ * ─────────────────────────────────────────────────────────────────────────
+ *   import { TimeWorkedModal, DaySummary } from './TimeWorkedModal';
+ *
+ *   <TimeWorkedModal
+ *     opened={open}
+ *     onClose={() => setOpen(false)}
+ *     totalLabel="≈ 34h"
+ *     agentLabel="≈ 1h 20m"          // undefined → строку agent не показываем
+ *     days={days}                     // DaySummary[]
+ *     axis="grid"                     // 'grid' | 'phases'
+ *     tz="Europe/Moscow"
+ *     inactivityGapMin={15}
+ *   />
+ *
+ * Требует MantineProvider на корне.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * ФОРМАТ ДАННЫХ
+ * ─────────────────────────────────────────────────────────────────────────
+ *   interface Block {
+ *     start: number;   // час начала в сутках, 0..24 (напр. 13.7 = 13:42)
+ *     end: number;     // час конца
+ *     kind: 'work' | 'agent';
+ *   }
+ *   interface DaySummary {
+ *     label: string;       // «Mon 29 Jun»
+ *     totalLabel: string;  // «1h 24m» | «—» для пустого дня
+ *     blocks: Block[];     // [] → пустой день (полупрозрачная дорожка, итог «—»)
+ *     isToday?: boolean;   // сегодня — неполные сутки (рисуем границу «сейчас»)
+ *     nowFraction?: number;// 0..1 позиция «сейчас» для isToday
+ *   }
+ *
+ * Данные уже есть в бэкенде трудозатрат: сессии с началом/концом + тип
+ * (work/agent). Часы = локальные к tz. Изменений API не требуется.
+ *
+ * ─────────────────────────────────────────────────────────────────────────
+ * СОСТОЯНИЯ (нарисованы/поддержаны)
+ * ─────────────────────────────────────────────────────────────────────────
+ *  - День: с активностью (work+agent) / только work / только agent / пустой (—).
+ *  - Сегодня: граница «сейчас» на дорожке (nowFraction).
+ *  - Короткий блок: минимальная ширина, не исчезает.
+ *  - Пустая панель целиком: нет трудозатрат → EmptyState.
+ *  - Длинный период: вертикальный скролл списка дней, шапка/легенда липкие.
+ *  - Тёмная тема: токены Mantine.
+ */
+import { Modal, Box, Group, Stack, Text, ActionIcon, ScrollArea, Tooltip, useMantineColorScheme } from '@mantine/core';
+
+/* ─────────────────────────── Типы ─────────────────────────── */
+
+export interface Block { start: number; end: number; kind: 'work' | 'agent'; }
+export interface DaySummary {
+  label: string;
+  totalLabel: string;
+  blocks: Block[];
+  isToday?: boolean;
+  nowFraction?: number;
+}
+export interface TimeWorkedModalProps {
+  opened: boolean;
+  onClose: () => void;
+  totalLabel: string;
+  agentLabel?: string;
+  days: DaySummary[];
+  axis?: 'grid' | 'phases';
+  tz?: string;
+  inactivityGapMin?: number;
+}
+
+const WORK = '#3b82f6';
+const AGENT = '#c026d3';
+
+const PHASES = [
+  { name: 'Ночь', s: 0, e: 6, bg: 'rgba(99,102,241,.10)', lg: '#e8eaff', fg: '#5b60c9' },
+  { name: 'Утро', s: 6, e: 12, bg: 'rgba(245,159,0,.10)', lg: '#fff2dc', fg: '#b5820e' },
+  { name: 'День', s: 12, e: 18, bg: 'rgba(56,178,172,.10)', lg: '#dcf5f2', fg: '#1a857d' },
+  { name: 'Вечер', s: 18, e: 24, bg: 'rgba(139,92,246,.11)', lg: '#efe7ff', fg: '#6d43c0' },
+];
+
+/* ─────────────────────────── Блок активности ─────────────────────────── */
+
+function fmtHour(h: number) {
+  const hh = Math.floor(h);
+  const mm = Math.round((h - hh) * 60);
+  return `${String(hh).padStart(2, '0')}:${String(mm).padStart(2, '0')}`;
+}
+function fmtDur(h: number) {
+  const total = Math.round(h * 60);
+  const hh = Math.floor(total / 60), mm = total % 60;
+  return hh ? `${hh}h ${mm}m` : `${mm}m`;
+}
+
+function ActivityBlock({ b }: { b: Block }) {
+  const left = (b.start / 24) * 100;
+  const width = Math.max(((b.end - b.start) / 24) * 100, 0.6);
+  const dur = b.end - b.start;
+  const opacity = dur < 0.16 ? 0.5 : dur < 0.35 ? 0.8 : 1;
+  return (
+    <Tooltip label={`${fmtHour(b.start)} – ${fmtHour(b.end)} · ${fmtDur(dur)}`} withArrow openDelay={120} fz={11}>
+      <Box style={{
+        position: 'absolute', top: 5, height: 14, left: `${left}%`, width: `${width}%`,
+        borderRadius: 2, background: b.kind === 'agent' ? AGENT : WORK, opacity, cursor: 'default',
+      }} />
+    </Tooltip>
+  );
+}
+
+/* ─────────────────────────── Дорожка дня ─────────────────────────── */
+
+function DayTrack({ d, axis, dark }: { d: DaySummary; axis: 'grid' | 'phases'; dark: boolean }) {
+  const trackBg = axis === 'grid'
+    ? 'linear-gradient(90deg, rgba(90,100,130,.10) 0 25%, rgba(90,100,130,.02) 25% 87.5%, rgba(90,100,130,.10) 87.5% 100%)'
+    : (dark ? 'rgba(255,255,255,.04)' : '#f6f8fa');
+
+  return (
+    <Group gap={0} h={30} wrap="nowrap">
+      <Text style={{ flex: 'none', width: 92 }} fz={13} c="dimmed">{d.label}</Text>
+      <Box style={{ position: 'relative', flex: 1, height: 24, margin: '0 4px', borderRadius: 5, overflow: 'hidden', background: trackBg }}>
+        {/* фон: полосы фаз или деления сетки */}
+        {axis === 'phases'
+          ? PHASES.map((ph) => (
+              <Box key={ph.name} style={{ position: 'absolute', top: 0, bottom: 0, left: `${(ph.s / 24) * 100}%`, width: `${((ph.e - ph.s) / 24) * 100}%`, background: ph.bg }} />
+            ))
+          : [25, 50, 75].map((p) => (
+              <Box key={p} style={{ position: 'absolute', top: 0, bottom: 0, left: `${p}%`, width: 1, background: 'rgba(120,130,150,.16)' }} />
+            ))}
+        {/* блоки */}
+        {d.blocks.map((b, i) => <ActivityBlock key={i} b={b} />)}
+        {/* граница «сейчас» для сегодняшнего дня */}
+        {d.isToday && d.nowFraction != null && (
+          <Box style={{ position: 'absolute', top: 0, bottom: 0, left: `${d.nowFraction * 100}%`, width: 2, background: '#fa5252' }} />
+        )}
+      </Box>
+      <Text style={{ flex: 'none', width: 64, textAlign: 'right' }} fz={12.5} fw={500} c={d.totalLabel === '—' ? 'dimmed' : undefined}>
+        {d.totalLabel}
+      </Text>
+    </Group>
+  );
+}
+
+/* ─────────────────────────── Окно ─────────────────────────── */
+
+export function TimeWorkedModal(props: TimeWorkedModalProps) {
+  const { opened, onClose, totalLabel, agentLabel, days, axis = 'grid', tz = 'Europe/Moscow', inactivityGapMin = 15 } = props;
+  const { colorScheme } = useMantineColorScheme();
+  const dark = colorScheme === 'dark';
+  const isEmpty = days.length === 0 || days.every((d) => d.blocks.length === 0);
+
+  return (
+    <Modal opened={opened} onClose={onClose} withCloseButton={false} size="46rem" radius="lg" padding={0}
+      overlayProps={{ backgroundOpacity: 0.5, blur: 1 }}>
+      <Box p="22px 24px 20px">
+        {/* header */}
+        <Group mb={14}>
+          <Text fz={17} fw={600}>Time worked on this article</Text>
+          <Box style={{ flex: 1 }} />
+          <ActionIcon variant="subtle" color="gray" size="lg" onClick={onClose}>✕</ActionIcon>
+        </Group>
+
+        {/* summary */}
+        <Group align="baseline" gap={16} mb={axis === 'grid' ? 8 : 16}>
+          <Text fz={22} fw={700}>{totalLabel}</Text>
+          {agentLabel && <Text fz={13} c="dimmed">agent: {agentLabel}</Text>}
+        </Group>
+
+        {/* legend (grid only) */}
+        {axis === 'grid' && (
+          <Group gap={16} mb={16}>
+            <Group gap={6}><Box w={12} h={12} style={{ borderRadius: 3, background: WORK }} /><Text fz={12} fw={500} c="dimmed">Work</Text></Group>
+            <Group gap={6}><Box w={12} h={12} style={{ borderRadius: 3, background: AGENT }} /><Text fz={12} fw={500} c="dimmed">Agent</Text></Group>
+          </Group>
+        )}
+
+        {isEmpty ? (
+          <Stack align="center" gap={6} p="48px 20px">
+            <Text fw={600} fz={14}>No time tracked yet</Text>
+            <Text fz={12.5} c="dimmed" ta="center">По этой статье ещё нет трудозатрат.</Text>
+          </Stack>
+        ) : (
+          <>
+            {/* axis header (sticky) */}
+            <Group gap={0} mb={5} wrap="nowrap" style={{ position: 'sticky', top: 0, zIndex: 2, background: 'var(--mantine-color-body)' }}>
+              <Box style={{ flex: 'none', width: 92 }} />
+              {axis === 'grid' ? (
+                <Box style={{ flex: 1, position: 'relative', height: 14, margin: '0 4px' }}>
+                  {[['0%', '00', 'flex-start'], ['25%', '06', 'center'], ['50%', '12', 'center'], ['75%', '18', 'center'], ['100%', '24', 'flex-end']].map(([l, t, al]) => (
+                    <Text key={t as string} fz={10} fw={500} c="dimmed" style={{ position: 'absolute', left: l as string, transform: al === 'center' ? 'translateX(-50%)' : al === 'flex-end' ? 'translateX(-100%)' : undefined }}>{t}</Text>
+                  ))}
+                </Box>
+              ) : (
+                <Box style={{ flex: 1, display: 'flex', height: 16, margin: '0 4px', borderRadius: 4, overflow: 'hidden' }}>
+                  {PHASES.map((ph) => (
+                    <Box key={ph.name} style={{ flex: ph.e - ph.s, display: 'flex', alignItems: 'center', justifyContent: 'center', background: ph.lg, color: ph.fg, font: '600 9.5px system-ui' }}>{ph.name}</Box>
+                  ))}
+                </Box>
+              )}
+              <Box style={{ flex: 'none', width: 64 }} />
+            </Group>
+
+            {/* day rows */}
+            <ScrollArea.Autosize mah="60vh" type="hover">
+              {days.map((d, i) => <DayTrack key={i} d={d} axis={axis} dark={dark} />)}
+            </ScrollArea.Autosize>
+          </>
+        )}
+
+        <Text mt={16} fz={11.5} c="dimmed">Estimate · timezone {tz} · inactivity gap {inactivityGapMin} min</Text>
+      </Box>
+    </Modal>
+  );
+}
+
+export default TimeWorkedModal;

agent-roles-catalog/bundles/assistants/en.yaml

@@ -346,6 +346,9 @@ roles:
         □ Working sections ("Log", "Open Questions", "Revision") are moved to an
           appendix at the end of the document or clearly separated from the report
           body.
+        □ Once the report is complete, call save_page_version to pin the finished
+          document as a restorable named version (a checkpoint the reader can
+          return to). A repeat call after no further edits is a harmless no-op.
       Be honest about gaps. If you couldn't find something, say so — don't disguise
       a guess as a fact.
     autoStart: false
@@ -442,6 +445,7 @@ roles:
       - **The language of the notes = the main language of the call.** Technical terms — in their canonical spelling (usually Latin).
       - **Don't evaluate the participants** and don't comment on the quality of the discussion.
       - The output is the notes only, with no preambles or meta-comments, apart from targeted uncertainty marks.
+      - **Pin the result.** Once the notes are complete on the page, call save_page_version to save them as a restorable named version (a checkpoint). Calling it again after no further edits is a harmless no-op.
 
       ## Style example (excerpt)
 

agent-roles-catalog/bundles/assistants/ru.yaml

@@ -345,6 +345,9 @@ roles:
         □ Working sections («Журнал», «Открытые вопросы», «Ревизия») are moved to
           an appendix at the end of the document or clearly separated from the
           report body.
+        □ Once the report is complete, call save_page_version to pin the finished
+          document as a restorable named version (a checkpoint the reader can
+          return to). A repeat call after no further edits is a harmless no-op.
       Be honest about gaps. If you couldn't find something, say so — don't disguise
       a guess as a fact.
     autoStart: false
@@ -441,6 +444,7 @@ roles:
       - **Язык конспекта = основной язык созвона.** Технические термины — в каноническом написании (обычно латиницей).
       - **Не оценивай участников** и не комментируй качество обсуждения.
       - На выходе — только конспект, без преамбул и мета-комментариев, кроме точечных пометок неуверенности.
+      - **Зафиксируй результат.** Когда конспект готов на странице, вызови save_page_version, чтобы сохранить его как именованную версию (точку восстановления). Повторный вызов без новых правок — безвредный no-op.
 
       ## Пример стиля (фрагмент)
 

agent-roles-catalog/index.yaml

@@ -33,6 +33,6 @@ bundles:
       - en
     roles:
       - slug: researcher
-        version: 9
+        version: 10
       - slug: call-summarizer
-        version: 1
+        version: 2

apps/client/public/locales/en-US/translation.json

@@ -1,4 +1,7 @@
 {
+  "1 year": "1 year",
+  "30 days": "30 days",
+  "90 days": "90 days",
   "A new version is available": "A new version is available",
   "Account": "Account",
   "Active": "Active",
@@ -10,11 +13,16 @@
   "Add space members": "Add space members",
   "Add to favorites": "Add to favorites",
   "Admin": "Admin",
+  "API key created": "API key created",
+  "API key revoked": "API key revoked",
+  "API keys across the workspace.": "API keys across the workspace.",
   "Are you sure you want to delete this group? Members will lose access to resources this group has access to.": "Are you sure you want to delete this group? Members will lose access to resources this group has access to.",
   "Are you sure you want to delete this page?": "Are you sure you want to delete this page?",
   "Are you sure you want to remove this user from the group? The user will lose access to resources this group has access to.": "Are you sure you want to remove this user from the group? The user will lose access to resources this group has access to.",
   "Are you sure you want to remove this user from the space? The user will lose all access to this space.": "Are you sure you want to remove this user from the space? The user will lose all access to this space.",
   "Are you sure you want to restore this version? Any changes not versioned will be lost.": "Are you sure you want to restore this version? Any changes not versioned will be lost.",
+  "Are you sure you want to revoke \"{{name}}\"? Any client using this key will immediately lose access. This cannot be undone.": "Are you sure you want to revoke \"{{name}}\"? Any client using this key will immediately lose access. This cannot be undone.",
+  "Author": "Author",
   "Can become members of groups and spaces in workspace": "Can become members of groups and spaces in workspace",
   "Can create and edit pages in space.": "Can create and edit pages in space.",
   "Can edit": "Can edit",
@@ -33,7 +41,9 @@
   "Confirm": "Confirm",
   "Copy as Markdown": "Copy as Markdown",
   "Copy link": "Copy link",
+  "Copy your API key now and store it somewhere safe. For security reasons it will not be shown again.": "Copy your API key now and store it somewhere safe. For security reasons it will not be shown again.",
   "Create": "Create",
+  "Create API key": "Create API key",
   "Create group": "Create group",
   "Create page": "Create page",
   "Create space": "Create space",
@@ -55,7 +65,14 @@
   "e.g Sales": "e.g Sales",
   "e.g Space for product team": "e.g Space for product team",
   "e.g Space for sales team to collaborate": "e.g Space for sales team to collaborate",
+  "e.g. CI deploy token": "e.g. CI deploy token",
   "Edit": "Edit",
+  "Expiring soon": "Expiring soon",
+  "Failed to create API key": "Failed to create API key",
+  "Failed to load API keys.": "Failed to load API keys.",
+  "Failed to revoke API key": "Failed to revoke API key",
+  "Never used": "Never used",
+  "No API keys yet": "No API keys yet",
   "Read": "Read",
   "Edit group": "Edit group",
   "Email": "Email",
@@ -134,6 +151,8 @@
   "page": "page",
   "Page deleted successfully": "Page deleted successfully",
   "Page history": "Page history",
+  "Revoke API key": "Revoke API key",
+  "Revoke {{name}}": "Revoke {{name}}",
   "Select version": "Select version",
   "Highlight changes": "Highlight changes",
   "Page import is in progress. Please do not close this tab.": "Page import is in progress. Please do not close this tab.",
@@ -189,6 +208,9 @@
   "Template": "Template",
   "Templates": "Templates",
   "Theme": "Theme",
+  "This key expires within 30 days": "This key expires within 30 days",
+  "This key has expired": "This key has expired",
+  "This key never expires": "This key never expires",
   "To change your email, you have to enter your password and new email.": "To change your email, you have to enter your password and new email.",
   "Toggle full page width": "Toggle full page width",
   "Unable to import pages. Please try again.": "Unable to import pages. Please try again.",
@@ -196,6 +218,7 @@
   "Untitled": "Untitled",
   "Updated successfully": "Updated successfully",
   "User": "User",
+  "Within the last hour": "Within the last hour",
   "Workspace": "Workspace",
   "Workspace Name": "Workspace Name",
   "Workspace settings": "Workspace settings",
@@ -426,6 +449,7 @@
   "Write anything. Enter \"/\" for commands": "Write anything. Enter \"/\" for commands",
   "Write...": "Write...",
   "Column count": "Column count",
+  "Your personal API keys.": "Your personal API keys.",
   "{{count}} Columns": "{{count}} Columns",
   "{{count}} command available_one": "1 command available",
   "{{count}} command available_other": "{{count}} commands available",

apps/client/public/locales/ru-RU/translation.json

@@ -1,4 +1,7 @@
 {
+  "1 year": "1 год",
+  "30 days": "30 дней",
+  "90 days": "90 дней",
   "A new version is available": "Доступна новая версия",
   "Account": "Аккаунт",
   "Active": "Активный",
@@ -10,11 +13,16 @@
   "Add space members": "Добавить участников пространства",
   "Add to favorites": "Добавить в избранное",
   "Admin": "Администратор",
+  "API key created": "API ключ создан",
+  "API key revoked": "API ключ отозван",
+  "API keys across the workspace.": "API ключи всего рабочего пространства.",
   "Are you sure you want to delete this group? Members will lose access to resources this group has access to.": "Вы уверены, что хотите удалить эту группу? Участники потеряют доступ к материалам, к которым у этой группы есть доступ.",
   "Are you sure you want to delete this page?": "Вы уверены, что хотите удалить эту страницу?",
   "Are you sure you want to remove this user from the group? The user will lose access to resources this group has access to.": "Вы уверены, что хотите удалить этого пользователя из группы? Пользователь потеряет доступ к материалам, к которым есть доступ у этой группы.",
   "Are you sure you want to remove this user from the space? The user will lose all access to this space.": "Вы уверены, что хотите удалить этого пользователя из пространства? Пользователь потеряет весь доступ к этому пространству.",
   "Are you sure you want to restore this version? Any changes not versioned will be lost.": "Вы уверены, что хотите восстановить эту версию? Все не зафиксированные изменения будут потеряны.",
+  "Are you sure you want to revoke \"{{name}}\"? Any client using this key will immediately lose access. This cannot be undone.": "Вы уверены, что хотите отозвать «{{name}}»? Любой клиент, использующий этот ключ, немедленно потеряет доступ. Это действие нельзя отменить.",
+  "Author": "Автор",
   "Can become members of groups and spaces in workspace": "Могут становиться участниками групп и пространств в рабочей области",
   "Can create and edit pages in space.": "Может создавать и редактировать страницы в пространстве.",
   "Can edit": "Может изменять",
@@ -33,7 +41,9 @@
   "Confirm": "Подтвердить",
   "Copy as Markdown": "Копировать как Markdown",
   "Copy link": "Копировать ссылку",
+  "Copy your API key now and store it somewhere safe. For security reasons it will not be shown again.": "Скопируйте API ключ сейчас и сохраните его в надёжном месте. В целях безопасности он больше не будет показан.",
   "Create": "Создать",
+  "Create API key": "Создать API ключ",
   "Create group": "Создать группу",
   "Create page": "Создать страницу",
   "Create space": "Создать пространство",
@@ -46,6 +56,7 @@
   "Are you sure you want to delete this page? This will delete its children and page history. This action is irreversible.": "Вы уверены, что хотите удалить эту страницу? Это удалит её дочерние страницы, а также историю страницы. Это действие необратимо.",
   "Description": "Описание",
   "Details": "Подробности",
+  "Done": "Готово",
   "e.g ACME": "например, ACME",
   "e.g ACME Inc": "например, ACME Inc",
   "e.g Developers": "например, Developers",
@@ -55,7 +66,15 @@
   "e.g Sales": "например, Sales",
   "e.g Space for product team": "например, Пространство для команды продукта",
   "e.g Space for sales team to collaborate": "например, Пространство для совместной работы команды продаж",
+  "e.g. CI deploy token": "например, токен деплоя CI",
   "Edit": "Редактировать",
+  "Expiring soon": "Скоро истекает",
+  "Failed to create API key": "Не удалось создать API ключ",
+  "Failed to load API keys.": "Не удалось загрузить API ключи.",
+  "Failed to revoke API key": "Не удалось отозвать API ключ",
+  "Name is required": "Имя обязательно",
+  "Never used": "Не использовался",
+  "No API keys yet": "Пока нет API ключей",
   "Read": "Чтение",
   "Edit group": "Редактировать группу",
   "Email": "Электронная почта",
@@ -134,6 +153,8 @@
   "page": "страница",
   "Page deleted successfully": "Страница успешно удалена",
   "Page history": "История страницы",
+  "Revoke API key": "Отозвать API ключ",
+  "Revoke {{name}}": "Отозвать {{name}}",
   "Select version": "Выбрать версию",
   "Highlight changes": "Выделить изменения",
   "Page import is in progress. Please do not close this tab.": "Импорт страницы в процессе. Пожалуйста, не закрывайте эту вкладку.",
@@ -189,6 +210,9 @@
   "Template": "Шаблон",
   "Templates": "Шаблоны",
   "Theme": "Тема",
+  "This key expires within 30 days": "Этот ключ истекает в течение 30 дней",
+  "This key has expired": "Этот ключ истек",
+  "This key never expires": "Этот ключ никогда не истекает",
   "To change your email, you have to enter your password and new email.": "Чтобы изменить электронную почту, вам нужно ввести пароль и новый адрес.",
   "Toggle full page width": "Переключить полную ширину страницы",
   "Unable to import pages. Please try again.": "Не удалось импортировать страницы. Пожалуйста, попробуйте ещё раз.",
@@ -196,6 +220,7 @@
   "Untitled": "Без названия",
   "Updated successfully": "Успешно обновлено",
   "User": "Пользователь",
+  "Within the last hour": "За последний час",
   "Workspace": "Рабочее пространство",
   "Workspace Name": "Название рабочего пространства",
   "Workspace settings": "Настройки рабочего пространства",
@@ -432,6 +457,7 @@
   "Write anything. Enter \"/\" for commands": "Пишите что угодно. Введите \"/\" для команд",
   "Write...": "Напишите...",
   "Column count": "Количество столбцов",
+  "Your personal API keys.": "Ваши личные API ключи.",
   "{{count}} Columns": "{count, plural, one{# столбец} few{# столбца} many{# столбцов} other{# столбца}}",
   "{{count}} command available_one": "Доступна 1 команда",
   "{{count}} command available_other": "Доступно {{count}} команд",

apps/client/src/App.tsx

@@ -44,6 +44,12 @@ const AccountSettings = lazy(
 const AccountPreferences = lazy(
   () => import("@/pages/settings/account/account-preferences.tsx"),
 );
+// #506 — lazy leaf (own chunk): the API-keys management page is route-split so
+// its code (Mantine table/modals + the create/revoke flow) stays out of the
+// entry bundle (post-#342 bundle discipline).
+const AccountApiKeys = lazy(
+  () => import("@/pages/settings/account/account-api-keys.tsx"),
+);
 const WorkspaceSettings = lazy(
   () => import("@/pages/settings/workspace/workspace-settings"),
 );
@@ -105,6 +111,7 @@ export default function App() {
               path={"account/preferences"}
               element={<AccountPreferences />}
             />
+            <Route path={"account/api-keys"} element={<AccountApiKeys />} />
             <Route path={"workspace"} element={<WorkspaceSettings />} />
             <Route path={"ai"} element={<AiSettings />} />
             <Route path={"members"} element={<WorkspaceMembers />} />

apps/client/src/components/settings/settings-sidebar.tsx

@@ -10,6 +10,7 @@ import {
   IconBrush,
   IconWorld,
   IconSparkles,
+  IconKey,
 } from "@tabler/icons-react";
 import { Link, useLocation } from "react-router-dom";
 import classes from "./settings.module.css";
@@ -46,6 +47,11 @@ const groupedData: DataGroup[] = [
         icon: IconBrush,
         path: "/settings/account/preferences",
       },
+      {
+        label: "API keys",
+        icon: IconKey,
+        path: "/settings/account/api-keys",
+      },
     ],
   },
   {

apps/client/src/features/api-key/components/api-keys-manager.test.tsx

@@ -0,0 +1,234 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import {
+  render,
+  screen,
+  fireEvent,
+  waitFor,
+  within,
+} from "@testing-library/react";
+import { MantineProvider } from "@mantine/core";
+import { ModalsProvider } from "@mantine/modals";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { Provider, createStore } from "jotai";
+import { UserRole } from "@/lib/types";
+import { currentUserAtom } from "@/features/user/atoms/current-user-atom";
+import { IApiKey } from "@/features/api-key/types/api-key.types";
+
+// Mock the service layer so no real HTTP is attempted; every test drives the
+// component through these three functions.
+vi.mock("@/features/api-key/services/api-key-service", () => ({
+  getApiKeys: vi.fn(),
+  createApiKey: vi.fn(),
+  revokeApiKey: vi.fn(),
+}));
+
+import {
+  getApiKeys,
+  createApiKey,
+  revokeApiKey,
+} from "@/features/api-key/services/api-key-service";
+import ApiKeysManager from "./api-keys-manager";
+
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
+
+const ISO_SOON = new Date(Date.now() + 10 * 864e5).toISOString();
+const ISO_FAR = new Date(Date.now() + 200 * 864e5).toISOString();
+const ISO_EXPIRED = new Date(Date.now() - 3 * 864e5).toISOString();
+
+// Dump the storage stub via the Web Storage API — its data lives in a closure
+// (see vitest.setup.ts), so JSON.stringify(localStorage) would be vacuous.
+function storageDump(): string {
+  let out = "";
+  for (let i = 0; i < localStorage.length; i++) {
+    const k = localStorage.key(i) as string;
+    out += `${k}=${localStorage.getItem(k)};`;
+  }
+  return out;
+}
+
+function makeKey(overrides: Partial<IApiKey> = {}): IApiKey {
+  return {
+    id: "key-1",
+    name: "CI token",
+    expiresAt: ISO_FAR,
+    lastUsedAt: null,
+    createdAt: "2026-01-01T00:00:00.000Z",
+    creator: { id: "u1", name: "Alice", email: "a@x.io", avatarUrl: null },
+    ...overrides,
+  };
+}
+
+function renderManager(role: UserRole) {
+  const store = createStore();
+  store.set(currentUserAtom, {
+    user: { id: "me", role } as never,
+    workspace: {} as never,
+  });
+  const queryClient = new QueryClient({
+    defaultOptions: { queries: { retry: false } },
+  });
+  const utils = render(
+    <Provider store={store}>
+      <QueryClientProvider client={queryClient}>
+        <MantineProvider>
+          <ModalsProvider>
+            <ApiKeysManager />
+          </ModalsProvider>
+        </MantineProvider>
+      </QueryClientProvider>
+    </Provider>,
+  );
+  return { store, queryClient, ...utils };
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  localStorage.clear();
+});
+
+describe("ApiKeysManager — list rendering", () => {
+  it("renders an explicit expiry date and highlights a <30-day key (acceptance #3)", async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([
+      makeKey({ id: "k-soon", name: "Soon key", expiresAt: ISO_SOON }),
+      makeKey({ id: "k-far", name: "Far key", expiresAt: ISO_FAR }),
+    ]);
+
+    renderManager(UserRole.MEMBER);
+
+    await screen.findByText("Soon key");
+    // Explicit dates, not "in N days": the year is rendered verbatim.
+    const soonYear = new Date(ISO_SOON).getFullYear().toString();
+    expect(screen.getAllByText(new RegExp(soonYear)).length).toBeGreaterThan(0);
+    // Exactly one key is inside the 30-day warning window.
+    expect(screen.getAllByText("Expiring soon")).toHaveLength(1);
+  });
+
+  it('shows "Expired" (not "Expiring soon") for an already-expired key', async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([
+      makeKey({ id: "k-dead", name: "Dead key", expiresAt: ISO_EXPIRED }),
+    ]);
+    renderManager(UserRole.MEMBER);
+    await screen.findByText("Dead key");
+    // A past expiry is labelled "Expired", never the forward-looking badge.
+    expect(screen.getByText("Expired")).toBeDefined();
+    expect(screen.queryByText("Expiring soon")).toBeNull();
+  });
+
+  it('shows "Never" for an unlimited key and no highlight', async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([
+      makeKey({ id: "k-forever", name: "Forever", expiresAt: null }),
+    ]);
+    renderManager(UserRole.MEMBER);
+    await screen.findByText("Forever");
+    expect(screen.getByText("Never")).toBeDefined();
+    expect(screen.queryByText("Expiring soon")).toBeNull();
+  });
+
+  it("empty list shows the empty state", async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([]);
+    renderManager(UserRole.MEMBER);
+    expect(await screen.findByText("No API keys yet")).toBeDefined();
+  });
+});
+
+describe("ApiKeysManager — admin vs member view (acceptance #6)", () => {
+  it("a member does NOT see the author column", async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([
+      makeKey({ creator: { id: "me", name: "Me", email: "m@x.io", avatarUrl: null } }),
+    ]);
+    renderManager(UserRole.MEMBER);
+    await screen.findByText("CI token");
+    // Author header absent + creator name not rendered (no author column).
+    expect(screen.queryByText("Author")).toBeNull();
+    expect(screen.queryByText("Me")).toBeNull();
+  });
+
+  it("an admin sees the author column with the creator's name", async () => {
+    vi.mocked(getApiKeys).mockResolvedValue([
+      makeKey({ creator: { id: "u1", name: "Alice", email: "a@x.io", avatarUrl: null } }),
+    ]);
+    renderManager(UserRole.ADMIN);
+    await screen.findByText("CI token");
+    expect(screen.getByText("Author")).toBeDefined();
+    expect(screen.getByText("Alice")).toBeDefined();
+  });
+});
+
+describe("ApiKeysManager — revoke (acceptance #4)", () => {
+  it("revoke removes the row from the list", async () => {
+    vi.mocked(getApiKeys)
+      .mockResolvedValueOnce([
+        makeKey({ id: "k1", name: "Doomed" }),
+        makeKey({ id: "k2", name: "Survivor" }),
+      ])
+      // After revoke, invalidation refetches the reduced list.
+      .mockResolvedValue([makeKey({ id: "k2", name: "Survivor" })]);
+    vi.mocked(revokeApiKey).mockResolvedValue();
+
+    renderManager(UserRole.MEMBER);
+    await screen.findByText("Doomed");
+
+    fireEvent.click(screen.getByLabelText("Revoke Doomed"));
+    // Confirm modal → click the destructive confirm button.
+    const confirm = await screen.findByRole("button", { name: "Revoke" });
+    fireEvent.click(confirm);
+
+    await waitFor(() =>
+      expect(screen.queryByText("Doomed")).toBeNull(),
+    );
+    expect(screen.getByText("Survivor")).toBeDefined();
+    expect(revokeApiKey).toHaveBeenCalledWith("k1");
+  });
+});
+
+describe("ApiKeysManager — show-once token (acceptance #1 & #2)", () => {
+  it("shows the token once, then discards it from the UI, localStorage and query cache", async () => {
+    const SECRET = "gm_secret-token-value-xyz";
+    vi.mocked(getApiKeys).mockResolvedValue([]);
+    vi.mocked(createApiKey).mockResolvedValue({
+      token: SECRET,
+      apiKey: {
+        id: "new-1",
+        name: "My key",
+        expiresAt: ISO_FAR,
+        createdAt: new Date().toISOString(),
+      },
+    });
+
+    const { queryClient } = renderManager(UserRole.MEMBER);
+    await screen.findByText("No API keys yet");
+
+    // Open create modal (use the header CTA), fill the name, submit.
+    fireEvent.click(
+      screen.getAllByRole("button", { name: "Create API key" })[0],
+    );
+    const nameInput = await screen.findByLabelText(/Name/);
+    fireEvent.change(nameInput, { target: { value: "My key" } });
+    fireEvent.click(screen.getByRole("button", { name: "Create" }));
+
+    // Token is shown exactly once in the show-once modal.
+    const tokenEl = await screen.findByTestId("api-key-token");
+    expect(tokenEl.textContent).toBe(SECRET);
+
+    // Close the modal → token discarded from the DOM.
+    fireEvent.click(screen.getByRole("button", { name: "Done" }));
+    await waitFor(() =>
+      expect(screen.queryByTestId("api-key-token")).toBeNull(),
+    );
+
+    // Acceptance #2: the secret is nowhere in localStorage or the react-query
+    // caches (query cache never carried it; the mutation copy was reset()).
+    // Non-vacuous: currentUser IS in storage, so the dump is exercised.
+    const dump = storageDump();
+    expect(dump).toContain("currentUser");
+    expect(dump).not.toContain(SECRET);
+    const cacheDump = JSON.stringify(
+      queryClient.getQueryCache().getAll().map((q) => q.state.data),
+    );
+    expect(cacheDump).not.toContain(SECRET);
+    const mutationDump = JSON.stringify(
+      queryClient.getMutationCache().getAll().map((m) => m.state.data),
+    );
+    expect(mutationDump).not.toContain(SECRET);
+  });
+});

apps/client/src/features/api-key/components/api-keys-manager.tsx

@@ -0,0 +1,264 @@
+import { useState } from "react";
+import {
+  ActionIcon,
+  Badge,
+  Button,
+  Center,
+  Group,
+  Loader,
+  Stack,
+  Table,
+  Text,
+  Tooltip,
+} from "@mantine/core";
+import { modals } from "@mantine/modals";
+import { notifications } from "@mantine/notifications";
+import { IconAlertTriangle, IconKey, IconTrash } from "@tabler/icons-react";
+import { useTranslation } from "react-i18next";
+import useUserRole from "@/hooks/use-user-role.tsx";
+import { formatLocalized, useDateFnsLocale } from "@/lib/date-locale";
+import { timeAgo } from "@/lib/time";
+import {
+  useApiKeysQuery,
+  useCreateApiKeyMutation,
+  useRevokeApiKeyMutation,
+} from "@/features/api-key/queries/api-key-query";
+import {
+  IApiKey,
+  ICreateApiKeyResponse,
+} from "@/features/api-key/types/api-key.types";
+import {
+  isExpired,
+  isExpiringSoon,
+  lastUsedBucket,
+} from "@/features/api-key/utils";
+import { CreateApiKeyModal } from "./create-api-key-modal";
+import { ShowTokenModal } from "./show-token-modal";
+
+export default function ApiKeysManager() {
+  const { t } = useTranslation();
+  const locale = useDateFnsLocale();
+  // Manage-on-API === Owner/Admin server-side, so the admin (workspace-wide)
+  // list + "author" column mirror exactly the roles the server serves the
+  // whole-workspace response to.
+  const { isAdmin } = useUserRole();
+
+  const { data: keys, isLoading, isError } = useApiKeysQuery();
+  const createMutation = useCreateApiKeyMutation();
+  const revokeMutation = useRevokeApiKeyMutation();
+
+  const [createOpened, setCreateOpened] = useState(false);
+  // SECURITY: the show-once token lives ONLY here, in this component's local
+  // state. It is never written to localStorage, the query cache or a log. Closing
+  // the modal sets it back to null (handleCloseToken) — discarded forever.
+  const [createdKey, setCreatedKey] = useState<ICreateApiKeyResponse | null>(
+    null,
+  );
+
+  const handleCreate = async (values: {
+    name: string;
+    expiresAt: string | null;
+  }): Promise<boolean> => {
+    try {
+      const res = await createMutation.mutateAsync(values);
+      setCreateOpened(false);
+      // Move the token into local state, then immediately purge react-query's
+      // own copy of the mutation result so the secret does not linger in the
+      // mutation cache.
+      setCreatedKey(res);
+      createMutation.reset();
+      return true;
+    } catch {
+      notifications.show({
+        message: t("Failed to create API key"),
+        color: "red",
+      });
+      return false;
+    }
+  };
+
+  const handleCloseToken = () => {
+    // Token discarded — the only copy the UI ever held is dropped here.
+    setCreatedKey(null);
+  };
+
+  const openRevokeModal = (key: IApiKey) =>
+    modals.openConfirmModal({
+      title: t("Revoke API key"),
+      centered: true,
+      children: (
+        <Text size="sm">
+          {t(
+            'Are you sure you want to revoke "{{name}}"? Any client using this key will immediately lose access. This cannot be undone.',
+            { name: key.name },
+          )}
+        </Text>
+      ),
+      labels: { confirm: t("Revoke"), cancel: t("Cancel") },
+      confirmProps: { color: "red" },
+      onConfirm: () => revokeMutation.mutate(key.id),
+    });
+
+  const formatDate = (iso: string) =>
+    formatLocalized(new Date(iso), "MMM dd, yyyy", "PP", locale);
+
+  const renderLastUsed = (lastUsedAt: string | null) => {
+    switch (lastUsedBucket(lastUsedAt)) {
+      case "never":
+        return t("Never used");
+      case "recent":
+        return t("Within the last hour");
+      case "stale":
+        // Coarse relative time — last_used_at is throttled to ~1h server-side,
+        // so we don't promise finer precision.
+        return timeAgo(new Date(lastUsedAt as string));
+    }
+  };
+
+  if (isLoading) {
+    return (
+      <Center py="xl">
+        <Loader size="sm" />
+      </Center>
+    );
+  }
+
+  const rows = (keys ?? []).map((key) => {
+    // Mutually exclusive: an already-expired key is labelled "Expired" (a past
+    // expiry) rather than the forward-looking "Expiring soon". isExpiringSoon
+    // also matches past expiries, so gate "soon" on !expired.
+    const expired = isExpired(key.expiresAt);
+    const soon = !expired && isExpiringSoon(key.expiresAt);
+    return (
+      <Table.Tr key={key.id}>
+        <Table.Td>
+          <Text fw={500}>{key.name}</Text>
+        </Table.Td>
+        <Table.Td>{formatDate(key.createdAt)}</Table.Td>
+        <Table.Td>
+          {key.expiresAt ? (
+            <Group gap={6} wrap="nowrap">
+              <Text size="sm">{formatDate(key.expiresAt)}</Text>
+              {expired && (
+                <Tooltip label={t("This key has expired")} withArrow>
+                  <Badge
+                    color="red"
+                    variant="light"
+                    size="sm"
+                    leftSection={<IconAlertTriangle size={12} />}
+                  >
+                    {t("Expired")}
+                  </Badge>
+                </Tooltip>
+              )}
+              {soon && (
+                <Tooltip
+                  label={t("This key expires within 30 days")}
+                  withArrow
+                >
+                  <Badge
+                    color="orange"
+                    variant="light"
+                    size="sm"
+                    leftSection={<IconAlertTriangle size={12} />}
+                  >
+                    {t("Expiring soon")}
+                  </Badge>
+                </Tooltip>
+              )}
+            </Group>
+          ) : (
+            <Text size="sm" c="dimmed">
+              {t("Never")}
+            </Text>
+          )}
+        </Table.Td>
+        <Table.Td>
+          <Text size="sm" c="dimmed">
+            {renderLastUsed(key.lastUsedAt)}
+          </Text>
+        </Table.Td>
+        {isAdmin && (
+          <Table.Td>
+            <Text size="sm">
+              {key.creator?.name ?? key.creator?.email ?? t("Unknown")}
+            </Text>
+          </Table.Td>
+        )}
+        <Table.Td style={{ textAlign: "right" }}>
+          <Tooltip label={t("Revoke")} withArrow>
+            <ActionIcon
+              variant="subtle"
+              color="red"
+              aria-label={t("Revoke {{name}}", { name: key.name })}
+              onClick={() => openRevokeModal(key)}
+            >
+              <IconTrash size={16} />
+            </ActionIcon>
+          </Tooltip>
+        </Table.Td>
+      </Table.Tr>
+    );
+  });
+
+  return (
+    <>
+      <Group justify="space-between" mb="md">
+        <Text size="sm" c="dimmed">
+          {isAdmin
+            ? t("API keys across the workspace.")
+            : t("Your personal API keys.")}
+        </Text>
+        <Button
+          leftSection={<IconKey size={16} />}
+          onClick={() => setCreateOpened(true)}
+        >
+          {t("Create API key")}
+        </Button>
+      </Group>
+
+      {isError ? (
+        <Text c="red" size="sm">
+          {t("Failed to load API keys.")}
+        </Text>
+      ) : rows.length === 0 ? (
+        <Stack align="center" gap="xs" py="xl">
+          <IconKey size={32} opacity={0.4} />
+          <Text c="dimmed">{t("No API keys yet")}</Text>
+          <Button
+            variant="light"
+            leftSection={<IconKey size={16} />}
+            onClick={() => setCreateOpened(true)}
+          >
+            {t("Create API key")}
+          </Button>
+        </Stack>
+      ) : (
+        <Table.ScrollContainer minWidth={600}>
+          <Table verticalSpacing="sm" highlightOnHover>
+            <Table.Thead>
+              <Table.Tr>
+                <Table.Th>{t("Name")}</Table.Th>
+                <Table.Th>{t("Created")}</Table.Th>
+                <Table.Th>{t("Expires")}</Table.Th>
+                <Table.Th>{t("Last used")}</Table.Th>
+                {isAdmin && <Table.Th>{t("Author")}</Table.Th>}
+                <Table.Th />
+              </Table.Tr>
+            </Table.Thead>
+            <Table.Tbody>{rows}</Table.Tbody>
+          </Table>
+        </Table.ScrollContainer>
+      )}
+
+      <CreateApiKeyModal
+        opened={createOpened}
+        onClose={() => setCreateOpened(false)}
+        onSubmit={handleCreate}
+        loading={createMutation.isPending}
+      />
+
+      <ShowTokenModal created={createdKey} onClose={handleCloseToken} />
+    </>
+  );
+}

apps/client/src/features/api-key/components/create-api-key-modal.tsx

@@ -0,0 +1,104 @@
+import { Button, Group, Modal, Select, Stack, TextInput } from "@mantine/core";
+import { useForm } from "@mantine/form";
+import { useTranslation } from "react-i18next";
+import {
+  ApiKeyLifetime,
+  DEFAULT_LIFETIME,
+  lifetimeToExpiresAt,
+} from "@/features/api-key/utils";
+
+interface Props {
+  opened: boolean;
+  onClose: () => void;
+  // Resolves the create request, returning true on success. The parent owns the
+  // mutation (and the token it returns); this modal only collects the name +
+  // lifetime. On failure (false) the form state is kept so the user can retry.
+  onSubmit: (values: {
+    name: string;
+    expiresAt: string | null;
+  }) => Promise<boolean>;
+  loading?: boolean;
+}
+
+interface FormValues {
+  name: string;
+  lifetime: ApiKeyLifetime;
+}
+
+export function CreateApiKeyModal({
+  opened,
+  onClose,
+  onSubmit,
+  loading,
+}: Props) {
+  const { t } = useTranslation();
+
+  const form = useForm<FormValues>({
+    initialValues: {
+      name: "",
+      lifetime: DEFAULT_LIFETIME,
+    },
+    validate: {
+      name: (value) =>
+        value.trim().length === 0 ? t("Name is required") : null,
+    },
+  });
+
+  const lifetimeOptions: { value: ApiKeyLifetime; label: string }[] = [
+    { value: "30d", label: t("30 days") },
+    { value: "90d", label: t("90 days") },
+    { value: "1y", label: t("1 year") },
+    { value: "never", label: t("No expiration") },
+  ];
+
+  const handleSubmit = form.onSubmit(async (values) => {
+    const ok = await onSubmit({
+      name: values.name.trim(),
+      expiresAt: lifetimeToExpiresAt(values.lifetime),
+    });
+    // Reset only after a successful submit so a failed create keeps the form
+    // state (the parent surfaces the error via a notification).
+    if (ok) form.reset();
+  });
+
+  const handleClose = () => {
+    form.reset();
+    onClose();
+  };
+
+  return (
+    <Modal
+      opened={opened}
+      onClose={handleClose}
+      title={t("Create API key")}
+      centered
+    >
+      <form onSubmit={handleSubmit}>
+        <Stack gap="sm">
+          <TextInput
+            label={t("Name")}
+            placeholder={t("e.g. CI deploy token")}
+            data-autofocus
+            withAsterisk
+            {...form.getInputProps("name")}
+          />
+          <Select
+            label={t("Expiration")}
+            data={lifetimeOptions}
+            allowDeselect={false}
+            checkIconPosition="right"
+            {...form.getInputProps("lifetime")}
+          />
+          <Group justify="flex-end" mt="xs">
+            <Button variant="default" onClick={handleClose} type="button">
+              {t("Cancel")}
+            </Button>
+            <Button type="submit" loading={loading}>
+              {t("Create")}
+            </Button>
+          </Group>
+        </Stack>
+      </form>
+    </Modal>
+  );
+}

apps/client/src/features/api-key/components/show-token-modal.tsx

@@ -0,0 +1,107 @@
+import {
+  Alert,
+  Button,
+  Code,
+  Group,
+  Modal,
+  Stack,
+  Text,
+} from "@mantine/core";
+import { IconAlertTriangle, IconCheck, IconCopy } from "@tabler/icons-react";
+import { useTranslation } from "react-i18next";
+import { CopyButton } from "@/components/common/copy-button";
+import { formatLocalized, useDateFnsLocale } from "@/lib/date-locale";
+import { ICreateApiKeyResponse } from "@/features/api-key/types/api-key.types";
+
+interface Props {
+  // The freshly-created key incl. its token. Owned by the parent; this modal
+  // only renders it and never copies it into its own persistent state.
+  created: ICreateApiKeyResponse | null;
+  // Closing MUST discard the token in the parent (set the `created` prop back to
+  // null) — the token is shown exactly once.
+  onClose: () => void;
+}
+
+export function ShowTokenModal({ created, onClose }: Props) {
+  const { t } = useTranslation();
+  const locale = useDateFnsLocale();
+
+  const expiresAt = created?.apiKey.expiresAt ?? null;
+
+  return (
+    <Modal
+      opened={created !== null}
+      onClose={onClose}
+      title={t("API key created")}
+      centered
+      // No dismiss-on-outside-click: the token is irretrievable, so closing is a
+      // deliberate act (the user confirms they have saved it).
+      closeOnClickOutside={false}
+    >
+      {created && (
+        <Stack gap="sm">
+          <Alert
+            color="orange"
+            icon={<IconAlertTriangle size={18} />}
+            variant="light"
+          >
+            {t(
+              "Copy your API key now and store it somewhere safe. For security reasons it will not be shown again.",
+            )}
+          </Alert>
+
+          <div>
+            <Text size="sm" c="dimmed" mb={4}>
+              {t("Token")}
+            </Text>
+            <Group gap="xs" wrap="nowrap" align="flex-start">
+              <Code
+                block
+                data-testid="api-key-token"
+                style={{ flex: 1, wordBreak: "break-all" }}
+              >
+                {created.token}
+              </Code>
+              <CopyButton value={created.token}>
+                {({ copied, copy }) => (
+                  <Button
+                    variant="light"
+                    size="xs"
+                    color={copied ? "teal" : "blue"}
+                    leftSection={
+                      copied ? (
+                        <IconCheck size={16} />
+                      ) : (
+                        <IconCopy size={16} />
+                      )
+                    }
+                    onClick={copy}
+                  >
+                    {copied ? t("Copied") : t("Copy")}
+                  </Button>
+                )}
+              </CopyButton>
+            </Group>
+          </div>
+
+          <Text size="sm" c="dimmed">
+            {expiresAt
+              ? t("Expires {{date}}", {
+                  date: formatLocalized(
+                    new Date(expiresAt),
+                    "MMM dd, yyyy",
+                    "PP",
+                    locale,
+                  ),
+                })
+              : t("This key never expires")}
+          </Text>
+
+          <Group justify="flex-end" mt="xs">
+            <Button onClick={onClose}>{t("Done")}</Button>
+          </Group>
+        </Stack>
+      )}
+    </Modal>
+  );
+}

apps/client/src/features/api-key/queries/api-key-query.ts

@@ -0,0 +1,66 @@
+import {
+  useMutation,
+  useQuery,
+  useQueryClient,
+  UseQueryResult,
+} from "@tanstack/react-query";
+import { notifications } from "@mantine/notifications";
+import { useTranslation } from "react-i18next";
+import {
+  createApiKey,
+  getApiKeys,
+  revokeApiKey,
+} from "@/features/api-key/services/api-key-service";
+import {
+  IApiKey,
+  ICreateApiKey,
+  ICreateApiKeyResponse,
+} from "@/features/api-key/types/api-key.types";
+
+export const API_KEYS_QUERY_KEY = ["api-keys"];
+
+export function useApiKeysQuery(): UseQueryResult<IApiKey[], Error> {
+  return useQuery({
+    queryKey: API_KEYS_QUERY_KEY,
+    queryFn: () => getApiKeys(),
+  });
+}
+
+/**
+ * Create mutation.
+ *
+ * SECURITY: the response contains the token exactly once. This hook deliberately
+ * does NOT stash it anywhere — the caller reads it from `mutateAsync`'s resolved
+ * value, moves it into the show-once modal's local state, then calls
+ * `mutation.reset()` to purge react-query's own copy immediately. `gcTime: 0`
+ * is a second belt so nothing lingers in the mutation cache after the observer
+ * unmounts. The list is invalidated here (the list carries no token).
+ */
+export function useCreateApiKeyMutation() {
+  const queryClient = useQueryClient();
+  return useMutation<ICreateApiKeyResponse, Error, ICreateApiKey>({
+    mutationFn: (data) => createApiKey(data),
+    gcTime: 0,
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: API_KEYS_QUERY_KEY });
+    },
+  });
+}
+
+export function useRevokeApiKeyMutation() {
+  const { t } = useTranslation();
+  const queryClient = useQueryClient();
+  return useMutation<void, Error, string>({
+    mutationFn: (id) => revokeApiKey(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: API_KEYS_QUERY_KEY });
+      notifications.show({ message: t("API key revoked") });
+    },
+    onError: () => {
+      notifications.show({
+        message: t("Failed to revoke API key"),
+        color: "red",
+      });
+    },
+  });
+}

apps/client/src/features/api-key/services/api-key-service.test.ts

@@ -0,0 +1,78 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+
+// Mock the api-client (axios instance). vi.mock replaces the whole module, so
+// the real response interceptor — which returns `response.data`, i.e. the
+// server envelope { data, success, status } — is bypassed. Our mocked post/get
+// therefore resolve to that post-interceptor envelope shape directly, and the
+// service under test reads `.data` off it to unwrap the inner payload. This is
+// the one bug-prone line the component tests (which fully mock the service)
+// never exercise.
+const { post, get } = vi.hoisted(() => ({ post: vi.fn(), get: vi.fn() }));
+vi.mock("@/lib/api-client", () => ({
+  default: { post, get },
+}));
+
+import {
+  createApiKey,
+  getApiKeys,
+} from "@/features/api-key/services/api-key-service";
+
+beforeEach(() => {
+  vi.clearAllMocks();
+});
+
+describe("api-key-service response-contract unwrap", () => {
+  it("createApiKey unwraps the envelope to { token, apiKey }", async () => {
+    const payload = {
+      token: "gm_secret-abc",
+      apiKey: {
+        id: "key-1",
+        name: "CI token",
+        expiresAt: "2027-07-11T12:00:00.000Z",
+        createdAt: "2026-07-11T12:00:00.000Z",
+      },
+    };
+    // The server envelope as the interceptor hands it to the service.
+    post.mockResolvedValue({ data: payload, success: true, status: 200 });
+
+    const result = await createApiKey({
+      name: "CI token",
+      expiresAt: "2027-07-11T12:00:00.000Z",
+    });
+
+    // The inner payload only — not the { data, success, status } wrapper.
+    expect(result).toEqual(payload);
+    expect(result.token).toBe("gm_secret-abc");
+    expect(result.apiKey).toEqual(payload.apiKey);
+    expect(post).toHaveBeenCalledWith("/api-keys/create", {
+      name: "CI token",
+      expiresAt: "2027-07-11T12:00:00.000Z",
+    });
+  });
+
+  it("getApiKeys unwraps the envelope to the array of rows", async () => {
+    const rows = [
+      {
+        id: "key-1",
+        name: "CI token",
+        expiresAt: null,
+        lastUsedAt: null,
+        createdAt: "2026-01-01T00:00:00.000Z",
+      },
+      {
+        id: "key-2",
+        name: "Deploy token",
+        expiresAt: "2027-01-01T00:00:00.000Z",
+        lastUsedAt: null,
+        createdAt: "2026-02-01T00:00:00.000Z",
+      },
+    ];
+    post.mockResolvedValue({ data: rows, success: true, status: 200 });
+
+    const result = await getApiKeys();
+
+    expect(result).toEqual(rows);
+    expect(result).toHaveLength(2);
+    expect(post).toHaveBeenCalledWith("/api-keys/list");
+  });
+});

apps/client/src/features/api-key/services/api-key-service.ts

@@ -0,0 +1,30 @@
+import api from "@/lib/api-client";
+import {
+  IApiKey,
+  ICreateApiKey,
+  ICreateApiKeyResponse,
+} from "@/features/api-key/types/api-key.types";
+
+// Mint a new key. The response carries the token ONCE — the caller must move it
+// straight into the show-once modal's local state and never cache it. See
+// queries/api-key-query.ts (gcTime: 0 + query invalidation) and
+// components/api-keys-manager.tsx `handleCreate` (createMutation.reset() right
+// after reading the token) for the reset()-after-read pattern.
+export async function createApiKey(
+  data: ICreateApiKey,
+): Promise<ICreateApiKeyResponse> {
+  const res = await api.post<ICreateApiKeyResponse>("/api-keys/create", data);
+  return res.data as ICreateApiKeyResponse;
+}
+
+// List the caller's keys (or, for an admin, every key in the workspace with
+// creator attribution). Never returns token material.
+export async function getApiKeys(): Promise<IApiKey[]> {
+  const res = await api.post<IApiKey[]>("/api-keys/list");
+  return res.data as IApiKey[];
+}
+
+// Revocation is server-side immediate; the caller drops the row on success.
+export async function revokeApiKey(id: string): Promise<void> {
+  await api.post("/api-keys/revoke", { id });
+}

apps/client/src/features/api-key/types/api-key.types.ts

@@ -0,0 +1,48 @@
+// Compact creator attribution embedded in the admin (workspace-wide) list. A
+// normal member's list only ever contains their own keys, so the field is
+// present but redundant; the author column is only rendered for admins.
+export interface IApiKeyCreator {
+  id: string;
+  name: string;
+  email: string;
+  avatarUrl: string | null;
+}
+
+// A single api-key row as returned by `POST /api/api-keys/list`. Note: the list
+// NEVER carries token material — only metadata.
+export interface IApiKey {
+  id: string;
+  name: string;
+  // ISO string, or null for an unlimited ("never expires") key.
+  expiresAt: string | null;
+  // ISO string, or null if the key was never used. Throttled to ~1h server-side
+  // (#501), so the UI must not promise sub-hour precision.
+  lastUsedAt: string | null;
+  createdAt: string;
+  creator?: IApiKeyCreator | null;
+}
+
+// Payload for `POST /api/api-keys/create`. `expiresAt`: an ISO date string for a
+// bounded lifetime, or null for an unlimited key. (undefined would let the
+// server apply its 1-year default, but the form always sends an explicit value.)
+export interface ICreateApiKey {
+  name: string;
+  expiresAt: string | null;
+}
+
+// The metadata half of the create response. The token itself is carried
+// separately (see ICreateApiKeyResponse) and is shown exactly once.
+export interface ICreatedApiKey {
+  id: string;
+  name: string;
+  expiresAt: string | null;
+  createdAt: string;
+}
+
+// Response of `POST /api/api-keys/create`. `token` is the ONLY time the secret
+// is ever returned — it must live only in the show-once modal's local state and
+// must never be cached, persisted or logged.
+export interface ICreateApiKeyResponse {
+  token: string;
+  apiKey: ICreatedApiKey;
+}

apps/client/src/features/api-key/utils.test.ts

@@ -0,0 +1,100 @@
+import { describe, it, expect } from "vitest";
+import {
+  DEFAULT_LIFETIME,
+  EXPIRY_WARNING_DAYS,
+  isExpired,
+  isExpiringSoon,
+  lastUsedBucket,
+  lifetimeToExpiresAt,
+} from "./utils";
+
+const NOW = new Date("2026-07-11T12:00:00.000Z");
+const daysFromNow = (n: number) =>
+  new Date(NOW.getTime() + n * 24 * 60 * 60 * 1000).toISOString();
+
+describe("lifetimeToExpiresAt", () => {
+  it("default lifetime is 1 year (acceptance #7)", () => {
+    expect(DEFAULT_LIFETIME).toBe("1y");
+    const iso = lifetimeToExpiresAt("1y", NOW);
+    expect(iso).toBe("2027-07-11T12:00:00.000Z");
+  });
+
+  it('"never" sends null (acceptance #7)', () => {
+    expect(lifetimeToExpiresAt("never", NOW)).toBeNull();
+  });
+
+  it("30d / 90d map to the exact future instant", () => {
+    expect(lifetimeToExpiresAt("30d", NOW)).toBe(daysFromNow(30));
+    expect(lifetimeToExpiresAt("90d", NOW)).toBe(daysFromNow(90));
+  });
+});
+
+describe("isExpiringSoon (acceptance #3 highlight)", () => {
+  it("an unlimited key is never 'soon'", () => {
+    expect(isExpiringSoon(null, NOW)).toBe(false);
+  });
+
+  it("highlights a key expiring within the 30-day window", () => {
+    expect(isExpiringSoon(daysFromNow(EXPIRY_WARNING_DAYS - 1), NOW)).toBe(true);
+    expect(isExpiringSoon(daysFromNow(10), NOW)).toBe(true);
+  });
+
+  it("does not highlight a key well outside the window", () => {
+    expect(isExpiringSoon(daysFromNow(EXPIRY_WARNING_DAYS + 1), NOW)).toBe(
+      false,
+    );
+    expect(isExpiringSoon(daysFromNow(200), NOW)).toBe(false);
+  });
+
+  it("an already-expired key is highlighted", () => {
+    expect(isExpiringSoon(daysFromNow(-3), NOW)).toBe(true);
+  });
+});
+
+describe("isExpired (past vs future expiry)", () => {
+  it("an unlimited key is never expired", () => {
+    expect(isExpired(null, NOW)).toBe(false);
+  });
+
+  it("a past expiry is expired", () => {
+    expect(isExpired(daysFromNow(-3), NOW)).toBe(true);
+    expect(isExpired(daysFromNow(-1), NOW)).toBe(true);
+  });
+
+  it("a future expiry is not expired (even within the warning window)", () => {
+    expect(isExpired(daysFromNow(1), NOW)).toBe(false);
+    expect(isExpired(daysFromNow(EXPIRY_WARNING_DAYS - 1), NOW)).toBe(false);
+    expect(isExpired(daysFromNow(200), NOW)).toBe(false);
+  });
+
+  it("an expiry exactly at 'now' counts as expired (boundary is inclusive)", () => {
+    expect(isExpired(NOW.toISOString(), NOW)).toBe(true);
+  });
+
+  it("is mutually distinguishable from isExpiringSoon: expired vs soon-but-future", () => {
+    // A key 3 days in the past: expired, and (by design) also matches
+    // isExpiringSoon — the UI resolves this by checking isExpired first.
+    expect(isExpired(daysFromNow(-3), NOW)).toBe(true);
+    // A key 10 days in the future: NOT expired, but expiring soon.
+    expect(isExpired(daysFromNow(10), NOW)).toBe(false);
+    expect(isExpiringSoon(daysFromNow(10), NOW)).toBe(true);
+  });
+});
+
+describe("lastUsedBucket (within-the-last-hour semantics)", () => {
+  const minutesAgo = (n: number) =>
+    new Date(NOW.getTime() - n * 60 * 1000).toISOString();
+
+  it("null last-used is 'never'", () => {
+    expect(lastUsedBucket(null, NOW)).toBe("never");
+  });
+
+  it("under an hour is 'recent' (no sub-hour precision promised)", () => {
+    expect(lastUsedBucket(minutesAgo(5), NOW)).toBe("recent");
+    expect(lastUsedBucket(minutesAgo(59), NOW)).toBe("recent");
+  });
+
+  it("over an hour is 'stale'", () => {
+    expect(lastUsedBucket(minutesAgo(90), NOW)).toBe("stale");
+  });
+});

apps/client/src/features/api-key/utils.ts

@@ -0,0 +1,76 @@
+import { addDays, addYears, differenceInMinutes } from "date-fns";
+
+// The single early-warning window (#501/#506): keys whose expiry is closer than
+// this are visually highlighted in the list. Also used to classify a key as
+// already-expired (a negative "days until" is < 30 too).
+export const EXPIRY_WARNING_DAYS = 30;
+
+// last_used_at is throttled to ~1h server-side, so anything under an hour is
+// shown as the coarse "within the last hour" rather than a false-precise
+// "5 minutes ago".
+export const LAST_USED_THROTTLE_MINUTES = 60;
+
+export type ApiKeyLifetime = "30d" | "90d" | "1y" | "never";
+
+export const DEFAULT_LIFETIME: ApiKeyLifetime = "1y";
+
+// Maps a lifetime choice to the `expiresAt` payload sent to the server: an ISO
+// string for a bounded lifetime, or null for an explicit unlimited key.
+export function lifetimeToExpiresAt(
+  lifetime: ApiKeyLifetime,
+  now: Date = new Date(),
+): string | null {
+  switch (lifetime) {
+    case "30d":
+      return addDays(now, 30).toISOString();
+    case "90d":
+      return addDays(now, 90).toISOString();
+    case "1y":
+      return addYears(now, 1).toISOString();
+    case "never":
+      return null;
+  }
+}
+
+// True when a bounded key's expiry is already in the past (or exactly now). An
+// unlimited key (null) is never expired. This is distinct from "expiring soon":
+// the two states are mutually exclusive at the call site (see api-keys-manager),
+// so an already-expired key is labelled "Expired", not "Expiring soon".
+export function isExpired(
+  expiresAt: string | null,
+  now: Date = new Date(),
+): boolean {
+  if (!expiresAt) return false;
+  const expiry = new Date(expiresAt).getTime();
+  if (Number.isNaN(expiry)) return false;
+  return expiry <= now.getTime();
+}
+
+// True when a bounded key expires within the warning window (or is already
+// expired). An unlimited key (null) is never "expiring soon". Callers that need
+// to distinguish an already-past expiry should check isExpired() first, as this
+// predicate deliberately also covers the already-expired case.
+export function isExpiringSoon(
+  expiresAt: string | null,
+  now: Date = new Date(),
+): boolean {
+  if (!expiresAt) return false;
+  const expiry = new Date(expiresAt).getTime();
+  if (Number.isNaN(expiry)) return false;
+  const msLeft = expiry - now.getTime();
+  return msLeft < EXPIRY_WARNING_DAYS * 24 * 60 * 60 * 1000;
+}
+
+// Classifies last-used recency so the caller can pick the honest label without
+// promising sub-hour precision. Returns "never", "recent" (< 1h) or "stale".
+export function lastUsedBucket(
+  lastUsedAt: string | null,
+  now: Date = new Date(),
+): "never" | "recent" | "stale" {
+  if (!lastUsedAt) return "never";
+  const used = new Date(lastUsedAt);
+  if (Number.isNaN(used.getTime())) return "never";
+  return differenceInMinutes(now, used) < LAST_USED_THROTTLE_MINUTES
+    ? "recent"
+    : "stale";
+}

apps/client/src/features/page/queries/page-query.ts

@@ -665,6 +665,13 @@ export function updateCacheOnMovePage(
   pageData: Partial<IPage>,
 ) {
   invalidatePageTree();
+  // Invalidate the moved page's breadcrumbs (#523). The tree-side child-loss
+  // guard removes the moved node from the local tree when its new parent is an
+  // unloaded branch, so `findBreadcrumbPath` misses it and the breadcrumb bar
+  // falls back to the server `["breadcrumbs", pageId]` query — which this move
+  // must invalidate, otherwise the crumbs keep showing the OLD parent until a
+  // refocus/navigation.
+  queryClient.invalidateQueries({ queryKey: ["breadcrumbs", pageId] });
   // Remove page from old parent's cache
   const oldQueryKey =
     oldParentId === null

apps/client/src/features/page/queries/update-cache-on-move.breadcrumbs.test.ts

@@ -0,0 +1,40 @@
+import { describe, it, expect, beforeEach, vi } from "vitest";
+import type { IPage } from "@/features/page/types/page.types";
+
+// A fresh QueryClient stands in for the app singleton (importing the real
+// @/main.tsx would run ReactDOM.createRoot, which has no DOM root in jsdom).
+vi.mock("@/main.tsx", async () => {
+  const { QueryClient } = await import("@tanstack/react-query");
+  return { queryClient: new QueryClient() };
+});
+
+import { queryClient } from "@/main.tsx";
+import { updateCacheOnMovePage } from "./page-query";
+
+// #523: the tree-side child-loss guard removes the moved node from the local
+// tree when its new parent is an unloaded branch, so `findBreadcrumbPath` misses
+// it and the breadcrumb bar falls back to the server `["breadcrumbs", pageId]`
+// query. That query MUST be invalidated by a move, or the crumbs keep showing
+// the OLD parent until a refocus/navigation.
+describe("updateCacheOnMovePage — breadcrumbs invalidation (#523)", () => {
+  beforeEach(() => {
+    queryClient.clear();
+    vi.restoreAllMocks();
+  });
+
+  it("invalidates the moved page's ['breadcrumbs', pageId] query", () => {
+    const spy = vi.spyOn(queryClient, "invalidateQueries");
+
+    updateCacheOnMovePage("s1", "moved-page", "old-parent", "new-parent", {
+      id: "moved-page",
+    } as Partial<IPage>);
+
+    const invalidatedBreadcrumbs = spy.mock.calls.some(
+      ([arg]) =>
+        Array.isArray((arg as { queryKey?: unknown[] })?.queryKey) &&
+        (arg as { queryKey: unknown[] }).queryKey[0] === "breadcrumbs" &&
+        (arg as { queryKey: unknown[] }).queryKey[1] === "moved-page",
+    );
+    expect(invalidatedBreadcrumbs).toBe(true);
+  });
+});

apps/client/src/features/page/tree/components/doc-tree-row.tsx

@@ -55,7 +55,14 @@ type Props<T extends object> = {
 };
 
 const DRAG_TYPE = 'doc-tree-item';
-const AUTO_EXPAND_MS = 500;
+// Hover-hold before a collapsed row auto-expands during a drag. 2s (not ~0.5s)
+// so merely dragging the cursor THROUGH the tree never expands rows — only a
+// deliberate hold does (#523).
+const AUTO_EXPAND_MS = 2000;
+// How long the "a page just moved in here" cue stays on a collapsed target after
+// a make-child drop. Long enough to notice at a glance during frequent
+// collapsed-drops, short enough not to linger. Code-only UX constant (#523).
+const DROP_LANDED_HIGHLIGHT_MS = 1800;
 
 function DocTreeRowInner<T extends object>(props: Props<T>) {
   const {
@@ -93,7 +100,11 @@ function DocTreeRowInner<T extends object>(props: Props<T>) {
   const rowRef = useRef<HTMLElement>(null);
   const [isDragging, setIsDragging] = useState(false);
   const [instruction, setInstruction] = useState<Instruction | null>(null);
+  // Transient "just received a child" cue: a make-child drop no longer expands
+  // the (collapsed) target, so flash the row instead so the move isn't invisible.
+  const [landedChild, setLandedChild] = useState(false);
   const autoExpandTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const landedChildTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
 
   const cancelAutoExpand = useCallback(() => {
     if (autoExpandTimerRef.current) {
@@ -249,11 +260,24 @@ function DocTreeRowInner<T extends object>(props: Props<T>) {
               ? getDragLabel(sourceNode)
               : 'item';
             liveRegion.announce(`Moved ${sourceLabel} under ${parentName}.`);
-            // After a make-child drop, expand this row so the user sees the
-            // just-dropped child — especially important when the row had no
-            // children before (chevron just appeared) so the drop would
-            // otherwise be invisible.
-            if (op.kind === 'make-child') onToggle(node.id, true);
+            // Do NOT auto-expand the target on drop: a drop must leave the node
+            // collapsed. Intentional expansion is handled solely by the
+            // hover-hold timer (AUTO_EXPAND_MS). Feedback that the drop landed is
+            // given by the post-move flash + landed-cue highlight + live-region
+            // announce above. When the make-child target is collapsed, flash a
+            // distinct "child moved in here" cue on the row (it stays collapsed).
+            if (op.kind === 'make-child' && !isOpen) {
+              if (landedChildTimerRef.current) {
+                clearTimeout(landedChildTimerRef.current);
+              }
+              setLandedChild(true);
+              landedChildTimerRef.current = setTimeout(() => {
+                setLandedChild(false);
+                landedChildTimerRef.current = null;
+              }, DROP_LANDED_HIGHLIGHT_MS);
+            }
+            // Restore the openness of the MOVED page itself (source) — untouched
+            // by the above; the target is never expanded here.
             if (source.data.isOpenOnDragStart) onToggle(sourceId, true);
           },
         }),
@@ -281,6 +305,17 @@ function DocTreeRowInner<T extends object>(props: Props<T>) {
 
   useEffect(() => () => cancelAutoExpand(), [cancelAutoExpand]);
 
+  // Clear the landed-child cue timer on unmount (mirrors autoExpandTimerRef).
+  useEffect(
+    () => () => {
+      if (landedChildTimerRef.current) {
+        clearTimeout(landedChildTimerRef.current);
+        landedChildTimerRef.current = null;
+      }
+    },
+    [],
+  );
+
   const effectiveInst =
     instruction?.type === 'instruction-blocked'
       ? instruction.desired
@@ -317,6 +352,7 @@ function DocTreeRowInner<T extends object>(props: Props<T>) {
         className={styles.node}
         data-dragging={isDragging || undefined}
         data-selected={isSelected || undefined}
+        data-landed-child={landedChild || undefined}
         data-receiving-drop={
           receivingDrop === 'make-child'
             ? blocked

apps/client/src/features/page/tree/hooks/use-tree-mutation.move-guard.test.tsx

@@ -0,0 +1,149 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { renderHook, act } from "@testing-library/react";
+import { Provider, createStore } from "jotai";
+import type { ReactNode } from "react";
+
+import { treeDataAtom } from "@/features/page/tree/atoms/tree-data-atom.ts";
+import { treeModel } from "@/features/page/tree/model/tree-model";
+import type { SpaceTreeNode } from "@/features/page/tree/types";
+
+// --- Boundary mocks: only the network/query + router/i18n surfaces the hook
+// touches. The tree math (treeModel, dropOpToMovePayload) runs for real so the
+// child-loss guard is exercised end-to-end.
+const moveMutate = vi.fn().mockResolvedValue({});
+const updateCacheOnMovePageMock = vi.fn();
+vi.mock("@/features/page/queries/page-query.ts", () => ({
+  useCreatePageMutation: () => ({ mutateAsync: vi.fn() }),
+  useUpdatePageMutation: () => ({ mutateAsync: vi.fn() }),
+  useRemovePageMutation: () => ({ mutateAsync: vi.fn() }),
+  useMovePageMutation: () => ({ mutateAsync: moveMutate }),
+  updateCacheOnMovePage: (...args: unknown[]) =>
+    updateCacheOnMovePageMock(...args),
+}));
+vi.mock("react-router-dom", () => ({
+  useNavigate: () => vi.fn(),
+  useParams: () => ({ spaceSlug: "space", pageSlug: undefined }),
+}));
+vi.mock("react-i18next", () => ({
+  useTranslation: () => ({ t: (s: string) => s }),
+}));
+vi.mock("@mantine/notifications", () => ({
+  notifications: { show: vi.fn() },
+}));
+
+// Import AFTER mocks so the hook binds to them.
+import { useTreeMutation } from "./use-tree-mutation";
+
+function node(
+  id: string,
+  over: Partial<SpaceTreeNode> = {},
+): SpaceTreeNode {
+  return {
+    id,
+    slugId: `slug-${id}`,
+    name: id.toUpperCase(),
+    position: "a0",
+    spaceId: "space-1",
+    parentPageId: null as unknown as string,
+    hasChildren: false,
+    children: [],
+    ...over,
+  };
+}
+
+function setup(before: SpaceTreeNode[]) {
+  const store = createStore();
+  store.set(treeDataAtom, before);
+  const wrapper = ({ children }: { children: ReactNode }) => (
+    <Provider store={store}>{children}</Provider>
+  );
+  const { result } = renderHook(() => useTreeMutation("space-1"), { wrapper });
+  return { store, result };
+}
+
+describe("useTreeMutation.handleMove — child-loss guard (#523)", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    moveMutate.mockResolvedValue({});
+  });
+
+  it("make-child into an UNLOADED folder does NOT materialize [source] — keeps it lazy-loadable", async () => {
+    // F has children on the server but none are loaded here (canonical unloaded
+    // form: hasChildren + children:[]). X sits at root.
+    const before = [
+      node("F", { position: "a0", hasChildren: true, children: [] }),
+      node("X", { position: "a5" }),
+    ];
+    const { store, result } = setup(before);
+
+    await act(async () => {
+      await result.current.handleMove("X", {
+        kind: "make-child",
+        targetId: "F",
+      });
+    });
+
+    const tree = store.get(treeDataAtom);
+    const f = treeModel.find(tree, "F");
+    // The guard leaves F unloaded (children stay []), so a later expand fetches
+    // the FULL server set (incl. X) instead of showing a misleading partial [X].
+    // MUTATION: dropping the guard (using the `move` result) would put children
+    // === [X] here and redden this.
+    expect(f?.children).toEqual([]);
+    expect(f?.hasChildren).toBe(true);
+    // X is removed from its old (root) slot; it reappears on expand/load of F.
+    expect(treeModel.find(tree, "X")).toBeNull();
+    // The server move is still persisted.
+    expect(moveMutate).toHaveBeenCalledTimes(1);
+  });
+
+  it("make-child into a LOADED folder appends source and KEEPS the existing children", async () => {
+    // F is loaded with one child c1; moving X in must preserve c1 (no loss) and
+    // append X — this path does NOT hit the guard.
+    const before = [
+      node("F", {
+        position: "a0",
+        hasChildren: true,
+        children: [node("c1", { position: "a1", parentPageId: "F" })],
+      }),
+      node("X", { position: "a5" }),
+    ];
+    const { store, result } = setup(before);
+
+    await act(async () => {
+      await result.current.handleMove("X", {
+        kind: "make-child",
+        targetId: "F",
+      });
+    });
+
+    const tree = store.get(treeDataAtom);
+    const f = treeModel.find(tree, "F");
+    expect(f?.children?.map((n) => n.id)).toEqual(["c1", "X"]);
+    expect(f?.hasChildren).toBe(true);
+    // X now lives under F.
+    expect(treeModel.find(tree, "X")?.parentPageId).toBe("F");
+  });
+
+  it("make-child into a genuinely-empty leaf materializes the child (nothing to lose)", async () => {
+    // Leaf L has no server children (hasChildren:false). Dropping X in should
+    // show X immediately — the guard must NOT fire here.
+    const before = [
+      node("L", { position: "a0", hasChildren: false, children: [] }),
+      node("X", { position: "a5" }),
+    ];
+    const { store, result } = setup(before);
+
+    await act(async () => {
+      await result.current.handleMove("X", {
+        kind: "make-child",
+        targetId: "L",
+      });
+    });
+
+    const tree = store.get(treeDataAtom);
+    const l = treeModel.find(tree, "L");
+    expect(l?.children?.map((n) => n.id)).toEqual(["X"]);
+    expect(l?.hasChildren).toBe(true);
+  });
+});

apps/client/src/features/page/tree/hooks/use-tree-mutation.ts

@@ -61,11 +61,48 @@ export function useTreeMutation(spaceId: string): UseTreeMutation {
       if (!source) return;
       const oldParentId = source.parentPageId ?? null;
 
-      // optimistic apply with the new position from the payload
-      let optimistic = treeModel.update(after, sourceId, {
-        position: payload.position,
-        parentPageId: payload.parentPageId,
-      } as Partial<SpaceTreeNode>);
+      // Child-loss guard (#523, twin of #525's realtime `insertByPosition` fix).
+      // We no longer auto-expand the make-child target on drop, so the old
+      // `onToggle(target, true)` — which was ALSO the only trigger of the
+      // corrective lazy-load — is gone. `treeModel.move` materialized
+      // `target.children = [source]` (only the moved node); if the target is an
+      // UNLOADED branch (server has children but none are loaded here), keeping
+      // that partial `[source]` list would defeat the lazy-load gate and hide the
+      // target's OTHER server children (the #159 #1 data-loss class). So for an
+      // unloaded make-child target, build the optimistic tree WITHOUT
+      // materializing source under it: just remove source from its old parent and
+      // flag the target `hasChildren`. The gate stays armed and a later manual
+      // expand fetches the FULL set (incl. the moved page, which the awaited
+      // server move persists). Predicate is the gate's (`isUnloadedBranch`), NOT
+      // `insertByPosition`'s old `=== undefined` (canonical unloaded is `[]`).
+      const target =
+        op.kind === "make-child"
+          ? (treeModel.find(before, op.targetId) as SpaceTreeNode | null)
+          : null;
+      const unloadedMakeChild =
+        op.kind === "make-child" && treeModel.isUnloadedBranch(target);
+
+      let optimistic: SpaceTreeNode[];
+      if (unloadedMakeChild) {
+        // Do NOT materialize [source] into the unloaded target.
+        optimistic = treeModel.remove(before, sourceId);
+        optimistic = treeModel.update(optimistic, op.targetId, {
+          hasChildren: true,
+        } as Partial<SpaceTreeNode>);
+      } else {
+        // optimistic apply with the new position from the payload
+        optimistic = treeModel.update(after, sourceId, {
+          position: payload.position,
+          parentPageId: payload.parentPageId,
+        } as Partial<SpaceTreeNode>);
+        // For make-child onto a previously-childless (loaded) target: flip
+        // hasChildren on so the new parent shows its chevron.
+        if (op.kind === "make-child") {
+          optimistic = treeModel.update(optimistic, op.targetId, {
+            hasChildren: true,
+          } as Partial<SpaceTreeNode>);
+        }
+      }
 
       // If the old parent has no children left, mark hasChildren: false so the
       // chevron disappears. Without this, the empty parent keeps rendering an
@@ -79,14 +116,6 @@ export function useTreeMutation(spaceId: string): UseTreeMutation {
         }
       }
 
-      // For make-child onto a previously-childless target: flip hasChildren on
-      // so the new parent shows its chevron.
-      if (op.kind === "make-child") {
-        optimistic = treeModel.update(optimistic, op.targetId, {
-          hasChildren: true,
-        } as Partial<SpaceTreeNode>);
-      }
-
       setData(optimistic);
 
       try {

apps/client/src/features/page/tree/styles/tree.module.css

@@ -150,6 +150,45 @@
     );
 }
 
+/* "A page just moved in here" cue (#523). A make-child drop no longer expands
+   the collapsed target, so the moved page is momentarily invisible; pulse the
+   target row in a distinct teal (NOT the blue make-child highlight, NOT the
+   neutral post-move flash) so the landing is noticeable while the node stays
+   collapsed. Two short pulses fit inside DROP_LANDED_HIGHLIGHT_MS (1.8s), after
+   which the row clears the attribute and the animation stops. */
+@keyframes landedChildPulse {
+    0% {
+        background-color: light-dark(
+            var(--mantine-color-teal-2),
+            rgba(45, 212, 191, 0.30)
+        );
+        outline-color: light-dark(
+            var(--mantine-color-teal-6),
+            var(--mantine-color-teal-5)
+        );
+    }
+    100% {
+        background-color: transparent;
+        outline-color: transparent;
+    }
+}
+
+.node[data-landed-child="true"] {
+    outline: 2px solid transparent;
+    outline-offset: -1px;
+    animation: landedChildPulse 0.9s ease-out 2;
+}
+
+@media (prefers-reduced-motion: reduce) {
+    .node[data-landed-child="true"] {
+        animation: none;
+        background-color: light-dark(
+            var(--mantine-color-teal-1),
+            rgba(45, 212, 191, 0.18)
+        );
+    }
+}
+
 .dropLine {
     position: absolute;
     left: var(--drop-line-indent, 0);

apps/client/src/lib/telemetry/route-template.ts

@@ -36,6 +36,7 @@ const STATIC_ROUTES = new Set<string>([
   '/setup/register',
   '/settings/account/profile',
   '/settings/account/preferences',
+  '/settings/account/api-keys',
   '/settings/workspace',
   '/settings/ai',
   '/settings/members',

apps/client/src/pages/settings/account/account-api-keys.tsx

@@ -0,0 +1,22 @@
+import SettingsTitle from "@/components/settings/settings-title.tsx";
+import ApiKeysManager from "@/features/api-key/components/api-keys-manager";
+import { getAppName } from "@/lib/config.ts";
+import { Helmet } from "react-helmet-async";
+import { useTranslation } from "react-i18next";
+
+export default function AccountApiKeys() {
+  const { t } = useTranslation();
+
+  return (
+    <>
+      <Helmet>
+        <title>
+          {t("API keys")} - {getAppName()}
+        </title>
+      </Helmet>
+      <SettingsTitle title={t("API keys")} />
+
+      <ApiKeysManager />
+    </>
+  );
+}

apps/client/src/styles/notification-overrides.css

@@ -14,9 +14,11 @@
  */
 
 /*
- * Push the top-anchored toast containers below the top chrome (fixed 45px
- * header + optional 45px format toolbar + ~6px gap) so a toast (z-index 10000)
- * neither covers nor intercepts clicks on the header/toolbar (both z-index 99).
+ * Anchor the top toast containers to the very top edge of the viewport (a small
+ * 8px gap), above the header/search chrome, per product request. The toast
+ * (z-index 10000) therefore renders over the header/toolbar (both z-index 99)
+ * for the few seconds it is visible — intentional, since it is the top-most,
+ * in-the-line-of-sight surface.
  *
  * Scoped to [data-position^='top'] on purpose. Mantine renders ALL SIX position
  * containers simultaneously (`position` only routes toasts into one via the
@@ -34,7 +36,7 @@
  * (the :where() contributes 0), regardless of stylesheet order.
  */
 .mantine-Notifications-root[data-position^='top'] {
-  top: 96px;
+  top: 8px;
 }
 
 [data-mantine-color-scheme='light'] .mantine-Notification-root {

apps/client/vitest.setup.ts

@@ -63,3 +63,15 @@ vi.stubGlobal("matchMedia", (query: string) => ({
   removeEventListener: vi.fn(),
   dispatchEvent: vi.fn(),
 }));
+
+// Mantine's ScrollArea (used by Table.ScrollContainer, ScrollArea, etc.) reads
+// `ResizeObserver` in a layout effect on mount, which jsdom does not implement.
+// A no-op stub lets any test rendering those components mount cleanly.
+vi.stubGlobal(
+  "ResizeObserver",
+  class {
+    observe() {}
+    unobserve() {}
+    disconnect() {}
+  },
+);

apps/server/src/collaboration/extensions/persistence-store.spec.ts

@@ -736,6 +736,53 @@ describe('PersistenceExtension.onStoreDocument — Approach-A boundary snapshot'
       expect(historyQueue.remove).toHaveBeenCalledWith(PAGE_ID);
       expect(historyQueue.remove).not.toHaveBeenCalledWith(SLUG);
     });
+
+    // #370 F2 — an effectively-empty page is a REACHABLE no-op (agent calls
+    // save_page_version on a blank page): the version tx short-circuits with
+    // nothing to pin. The handler MUST still broadcast a TERMINAL reply
+    // (version.skipped, reason:'empty') so the client resolves at once instead of
+    // waiting out its 20s ack timeout and misreporting a healthy server as
+    // unreachable. MUTATION: drop the `else if (skipped)` broadcast → no terminal
+    // reply is sent → this reddens.
+    it('empty page → no version written, broadcasts a terminal version.skipped(empty)', async () => {
+      const emptyDoc = { type: 'doc', content: [{ type: 'paragraph' }] };
+      const document = ydocFor(emptyDoc);
+      pageRepo.findById.mockResolvedValue({
+        ...persistedHumanPage('IGNORED'),
+        content: emptyDoc,
+      });
+
+      await emitSave(document, 'agent');
+
+      // Nothing pinned.
+      expect(pageHistoryRepo.saveHistory).not.toHaveBeenCalled();
+      expect(pageHistoryRepo.updateHistoryKind).not.toHaveBeenCalled();
+      // But a terminal reply WAS sent so the client never times out. The flush
+      // (onStoreDocument) emits its own `page.updated`; the version.skipped is the
+      // LAST broadcast (dropping the skip branch leaves page.updated last → reds).
+      const calls = (document as any).broadcastStateless.mock.calls;
+      const msg = JSON.parse(calls[calls.length - 1][0]);
+      expect(msg).toEqual({ type: 'version.skipped', reason: 'empty' });
+    });
+
+    // #370 F2 — the page row is gone (deleted / never persisted). Same rule: a
+    // terminal reply MUST be sent (version.skipped, reason:'page-not-found') so the
+    // client surfaces a truthful "not found" immediately rather than a health
+    // timeout. onStoreDocument's own `!page` guard returns early without throwing,
+    // so the handler reaches the version tx and its `!page` skip branch.
+    it('page not found → broadcasts a terminal version.skipped(page-not-found)', async () => {
+      const document = ydocFor(doc('GONE'));
+      pageRepo.findById.mockResolvedValue(null);
+
+      await emitSave(document, 'agent');
+
+      expect(pageHistoryRepo.saveHistory).not.toHaveBeenCalled();
+      expect((document as any).broadcastStateless).toHaveBeenCalledTimes(1);
+      const msg = JSON.parse(
+        (document as any).broadcastStateless.mock.calls[0][0],
+      );
+      expect(msg).toEqual({ type: 'version.skipped', reason: 'page-not-found' });
+    });
   });
 
   // #370 — the in-memory idle-burst marker must be dropped on doc unload (like

apps/server/src/collaboration/extensions/persistence.extension.ts

@@ -68,6 +68,19 @@ export const INTENTIONAL_CLEAR_MESSAGE_TYPE = 'intentional-clear';
  */
 export const SAVE_VERSION_MESSAGE_TYPE = 'save-version';
 
+/**
+ * #370 F2 — wire format of the server→client REPLY to a save-version signal, sent
+ * over the same stateless channel. `version.saved` means a version was created or
+ * promoted; `version.skipped` is a TERMINAL "nothing was pinned" reply for the two
+ * reachable no-op cases (an effectively-empty page, or the page row is gone) so the
+ * client resolves at once instead of waiting out its ack timeout and misreporting a
+ * healthy server as unreachable. EXACTLY ONE of these is broadcast per handled
+ * save. The MCP client duplicates these literals (it cannot import server code) —
+ * keep the two in sync (see packages/mcp/src/lib/collaboration.ts).
+ */
+export const VERSION_SAVED_MESSAGE_TYPE = 'version.saved';
+export const VERSION_SKIPPED_MESSAGE_TYPE = 'version.skipped';
+
 /**
  * #251 — how long an intentional-clear signal stays "pending" before it is
  * ignored. The signal is set on the clearing keystroke but consumed by the
@@ -643,6 +656,10 @@ export class PersistenceExtension implements Extension {
     let result:
       | { historyId: string; kind: PageHistoryKind; alreadySaved: boolean }
       | undefined;
+    // #370 F2 — set when there is nothing to version (empty page / page gone), so
+    // the tail broadcasts a terminal `version.skipped` instead of staying silent
+    // and forcing the client to time out. Mutually exclusive with `result`.
+    let skipped: 'empty' | 'page-not-found' | undefined;
 
     // #370 F8-twin — the contributor set popped from Redis (destructive SPOP)
     // must be restored if the version row does not durably land. The inner
@@ -668,11 +685,20 @@ export class PersistenceExtension implements Extension {
           includeContent: true,
           trx,
         });
-        if (!page) return;
+        if (!page) {
+          // The page row is gone (deleted/never persisted). Nothing to version —
+          // record it so the tail sends a terminal skip reply (#370 F2).
+          skipped = 'page-not-found';
+          return;
+        }
         versionedPageId = page.id;
         // Never version an effectively-empty page (mirrors the processor's
-        // first-history guard); there is nothing intentional to pin.
-        if (isEmptyParagraphDoc(page.content as any)) return;
+        // first-history guard); there is nothing intentional to pin. Record the
+        // skip so the client gets a terminal reply rather than a timeout (#370 F2).
+        if (isEmptyParagraphDoc(page.content as any)) {
+          skipped = 'empty';
+          return;
+        }
 
         const lastHistory = await this.pageHistoryRepo.findPageLastHistory(
           page.id,
@@ -747,15 +773,26 @@ export class PersistenceExtension implements Extension {
     }
     this.idleBurstStart.delete(documentName);
 
+    // EXACTLY ONE terminal reply per handled save (#370 F2): a real save/promote
+    // broadcasts `version.saved`; the two no-op early returns (empty page / page
+    // gone) broadcast `version.skipped` so the client never waits out its ack
+    // timeout. A genuine failure threw above and rejected before reaching here.
     if (result) {
       document.broadcastStateless(
         JSON.stringify({
-          type: 'version.saved',
+          type: VERSION_SAVED_MESSAGE_TYPE,
           historyId: result.historyId,
           kind: result.kind,
           alreadySaved: result.alreadySaved,
         }),
       );
+    } else if (skipped) {
+      document.broadcastStateless(
+        JSON.stringify({
+          type: VERSION_SKIPPED_MESSAGE_TYPE,
+          reason: skipped,
+        }),
+      );
     }
   }
 

apps/server/src/core/ai-chat/ai-chat.service.run-race.spec.ts

@@ -370,10 +370,12 @@ describe('AiChatService.stream — abortSignal wiring (#184 F3)', () => {
     );
   });
 
-  // #490 reactive branch: a provider CONTEXT-OVERFLOW 400 in onError is classified,
-  // records a distinguishable cause, and stamps metadata.replayOverflow so the NEXT
-  // turn's budgeter trims aggressively (the recovery that un-bricks the chat).
-  it('#490: a context-overflow 400 stamps replayOverflow on the finalized row', async () => {
+  // #490/#520 reactive branch: a provider CONTEXT-OVERFLOW 400 in onError is
+  // classified, records a distinguishable cause, and stamps the consecutive-overflow
+  // COUNTER (metadata.replayOverflowCount) so the NEXT turn's budgeter trims with
+  // escalating aggression (the recovery that un-bricks the chat). This is a fresh
+  // chat (empty history -> prior streak 0), so the first overflow stamps count 1.
+  it('#490/#520: a context-overflow 400 stamps replayOverflowCount=1 on the finalized row', async () => {
     jest
       .spyOn(Logger.prototype, 'error')
       .mockImplementation(() => undefined as never);
@@ -397,11 +399,14 @@ describe('AiChatService.stream — abortSignal wiring (#184 F3)', () => {
       metadata: Record<string, unknown>;
     };
     expect(patch.status).toBe('error');
-    expect(patch.metadata.replayOverflow).toBe(true);
+    // First overflow on a fresh chat -> k = prior(0) + 1 = 1.
+    expect(patch.metadata.replayOverflowCount).toBe(1);
+    // The legacy boolean is no longer written (the counter supersedes it).
+    expect('replayOverflow' in patch.metadata).toBe(false);
     expect(patch.metadata.error).toContain('контекстное окно');
   });
 
-  it('#490: a non-overflow error does NOT stamp replayOverflow', async () => {
+  it('#490/#520: a non-overflow error does NOT stamp the overflow counter', async () => {
     jest
       .spyOn(Logger.prototype, 'error')
       .mockImplementation(() => undefined as never);
@@ -412,6 +417,7 @@ describe('AiChatService.stream — abortSignal wiring (#184 F3)', () => {
       status: string;
       metadata: Record<string, unknown>;
     };
+    expect('replayOverflowCount' in patch.metadata).toBe(false);
     expect('replayOverflow' in patch.metadata).toBe(false);
   });
 });

apps/server/src/core/ai-chat/ai-chat.service.spec.ts

@@ -30,13 +30,16 @@ import {
   STEP_LIMIT_NO_ANSWER_MARKER,
   OUTPUT_DEGENERATION_ERROR,
   lastAssistantContextTokens,
-  lastAssistantReplayOverflow,
+  lastAssistantReplayOverflowCount,
   seedActivatedTools,
 } from './ai-chat.service';
 import type { AiChatMessage, Workspace } from '@docmost/db/types/entity.types';
 import { buildSystemPrompt } from './ai-chat.prompt';
 import type { McpClientsService } from './external-mcp/mcp-clients.service';
-import { resolveEffectiveReplayThreshold } from './history-budget';
+import {
+  resolveEffectiveReplayThreshold,
+  REPLAY_MIN_FLOOR_TOKENS,
+} from './history-budget';
 
 /**
  * Unit tests for compactToolOutput: the pure helper that shrinks tool outputs
@@ -554,49 +557,129 @@ describe('seedActivatedTools', () => {
   });
 });
 
-describe('lastAssistantReplayOverflow', () => {
+describe('lastAssistantReplayOverflowCount', () => {
   const row = (
     role: string,
     metadata: Record<string, unknown> | null,
   ): AiChatMessage => ({ role, metadata }) as unknown as AiChatMessage;
 
-  it('is true only when the LAST assistant turn overflowed', () => {
+  it('reads the consecutive-overflow count from the LAST assistant turn', () => {
     expect(
-      lastAssistantReplayOverflow([
-        row('assistant', { replayOverflow: true }),
+      lastAssistantReplayOverflowCount([
+        row('assistant', { replayOverflowCount: 3 }),
         row('user', null),
       ]),
-    ).toBe(true);
-    // A recovered (later, non-overflow) assistant turn clears it.
+    ).toBe(3);
+    // A recovered (later, non-overflow) assistant turn resets it to 0 — the read
+    // stops at the most recent assistant row, which carries no count.
     expect(
-      lastAssistantReplayOverflow([
-        row('assistant', { replayOverflow: true }),
+      lastAssistantReplayOverflowCount([
+        row('assistant', { replayOverflowCount: 3 }),
         row('user', null),
         row('assistant', { contextTokens: 5 }),
       ]),
-    ).toBe(false);
-    expect(lastAssistantReplayOverflow([])).toBe(false);
+    ).toBe(0);
+    expect(lastAssistantReplayOverflowCount([])).toBe(0);
   });
 
-  // #490 reactive recovery: a prior turn stamped `replayOverflow` must make the
-  // NEXT turn's effective budget the AGGRESSIVE 0.5x cut — that harder trim is
-  // what un-bricks a chat that just 400'd on the context window. This exercises
-  // the exact wiring the service uses: read the stamp, then scale the threshold.
-  it('#490: a prior replayOverflow drives the next turn to the 0.5x aggressive budget', () => {
+  // BACK-COMPAT (#520): an in-flight row written by the pre-#520 boolean stamp
+  // (`replayOverflow: true`, no count) reads as k=1 — the old single 0.5× behavior —
+  // so a chat mid-recovery across the deploy does not regress.
+  it('#520 back-compat: a legacy boolean replayOverflow reads as k=1', () => {
+    expect(
+      lastAssistantReplayOverflowCount([
+        row('assistant', { replayOverflow: true }),
+        row('user', null),
+      ]),
+    ).toBe(1);
+    // A legacy row with the flag absent/false is k=0.
+    expect(
+      lastAssistantReplayOverflowCount([row('assistant', { contextTokens: 5 })]),
+    ).toBe(0);
+  });
+
+  // A corrupt/negative persisted count never yields a negative k.
+  it('clamps a corrupt negative count to 0', () => {
+    expect(
+      lastAssistantReplayOverflowCount([
+        row('assistant', { replayOverflowCount: -4 }),
+      ]),
+    ).toBe(0);
+  });
+
+  // #490/#520 reactive recovery: the prior consecutive-overflow count `k` drives
+  // the next turn's effective budget to an ESCALATING cut (0.5**k) — each further
+  // consecutive 400 tightens it, which is what un-bricks a chat that keeps
+  // overflowing. This exercises the exact wiring the service uses: read the count,
+  // then scale the threshold.
+  it('#490/#520: the prior count drives the next turn to the escalating aggressive budget', () => {
     const history = [
-      row('assistant', { replayOverflow: true }),
+      row('assistant', { replayOverflowCount: 1 }),
       row('user', null),
     ];
-    const priorOverflowed = lastAssistantReplayOverflow(history);
-    expect(priorOverflowed).toBe(true);
-    // Base budget 100k -> aggressive recovery halves it to 50k this turn.
-    expect(resolveEffectiveReplayThreshold(100_000, priorOverflowed)).toBe(50_000);
+    const k = lastAssistantReplayOverflowCount(history);
+    expect(k).toBe(1);
+    // Base budget 100k -> first-overflow recovery halves it to 50k this turn.
+    expect(resolveEffectiveReplayThreshold(100_000, k)).toBe(50_000);
+    // A second consecutive overflow (k=2) quarters it.
+    expect(resolveEffectiveReplayThreshold(100_000, 2)).toBe(25_000);
     // Odd base floors, not rounds.
-    expect(resolveEffectiveReplayThreshold(99_999, true)).toBe(49_999);
-    // No prior overflow -> the base budget is used verbatim (no aggressive cut).
-    expect(resolveEffectiveReplayThreshold(100_000, false)).toBe(100_000);
+    expect(resolveEffectiveReplayThreshold(99_999, 1)).toBe(49_999);
+    // No prior overflow (k=0) -> the base budget is used verbatim (no cut).
+    expect(resolveEffectiveReplayThreshold(100_000, 0)).toBe(100_000);
     // An explicit off-switch (null) is never overridden, even on recovery.
-    expect(resolveEffectiveReplayThreshold(null, true)).toBeNull();
+    expect(resolveEffectiveReplayThreshold(null, 3)).toBeNull();
+  });
+
+  // #520 escalation table + convergence: the cut deepens each consecutive overflow
+  // and is CLAMPED at the floor so it converges (un-bricks even against a small
+  // real window), instead of the old fixed single 0.5× that stuck at 50k forever.
+  it('#520: escalates and converges to the floor, un-bricking a small real window', () => {
+    const base = 100_000;
+    expect(resolveEffectiveReplayThreshold(base, 0)).toBe(base);
+    expect(resolveEffectiveReplayThreshold(base, 1)).toBe(50_000);
+    expect(resolveEffectiveReplayThreshold(base, 2)).toBe(25_000);
+    expect(resolveEffectiveReplayThreshold(base, 3)).toBe(12_500);
+
+    // Residual-brick regression (#520): with the flat-default base (100k) and a real
+    // model window of ~40k, the OLD fixed 0.5× stuck at 50k forever (> 40k -> 400s
+    // again, never recovers). The escalating cut drops BELOW 40k after enough
+    // consecutive overflows -> the history finally fits -> the chat un-bricks.
+    const realWindow = 40_000;
+    // k=1 (50k) still exceeds the window — the old behavior's terminal state.
+    expect(resolveEffectiveReplayThreshold(base, 1)).toBeGreaterThan(realWindow);
+    // But escalation converges under the window within a couple more turns.
+    const converged = [2, 3, 4, 5].some(
+      (k) => (resolveEffectiveReplayThreshold(base, k) as number) < realWindow,
+    );
+    expect(converged).toBe(true);
+
+    // Convergence is bounded BELOW by the floor: a large k never trims below it.
+    for (const k of [4, 8, 20, 100]) {
+      expect(resolveEffectiveReplayThreshold(base, k)).toBe(REPLAY_MIN_FLOOR_TOKENS);
+      expect(
+        resolveEffectiveReplayThreshold(base, k) as number,
+      ).toBeGreaterThanOrEqual(REPLAY_MIN_FLOOR_TOKENS);
+    }
+  });
+
+  // The floor never RAISES a legitimately small configured budget above itself —
+  // that would re-overflow the very window it was configured for. Under #520 Option B
+  // recovery MAY cut it BELOW itself (down to floor(0.5×base) = the old 0.5× cut).
+  it('#520: never inflates a small configured budget above itself (may cut below)', () => {
+    const small = 5_000; // below the floor
+    const floor = Math.min(REPLAY_MIN_FLOOR_TOKENS, Math.floor(small * 0.5)); // 2500
+    expect(resolveEffectiveReplayThreshold(small, 0)).toBe(small);
+    // Even under escalation the effective threshold never exceeds the base, and never
+    // drops below the absolute floor.
+    for (const k of [1, 2, 3, 10]) {
+      const t = resolveEffectiveReplayThreshold(small, k) as number;
+      expect(t).toBeLessThanOrEqual(small);
+      expect(t).toBeGreaterThanOrEqual(floor);
+    }
+    // Option B: on overflow it DOES cut below the configured budget (old floor==budget
+    // behavior would keep this at `small`).
+    expect(resolveEffectiveReplayThreshold(small, 1)).toBe(floor);
   });
 });
 
@@ -930,21 +1013,50 @@ describe('flushAssistant', () => {
     expect(flushed.metadata.error).toBe('boom');
   });
 
-  // #490 observability: the replay budgeter's decision is stamped on the turn.
-  it('records replayTrimmedToTokens + replayOverflow when provided', () => {
+  // #490/#520 observability: the replay budgeter's decision is stamped on the turn,
+  // now including the consecutive-overflow COUNTER (#520) the next turn escalates on.
+  it('records replayTrimmedToTokens + replayOverflowCount when provided', () => {
     const f = flushAssistant([], '', 'error', {
       error: 'ctx',
       replayTrimmedToTokens: 42_000,
-      replayOverflow: true,
+      replayOverflowCount: 2,
     });
     expect(f.metadata.replayTrimmedToTokens).toBe(42_000);
-    expect(f.metadata.replayOverflow).toBe(true);
+    expect(f.metadata.replayOverflowCount).toBe(2);
   });
 
   it('omits the replay metadata when not provided', () => {
     const f = flushAssistant([], '', 'completed', { finishReason: 'stop' });
     expect('replayTrimmedToTokens' in f.metadata).toBe(false);
-    expect('replayOverflow' in f.metadata).toBe(false);
+    expect('replayOverflowCount' in f.metadata).toBe(false);
+    expect('replayBelowConfiguredBudget' in f.metadata).toBe(false);
+  });
+
+  // #520 Option B observability: the turn is marked when recovery replayed BELOW the
+  // admin-configured budget, so the UI/telemetry can surface "config too large".
+  it('stamps replayBelowConfiguredBudget when recovery cut below the configured budget', () => {
+    const f = flushAssistant([], '', 'error', {
+      error: 'ctx',
+      replayOverflowCount: 2,
+      replayBelowConfiguredBudget: true,
+    });
+    // MUTATION SENTINEL: dropping the metadata stamp in flushAssistant reddens this.
+    expect(f.metadata.replayBelowConfiguredBudget).toBe(true);
+  });
+
+  it('omits replayBelowConfiguredBudget on a normal in-budget replay', () => {
+    // false/omitted must NOT leave the flag on the turn (only the below-budget case).
+    const off = flushAssistant([], '', 'completed', {
+      replayBelowConfiguredBudget: false,
+    });
+    expect('replayBelowConfiguredBudget' in off.metadata).toBe(false);
+  });
+
+  // A clean finalize (no overflow -> count 0/omitted) leaves NO counter, which the
+  // next turn reads as k=0 — the reset that ends a recovery streak.
+  it('omits replayOverflowCount for a zero/absent count (reset semantics)', () => {
+    const zero = flushAssistant([], '', 'completed', { replayOverflowCount: 0 });
+    expect('replayOverflowCount' in zero.metadata).toBe(false);
   });
 
   // #274 observability: the page-change diff the agent saw this turn is persisted

apps/server/src/core/ai-chat/ai-chat.service.ts

@@ -141,9 +141,10 @@ const OUTPUT_DEGENERATION_ERROR =
 
 // Prefix recorded on the assistant row when the provider rejected the turn for
 // CONTEXT OVERFLOW (#490): the replayed history exceeded the model's window. The
-// row is ALSO stamped `metadata.replayOverflow` so the NEXT turn's budgeter trims
-// aggressively (the reactive recovery — the overflowing turn had no usage signal
-// to trigger preventive trimming, so the classified 400 is what un-bricks it).
+// row is ALSO stamped `metadata.replayOverflowCount` (the consecutive-overflow
+// counter, #520) so the NEXT turn's budgeter trims with escalating aggression (the
+// reactive recovery — the overflowing turn had no usage signal to trigger
+// preventive trimming, so the classified 400 is what un-bricks it).
 export const CONTEXT_OVERFLOW_ERROR_PREFIX =
   'Диалог превысил контекстное окно модели; история будет агрессивно ' +
   'сокращена на следующем ходу.';
@@ -1228,27 +1229,52 @@ export class AiChatService implements OnModuleInit, OnModuleDestroy {
       }
       // Last turn's provider-reported context size (authoritative when present).
       const priorContextTokens = lastAssistantContextTokens(oldHistory);
-      // Reactive recovery (#490): if the LAST turn was rejected for context
-      // overflow (stamped by onError), trim AGGRESSIVELY this turn — the
-      // overflowing turn produced no usage signal, so a normal-threshold trim may
-      // not shrink enough to fit. This is what un-bricks a chat that just 400'd.
-      const priorOverflowed = lastAssistantReplayOverflow(oldHistory);
+      // Reactive recovery (#490/#520): `k` = how many CONSECUTIVE preceding turns
+      // were rejected for context overflow (stamped by onError). Each consecutive
+      // overflow trims MORE aggressively (resolveEffectiveReplayThreshold scales the
+      // budget by 0.5**k, clamped at the floor) so recovery ESCALATES until the
+      // history fits — the overflowing turn produced no usage signal, so a single
+      // fixed cut may not shrink enough when the real model window is small. This is
+      // what un-bricks a chat that keeps 400'ing on the context window.
+      const priorOverflowCount = lastAssistantReplayOverflowCount(oldHistory);
       const effectiveThreshold = resolveEffectiveReplayThreshold(
         replayBudget.thresholdTokens,
-        priorOverflowed,
+        priorOverflowCount,
       );
-      if (priorOverflowed) {
-        this.logger.warn(
-          `AI chat (chat ${chatId}): previous turn hit context overflow; ` +
-            `applying aggressive replay budget (${effectiveThreshold} tokens).`,
-        );
+      // #520 Option B: recovery MAY cut the replay budget BELOW the admin-configured
+      // window when the provider keeps proving non-fit (the anti-brick invariant of
+      // the reactive branch beats a config that a 400 has disproved). Surface it so
+      // the admin sees their window is factually too large, and mark the turn so the
+      // UI/telemetry can show it. Only true when actually below (not on in-budget
+      // escalation edge cases); k>0 implies below for any budget >= 2 tokens.
+      const replayBelowConfiguredBudget =
+        replayBudget.thresholdTokens != null &&
+        effectiveThreshold != null &&
+        effectiveThreshold < replayBudget.thresholdTokens;
+      if (priorOverflowCount > 0) {
+        if (replayBelowConfiguredBudget) {
+          this.logger.warn(
+            `AI chat (chat ${chatId}): configured replay budget ` +
+              `(${replayBudget.thresholdTokens} tokens) does not fit the model — ` +
+              `replaying BELOW it at ${effectiveThreshold} tokens after ` +
+              `${priorOverflowCount} consecutive context overflow(s) ` +
+              `(escalation level ${priorOverflowCount}). Lower chatContextWindow ` +
+              `to match the model's real context window.`,
+          );
+        } else {
+          this.logger.warn(
+            `AI chat (chat ${chatId}): ${priorOverflowCount} consecutive context ` +
+              `overflow(s); applying escalated aggressive replay budget ` +
+              `(${effectiveThreshold} tokens).`,
+          );
+        }
       }
       const preTrim = trimHistoryForReplay(
         messages,
         effectiveThreshold,
         // A prior OVERFLOW means the provider count is stale/absent — force the
         // char-estimate path by ignoring priorContextTokens on recovery.
-        priorOverflowed ? undefined : priorContextTokens,
+        priorOverflowCount > 0 ? undefined : priorContextTokens,
       );
       messages = preTrim.messages;
       // Observability (#490): record the budgeter's decision on the turn so the UI
@@ -1903,6 +1929,10 @@ export class AiChatService implements OnModuleInit, OnModuleDestroy {
                 pageChanged,
                 partsCache,
                 replayTrimmedToTokens,
+                // #520 Option B: mark the turn when recovery replayed BELOW the
+                // configured budget (only when it actually did).
+                replayBelowConfiguredBudget:
+                  replayBelowConfiguredBudget || undefined,
               }),
             );
             // #184/#487: the RUN is finalized ALWAYS (never gated on the message).
@@ -1981,7 +2011,16 @@ export class AiChatService implements OnModuleInit, OnModuleDestroy {
                 pageChanged,
                 partsCache,
                 replayTrimmedToTokens,
-                replayOverflow: overflow || undefined,
+                // #520: escalate the consecutive-overflow counter so the NEXT turn
+                // trims MORE aggressively (0.5**k). k grows by 1 each consecutive
+                // overflow; a clean finalize omits the field, resetting it to 0.
+                replayOverflowCount: overflow
+                  ? priorOverflowCount + 1
+                  : undefined,
+                // #520 Option B: mark the turn when THIS replay was already below the
+                // configured budget (only when it actually was).
+                replayBelowConfiguredBudget:
+                  replayBelowConfiguredBudget || undefined,
               }),
             );
             // #184: settle the RUN as failed, carrying the provider/transport cause.
@@ -2413,22 +2452,39 @@ export function seedActivatedTools(
 }
 
 /**
- * Whether the most recent assistant turn was rejected for CONTEXT OVERFLOW
- * (#490): its row carries `metadata.replayOverflow` (stamped by the stream's
- * onError). The next turn's budgeter reads this to trim aggressively — the
- * reactive recovery. Only the LAST assistant turn matters (an older overflow was
- * already recovered), so we stop at the first assistant row scanning backwards.
+ * How many CONSECUTIVE recent turns were rejected for CONTEXT OVERFLOW (#490/#520):
+ * `k`, read from the most recent assistant row's `metadata.replayOverflowCount`
+ * (stamped by the stream's onError, incremented each consecutive overflow and reset
+ * to 0 on any clean finalize). The next turn's budgeter feeds this to
+ * {@link resolveEffectiveReplayThreshold} to trim with ESCALATING aggression — the
+ * reactive recovery. Only the LAST assistant turn matters (its count already carries
+ * the consecutive streak; an older overflow followed by a clean turn was recovered),
+ * so we stop at the first assistant row scanning backwards.
+ *
+ * BACK-COMPAT: a row written by the pre-#520 boolean stamp (`replayOverflow: true`,
+ * no count) is read as k=1 — the old single 0.5× behavior — so in-flight chats do
+ * not regress across the deploy.
  */
-export function lastAssistantReplayOverflow(
+export function lastAssistantReplayOverflowCount(
   history: ReadonlyArray<AiChatMessage>,
-): boolean {
+): number {
   for (let i = history.length - 1; i >= 0; i--) {
     const row = history[i];
     if (row.role !== 'assistant') continue;
-    const meta = (row.metadata ?? {}) as { replayOverflow?: unknown };
-    return meta.replayOverflow === true;
+    const meta = (row.metadata ?? {}) as {
+      replayOverflowCount?: unknown;
+      replayOverflow?: unknown;
+    };
+    if (typeof meta.replayOverflowCount === 'number') {
+      // Guard against a corrupt/negative persisted value.
+      return meta.replayOverflowCount > 0
+        ? Math.floor(meta.replayOverflowCount)
+        : 0;
+    }
+    // Back-compat: legacy boolean stamp -> one overflow (0.5× cut).
+    return meta.replayOverflow === true ? 1 : 0;
   }
-  return false;
+  return 0;
 }
 
 /** The last message with role 'user' from a useChat payload, if any. */
@@ -3084,9 +3140,16 @@ export function flushAssistant(
     // the (estimated) token size it trimmed to — the UI can show "replay truncated
     // at N tokens". Omitted when nothing was trimmed.
     replayTrimmedToTokens?: number;
-    // #490 reactive branch: set when the provider rejected this turn for context
-    // overflow. Stamped into metadata so the NEXT turn's budgeter trims aggressively.
-    replayOverflow?: boolean;
+    // #490/#520 reactive branch: the consecutive context-overflow count for THIS
+    // turn (prior streak + 1) when the provider rejected it for context overflow.
+    // Stamped into metadata so the NEXT turn's budgeter trims with escalating
+    // aggression (0.5**k). Omitted (undefined) on a clean turn, which resets k to 0.
+    replayOverflowCount?: number;
+    // #520 Option B observability: true when recovery replayed this turn's history
+    // BELOW the admin-configured budget (the configured window did not fit and the
+    // anti-brick invariant cut past it). Omitted on a normal in-budget replay so the
+    // flag marks ONLY the "config is factually too large" case.
+    replayBelowConfiguredBudget?: boolean;
   },
 ): AssistantFlush {
   const finished = capturedSteps ?? [];
@@ -3139,7 +3202,10 @@ export function flushAssistant(
     metadata.maxContextTokens = extra.maxContextTokens;
   if (extra?.replayTrimmedToTokens)
     metadata.replayTrimmedToTokens = extra.replayTrimmedToTokens;
-  if (extra?.replayOverflow) metadata.replayOverflow = true;
+  if (extra?.replayOverflowCount && extra.replayOverflowCount > 0)
+    metadata.replayOverflowCount = extra.replayOverflowCount;
+  if (extra?.replayBelowConfiguredBudget)
+    metadata.replayBelowConfiguredBudget = true;
   if (extra?.error) metadata.error = extra.error;
   // Persist the page-change diff the agent saw this turn (#274 observability),
   // so history / the Markdown export can show what the user changed. Only when

apps/server/src/core/ai-chat/ai-chat.write-volume.int-spec.ts

@@ -1,6 +1,11 @@
 import { randomBytes } from 'crypto';
 import { Client } from 'pg';
-import { flushAssistant, serializeSteps } from './ai-chat.service';
+import {
+  flushAssistant,
+  serializeSteps,
+  lastAssistantReplayOverflowCount,
+} from './ai-chat.service';
+import type { AiChatMessage } from '@docmost/db/types/entity.types';
 
 /**
  * #490 write-volume regression — an OBSERVABLE-PROPERTY test on a LIVE Postgres,
@@ -207,3 +212,111 @@ describe('#490 write-volume on a live Postgres (pg_current_wal_lsn delta)', () =
     expect(v2).toBeLessThan(v1 * 0.75);
   }, 120_000);
 });
+
+/**
+ * #520 reactive-recovery COUNTER lifecycle on a LIVE Postgres — proves the
+ * consecutive-overflow count survives a real jsonb metadata round-trip (the persist
+ * path), not just an in-memory object. flushAssistant BUILDS the row metadata, we
+ * WRITE it to a jsonb column, READ it back, then reconstruct the assistant row and
+ * run lastAssistantReplayOverflowCount over it — exactly the read the next turn does.
+ *
+ * The lifecycle proven end-to-end through pg:
+ *   - consecutive overflows INCREMENT k (1 -> 2 -> 3);
+ *   - a CLEAN finalize omits the field, which the reader treats as a RESET to 0;
+ *   - a legacy boolean row (`replayOverflow: true`) reads back as k=1 (back-compat).
+ */
+describe('#520 overflow-counter lifecycle on a live Postgres (jsonb round-trip)', () => {
+  let client: Client | undefined;
+  let available = false;
+
+  beforeAll(async () => {
+    try {
+      client = new Client(CONN);
+      await client.connect();
+      await client.query('SELECT 1');
+      available = true;
+    } catch {
+      available = false;
+      client = undefined;
+    }
+  });
+
+  afterAll(async () => {
+    await client?.end().catch(() => undefined);
+  });
+
+  // Round-trip an arbitrary metadata object through a real jsonb column and read it
+  // back as the reconstructed assistant row the next turn would load.
+  async function roundTrip(
+    c: Client,
+    metadata: unknown,
+  ): Promise<AiChatMessage> {
+    await c.query('UPDATE _wal_counter SET metadata=$1 WHERE id=1', [
+      JSON.stringify(metadata),
+    ]);
+    const back = (await c.query('SELECT metadata FROM _wal_counter WHERE id=1'))
+      .rows[0].metadata as Record<string, unknown>;
+    return { role: 'assistant', metadata: back } as unknown as AiChatMessage;
+  }
+
+  it('increments across consecutive overflows, resets on a clean turn, and honors the legacy boolean', async () => {
+    if (!available || !client) {
+      console.warn('SKIP: gitmost-test-pg not reachable; skipping counter test.');
+      return;
+    }
+    const c = client;
+    await c.query('DROP TABLE IF EXISTS _wal_counter');
+    await c.query('CREATE TABLE _wal_counter(id int primary key, metadata jsonb)');
+    await c.query("INSERT INTO _wal_counter VALUES (1, '{}'::jsonb)");
+
+    // Turn 1 overflow: prior streak 0 -> stamp k=1 (as the service does: prior+1).
+    let prior = lastAssistantReplayOverflowCount([]); // fresh chat
+    expect(prior).toBe(0);
+    let row = await roundTrip(
+      c,
+      flushAssistant([], '', 'error', {
+        error: 'ctx',
+        replayOverflowCount: prior + 1,
+      }).metadata,
+    );
+    prior = lastAssistantReplayOverflowCount([row]);
+    expect(prior).toBe(1);
+
+    // Turn 2 overflow: prior 1 -> stamp k=2.
+    row = await roundTrip(
+      c,
+      flushAssistant([], '', 'error', {
+        error: 'ctx',
+        replayOverflowCount: prior + 1,
+      }).metadata,
+    );
+    prior = lastAssistantReplayOverflowCount([row]);
+    expect(prior).toBe(2);
+
+    // Turn 3 overflow: prior 2 -> stamp k=3.
+    row = await roundTrip(
+      c,
+      flushAssistant([], '', 'error', {
+        error: 'ctx',
+        replayOverflowCount: prior + 1,
+      }).metadata,
+    );
+    prior = lastAssistantReplayOverflowCount([row]);
+    expect(prior).toBe(3);
+
+    // Turn 4 CLEAN finalize: no overflow -> the field is omitted -> reset to 0.
+    row = await roundTrip(
+      c,
+      flushAssistant([], 'all good', 'completed', { finishReason: 'stop' })
+        .metadata,
+    );
+    expect('replayOverflowCount' in (row.metadata as object)).toBe(false);
+    expect(lastAssistantReplayOverflowCount([row])).toBe(0);
+
+    // Back-compat: a row persisted by the pre-#520 boolean stamp reads back as k=1.
+    row = await roundTrip(c, { replayOverflow: true });
+    expect(lastAssistantReplayOverflowCount([row])).toBe(1);
+
+    await c.query('DROP TABLE IF EXISTS _wal_counter');
+  }, 60_000);
+});

apps/server/src/core/ai-chat/history-budget.spec.ts

@@ -1,14 +1,146 @@
 import type { ModelMessage } from 'ai';
 import {
   resolveReplayBudget,
+  resolveEffectiveReplayThreshold,
   isContextOverflowError,
   estimateMessagesTokens,
   trimHistoryForReplay,
   REPLAY_BUDGET_DEFAULT_TOKENS,
+  REPLAY_BUDGET_WINDOW_FRACTION,
+  REPLAY_MIN_FLOOR_TOKENS,
   REPLAY_TRUNCATION_MARKER,
   REPLAY_TURN_COLLAPSED_MARKER,
 } from './history-budget';
 
+describe('resolveEffectiveReplayThreshold (#520 iterative escalation)', () => {
+  // The escalation table: each consecutive overflow (k) deepens the cut by 0.5×.
+  it('scales the base by 0.5**k, flooring (not rounding) fractional tokens', () => {
+    const base = 100_000;
+    expect(resolveEffectiveReplayThreshold(base, 0)).toBe(base); // k=0: unchanged
+    expect(resolveEffectiveReplayThreshold(base, 1)).toBe(50_000); // 0.5×
+    expect(resolveEffectiveReplayThreshold(base, 2)).toBe(25_000); // 0.25×
+    expect(resolveEffectiveReplayThreshold(base, 3)).toBe(12_500); // 0.125×
+    // Floors, not rounds.
+    expect(resolveEffectiveReplayThreshold(99_999, 1)).toBe(49_999);
+  });
+
+  it('passes a null base (trimming OFF) through unchanged for any k', () => {
+    for (const k of [0, 1, 2, 5, 100]) {
+      expect(resolveEffectiveReplayThreshold(null, k)).toBeNull();
+    }
+  });
+
+  // The crux of #520: convergence. A large k is clamped at REPLAY_MIN_FLOOR_TOKENS,
+  // so the escalation CONVERGES to a small-but-usable budget instead of trimming to
+  // zero — and, unlike the old fixed 0.5× that stuck at 50k, it drops far enough to
+  // fit a small real model window.
+  it('clamps a large k at the floor (converges, never below)', () => {
+    const base = 100_000;
+    for (const k of [4, 6, 10, 50, 200]) {
+      const t = resolveEffectiveReplayThreshold(base, k) as number;
+      expect(t).toBe(REPLAY_MIN_FLOOR_TOKENS);
+      expect(t).toBeGreaterThanOrEqual(REPLAY_MIN_FLOOR_TOKENS);
+    }
+  });
+
+  // Residual-brick regression (#520): flat-default base 100k, real window ~40k. The
+  // OLD fixed single 0.5× stuck at 50k > 40k forever (re-overflows every turn — the
+  // brick). The iterative cut drops BELOW 40k after a couple more consecutive
+  // overflows, so the history finally fits and the chat un-bricks.
+  it('un-bricks: escalation drops below a small real window the fixed 0.5× never could', () => {
+    const base = 100_000;
+    const realWindow = 40_000;
+    // The old terminal state: 0.5× = 50k, still above the window.
+    expect(resolveEffectiveReplayThreshold(base, 1)).toBeGreaterThan(realWindow);
+    // Escalation converges under the window.
+    const converged = [2, 3, 4, 5].some(
+      (k) => (resolveEffectiveReplayThreshold(base, k) as number) < realWindow,
+    );
+    expect(converged).toBe(true);
+    // MUTATION SENTINEL: reverting `** k` to `** 1` (fixed 0.5×) makes every k yield
+    // 50k, so `converged` above would be FALSE and this test reddens. Removing the
+    // floor reddens the clamp test instead.
+  });
+
+  // "Don't INFLATE above itself" is still an invariant: the floor never RAISES a
+  // legitimately small configured budget above itself (that would re-overflow the
+  // very window it was set for). Under #520 Option B the floor is min(FLOOR,
+  // floor(0.5×base)), so for a base BELOW the floor recovery MAY cut it further —
+  // down to floor(0.5×base), i.e. AT LEAST the old single 0.5× cut — but never above.
+  it('never inflates a small configured budget above itself (may cut below it, #520 Option B)', () => {
+    const small = 5_000; // below REPLAY_MIN_FLOOR_TOKENS
+    const floor = Math.min(REPLAY_MIN_FLOOR_TOKENS, Math.floor(small * 0.5)); // 2500
+    expect(resolveEffectiveReplayThreshold(small, 0)).toBe(small); // k=0 unchanged
+    for (const k of [1, 2, 3, 10]) {
+      const t = resolveEffectiveReplayThreshold(small, k) as number;
+      // Invariant: never RAISED above the configured budget.
+      expect(t).toBeLessThanOrEqual(small);
+      // Option B: never trimmed below the absolute floor (converges).
+      expect(t).toBeGreaterThanOrEqual(floor);
+    }
+    // The old single 0.5× cut is reached (and pinned) — recovery is never WORSE than
+    // before, and DOES cut below the configured budget on overflow (Option B). Under
+    // the old floor==budget behavior this would be `small` (5000), not `floor`.
+    expect(resolveEffectiveReplayThreshold(small, 1)).toBe(floor);
+  });
+
+  // #520 Option B: with a configured window (NOT the flat default), repeated overflow
+  // escalates the replay budget BELOW the configured budget, down to the absolute
+  // floor — the chat must not brick even when the configured window is too large for
+  // the model. A CLEAN turn (k back to 0) restores the full configured budget.
+  it('escalates below the configured budget down to the floor, and resets on a clean turn', () => {
+    // Configured context window 8000 -> budget = floor(0.7 × 8000) = 5600 (the code's
+    // window->budget ratio; compute it, do not hardcode).
+    const window = 8_000;
+    const budget = resolveReplayBudget(window).thresholdTokens as number;
+    expect(budget).toBe(Math.floor(REPLAY_BUDGET_WINDOW_FRACTION * window)); // 5600
+
+    // The absolute floor for this budget = min(FLOOR, floor(0.5 × budget)) = 2800
+    // (a "small window": 0.5×budget < REPLAY_MIN_FLOOR_TOKENS), which is BELOW the
+    // 5600 configured budget.
+    const floor = Math.min(
+      REPLAY_MIN_FLOOR_TOKENS,
+      Math.floor(budget * 0.5),
+    ); // 2800
+    expect(floor).toBe(2_800);
+    expect(floor).toBeLessThan(budget); // below the configured budget
+
+    // k=0 -> full configured budget (no overflow yet).
+    expect(resolveEffectiveReplayThreshold(budget, 0)).toBe(budget);
+    // k=1 -> cut BELOW the configured budget to the 0.5× floor (2800). This is the
+    // MUTATION SENTINEL: with the OLD floor==configured-budget behavior this would be
+    // max(2800, 5600) = 5600 (never below budget), so the assertion reddens.
+    expect(resolveEffectiveReplayThreshold(budget, 1)).toBe(floor);
+    expect(resolveEffectiveReplayThreshold(budget, 1)).toBeLessThan(budget);
+    // k>=2 stays at the floor (converges, never below it).
+    for (const k of [2, 3, 5, 20]) {
+      expect(resolveEffectiveReplayThreshold(budget, k)).toBe(floor);
+    }
+
+    // A CLEAN turn resets k to 0 -> the full configured budget is restored (recovery
+    // is not sticky; it only bites while the provider keeps proving non-fit).
+    expect(resolveEffectiveReplayThreshold(budget, 0)).toBe(budget);
+  });
+
+  // #520 Option B, LARGE window: a big configured budget escalates in DISTINCT steps
+  // below itself, converging to the fixed absolute floor REPLAY_MIN_FLOOR_TOKENS.
+  it('a large configured budget escalates below itself down to REPLAY_MIN_FLOOR_TOKENS', () => {
+    const budget = resolveReplayBudget(200_000).thresholdTokens as number; // 140000
+    // The floor for a large window is the fixed REPLAY_MIN_FLOOR_TOKENS (8k), well
+    // BELOW the configured budget.
+    expect(
+      Math.min(REPLAY_MIN_FLOOR_TOKENS, Math.floor(budget * 0.5)),
+    ).toBe(REPLAY_MIN_FLOOR_TOKENS);
+    const seq = [0, 1, 2, 3, 4, 5, 6].map(
+      (k) => resolveEffectiveReplayThreshold(budget, k) as number,
+    );
+    expect(seq).toEqual([140_000, 70_000, 35_000, 17_500, 8_750, 8_000, 8_000]);
+    // Every escalated step (k>=1) is below the configured budget; convergence floor.
+    for (const t of seq.slice(1)) expect(t).toBeLessThan(budget);
+    expect(seq[seq.length - 1]).toBe(REPLAY_MIN_FLOOR_TOKENS);
+  });
+});
+
 describe('resolveReplayBudget', () => {
   it('uses floor(0.7 x window) for a configured window (no cap)', () => {
     // 0.7 x 60k = 42k

apps/server/src/core/ai-chat/history-budget.ts

@@ -22,10 +22,35 @@ export const REPLAY_BUDGET_DEFAULT_TOKENS = 100_000;
 /** Fraction of a configured context window used as the budget. */
 export const REPLAY_BUDGET_WINDOW_FRACTION = 0.7;
 /**
- * Fraction of the normal budget used for the REACTIVE re-trim after a provider
- * context-overflow 400 — the preventive estimate under-counted, so cut harder.
+ * Per-step fraction of the normal budget applied on the REACTIVE re-trim after a
+ * provider context-overflow 400 — the preventive estimate under-counted, so cut
+ * harder. This is now applied ITERATIVELY: with `k` consecutive overflow turns the
+ * budget is scaled by `fraction ** k` (k=1 -> 0.5×, k=2 -> 0.25×, …), so recovery
+ * ESCALATES turn over turn until the replayed history finally fits, instead of the
+ * old single fixed 0.5× cut that could never un-brick a chat whose real model
+ * window is smaller than 0.5 × the (unconfigured, flat-default) base budget (#520).
  */
 export const REPLAY_AGGRESSIVE_FRACTION = 0.5;
+/**
+ * Absolute lower bound (tokens) on the escalating reactive budget: the iterative
+ * cut is clamped here so it CONVERGES (a fixed floor, not an ever-shrinking value
+ * that would eventually trim everything). Rationale: below ~8k tokens a chat cannot
+ * carry meaningful recent context, and even a small real model window comfortably
+ * fits this much — keep-recent-turns still applies on top, so a handful of recent
+ * turns survive.
+ *
+ * #520 Option B: for a LARGE configured window this floor sits BELOW the configured
+ * replay budget, and recovery is allowed to escalate PAST the configured budget down
+ * to it — "the chat must not brick on overflow" is an INVARIANT of the reactive
+ * branch, and a configured window is a claim about model capacity, not a promise
+ * about replay size; once the provider proves non-fit with a 400, reality beats the
+ * config. This does NOT change the NORMAL path's upper bound (#510 Option A still
+ * respects the configured budget while it fits) — it is survival once non-fit is
+ * proven. For a SMALL configured window the effective floor is instead the old
+ * single 0.5× cut (never worse than before, and never RAISED above the budget); see
+ * {@link resolveEffectiveReplayThreshold}.
+ */
+export const REPLAY_MIN_FLOOR_TOKENS = 8_000;
 /**
  * Turns (a user message + its assistant/tool replies) kept FULL at the tail,
  * including the current one — never trimmed. Older turns are compacted first.
@@ -85,22 +110,48 @@ export function resolveReplayBudget(rawContextWindow: unknown): ReplayBudget {
 }
 
 /**
- * The effective replay threshold for THIS turn, given the base budget and whether
- * the PREVIOUS turn hit a context-overflow 400 (the reactive-recovery signal,
- * `metadata.replayOverflow`). On recovery the base budget is scaled down by
- * {@link REPLAY_AGGRESSIVE_FRACTION}: the overflowing turn produced no usage
- * signal, so the preventive estimate under-counted and a normal-threshold trim may
- * not shrink enough to fit — this harder cut is what un-bricks the chat.
+ * The effective replay threshold for THIS turn, given the base budget and `k` — the
+ * number of CONSECUTIVE preceding turns that hit a context-overflow 400 (the
+ * reactive-recovery signal `metadata.replayOverflowCount`, read from the last
+ * assistant row). On recovery the base budget is scaled down ITERATIVELY by
+ * {@link REPLAY_AGGRESSIVE_FRACTION} ** k and clamped at {@link REPLAY_MIN_FLOOR_TOKENS}:
+ *   - k=0 -> base unchanged (no overflow: nothing to recover from).
+ *   - k=1 -> floor(0.5 × base); k=2 -> floor(0.25 × base); … each further consecutive
+ *     overflow tightens the cut, so recovery ESCALATES until the history fits.
+ *   - the escalation is clamped at the floor so it CONVERGES — this is what un-bricks
+ *     a chat whose real model window is smaller than a single 0.5× cut of the base
+ *     (e.g. an unconfigured window: flat-default base 100k, real window <50k) (#520).
+ *
+ * The overflowing turn produced no usage signal, so the preventive estimate
+ * under-counted and a normal-threshold (or single fixed 0.5×) trim may not shrink
+ * enough to fit; the escalating cut is what recovers such a chat.
  *
  * A `null` base budget (trimming OFF) is passed through unchanged: an explicit
  * off-switch is never overridden by the recovery path.
+ *
+ * The absolute floor is `min(REPLAY_MIN_FLOOR_TOKENS, floor(0.5 × base))` (#520
+ * Option B):
+ *   - LARGE window (floor(0.5 × base) >= REPLAY_MIN_FLOOR_TOKENS) -> the fixed
+ *     REPLAY_MIN_FLOOR_TOKENS, which is BELOW the configured budget: escalation is
+ *     ALLOWED to cut past the configured budget down to this absolute minimum, so a
+ *     chat whose real model window is far smaller than the configured window still
+ *     un-bricks (the invariant beats a config reality disproved with a 400).
+ *   - SMALL window (floor(0.5 × base) < REPLAY_MIN_FLOOR_TOKENS) -> floor(0.5 ×
+ *     base), i.e. AT LEAST the old single 0.5× cut: recovery is never WORSE than the
+ *     pre-#520 behavior, and the floor is still never RAISED above the configured
+ *     budget itself (that would re-overflow the very window it was set for).
  */
 export function resolveEffectiveReplayThreshold(
   thresholdTokens: number | null,
-  priorOverflowed: boolean,
+  k: number,
 ): number | null {
-  if (!priorOverflowed || thresholdTokens == null) return thresholdTokens;
-  return Math.floor(thresholdTokens * REPLAY_AGGRESSIVE_FRACTION);
+  if (thresholdTokens == null || k <= 0) return thresholdTokens;
+  const scaled = Math.floor(thresholdTokens * REPLAY_AGGRESSIVE_FRACTION ** k);
+  const floor = Math.min(
+    REPLAY_MIN_FLOOR_TOKENS,
+    Math.floor(thresholdTokens * REPLAY_AGGRESSIVE_FRACTION),
+  );
+  return Math.max(scaled, floor);
 }
 
 /**

apps/server/src/core/ai-chat/tools/ai-chat-tools.service.ts

@@ -106,6 +106,7 @@ function __assertClientCallContract(client: DocmostClientLike): void {
   void client.sharePage(s, true);
   void client.unsharePage(s);
   void client.restorePageVersion(s);
+  void client.savePageVersion(s);
   void client.transformPage(s, s, { dryRun: true });
   void client.stashPage(s);
   // --- write (image / footnote), in-app since #410 ---

apps/server/src/core/ai-chat/tools/docmost-client.loader.ts

@@ -58,6 +58,7 @@ type DocmostClientMethod =
   | 'sharePage'
   | 'unsharePage'
   | 'restorePageVersion'
+  | 'savePageVersion'
   | 'transformPage'
   | 'stashPage'
   // --- write (image / footnote), in-app since #410 ---

packages/mcp/src/client/pages.ts

@@ -11,6 +11,7 @@ import {
   markdownToProseMirror,
   markdownToProseMirrorCanonical,
   mutatePageContent,
+  savePageVersionRealtime,
   assertYjsEncodable,
   MutationResult,
 } from "../lib/collaboration.js";
@@ -55,6 +56,7 @@ export interface IPagesMixin {
   listPageHistory(pageId: string, cursor?: string): any;
   getPageHistory(historyId: string): any;
   restorePageVersion(historyId: string): any;
+  savePageVersion(pageId: string): any;
   diffPageVersions(pageId: string, from?: string, to?: string): any;
 }
 
@@ -587,6 +589,24 @@ export function PagesMixin<TBase extends GConstructor<DocmostClientContext>>(Bas
     };
   }
 
+  /**
+   * Save an intentional NAMED version of a page's CURRENT live content (#370).
+   * The write goes over the same agent-authenticated collab session content edits
+   * use, so the server derives kind='agent' from the signed actor. Resolves a
+   * SaveVersionResult: `{ saved:true, historyId, kind, alreadySaved }` on success,
+   * or `{ saved:false, skipped:true, reason }` when the server had nothing to pin
+   * (e.g. an empty page). A stale/missing pageId throws (not a benign skip).
+   */
+  async savePageVersion(pageId: string) {
+    const collabToken = await this.getCollabTokenWithReauth();
+    const pageUuid = await this.resolvePageId(pageId);
+    // Self-heal a rejected WS handshake once (#486): re-mint the collab token and
+    // retry, symmetric to the content-write path.
+    return this.writeWithCollabAuthRetry(collabToken, (token) =>
+      savePageVersionRealtime(pageUuid, token, this.apiUrl),
+    );
+  }
+
   /**
    * Diff two versions of a page and return a Docmost-equivalent change set.
    * `from`/`to` each resolve to a ProseMirror doc:

packages/mcp/src/lib/collab-session.ts

@@ -139,7 +139,13 @@ export interface CollabProviderLike {
   unsyncedChanges: number;
   destroy(): void;
   on(event: "unsyncedChanges", handler: (data: { number: number }) => void): void;
+  on(event: "stateless", handler: (data: { payload: string }) => void): void;
   off(event: "unsyncedChanges", handler: (data: { number: number }) => void): void;
+  off(event: "stateless", handler: (data: { payload: string }) => void): void;
+  // Send a stateless (out-of-band, non-doc) message to the server. Used by the
+  // #370 explicit save-version path (payload `{type:'save-version'}`); the server
+  // replies with a broadcast `{type:'version.saved', …}` on the same channel.
+  sendStateless(payload: string): void;
 }
 
 /** The configuration object passed to the provider factory. */
@@ -564,6 +570,125 @@ export class CollabSession {
     });
   }
 
+  /**
+   * Send a stateless message over the live collaboration connection and resolve
+   * with the FIRST reply whose parsed payload satisfies `predicate`, rejecting on
+   * a bounded `timeoutMs`.
+   *
+   * Used by the #370 explicit save-version path: the client sends
+   * `{type:'save-version'}` and awaits the server's broadcast
+   * `{type:'version.saved', historyId, kind, alreadySaved}`. The stateless channel
+   * (not a REST read) is deliberate — the server versions the LIVE in-memory ydoc,
+   * which the up-to-10s-stale page row would not yet reflect.
+   *
+   * `predicate` receives each incoming stateless message (already JSON-parsed) and
+   * returns the resolved value for a match or `undefined` to keep waiting; a
+   * malformed / unrelated payload is ignored. The listener is registered BEFORE
+   * the send so a fast reply is never missed.
+   *
+   * Lifecycle mirrors mutate(): it registers through `inflightReject` so a
+   * disconnect/close/auth-failure/teardown rejects THIS wait with the same
+   * connection-loss error, refuses to run on a non-ready session, fails fast on a
+   * concurrent in-flight op (the caller MUST hold the per-page lock), and re-arms
+   * the idle TTL (or self-destroys an ephemeral session) on completion.
+   *
+   * NOTE: the server broadcast carries no request-correlation id, so under a
+   * genuinely concurrent save on the SAME page (e.g. a human Cmd+S racing the
+   * agent) this resolves on whichever `version.saved` arrives first. The per-page
+   * lock serializes THIS process's saves; a cross-client race is inherent to the
+   * broadcast design and is benign (the result still describes a real save of this
+   * page's current content, and the server's save is promote-not-duplicate).
+   */
+  sendStatelessAndAwait<T>(
+    payload: string,
+    predicate: (message: any) => T | undefined,
+    timeoutMs: number,
+  ): Promise<T> {
+    // Belt-and-suspenders (acquire already validated): refuse to send on a
+    // session that is not in a live, synced, ready state.
+    if (
+      this.dead ||
+      this.state !== "ready" ||
+      this.connectionLost ||
+      !this.provider ||
+      this.provider.synced !== true
+    ) {
+      return Promise.reject(
+        new Error("Collaboration session is not in a ready state"),
+      );
+    }
+
+    // Fail-fast on concurrent use: a second overlapping op would overwrite the
+    // first's inflightReject and hang it on disconnect (same guard as mutate).
+    if (this.inflightReject) {
+      return Promise.reject(
+        new Error(
+          "stateless op already in-flight; caller must serialize (hold the page lock)",
+        ),
+      );
+    }
+
+    return new Promise<T>((resolve, reject) => {
+      let settled = false;
+      let timer: ReturnType<typeof setTimeout> | undefined;
+      let statelessHandler: ((data: { payload: string }) => void) | undefined;
+
+      const localFinish = (err: Error | null, value?: T) => {
+        if (settled) return;
+        settled = true;
+        if (timer) clearTimeout(timer);
+        if (statelessHandler && this.provider) {
+          try {
+            this.provider.off("stateless", statelessHandler);
+          } catch (e) {}
+        }
+        this.inflightReject = undefined;
+        if (err) reject(err);
+        else resolve(value as T);
+        // Post-settle lifecycle, identical to mutate's localFinish.
+        if (this.ephemeral) {
+          this.destroy("ephemeral op complete");
+        } else if (!this.dead) {
+          this.armIdle();
+        }
+      };
+
+      // Register so a disconnect/close/auth-failure/teardown rejects THIS op with
+      // the connection-loss error text (the `settled` guard makes a racing
+      // teardown + normal resolve safe — first one wins).
+      this.inflightReject = (e: Error) => localFinish(e);
+
+      // Register the reply listener BEFORE sending so a fast server broadcast is
+      // never missed.
+      statelessHandler = (data: { payload: string }) => {
+        if (settled) return;
+        let message: any;
+        try {
+          message = JSON.parse(data.payload);
+        } catch {
+          return; // unrelated / malformed stateless message — keep waiting
+        }
+        const matched = predicate(message);
+        if (matched !== undefined) localFinish(null, matched);
+      };
+      this.provider!.on("stateless", statelessHandler);
+
+      timer = setTimeout(() => {
+        localFinish(
+          new Error(
+            `Timeout waiting for a stateless reply from the collaboration server ${this.hint()}`,
+          ),
+        );
+      }, timeoutMs);
+
+      try {
+        this.provider!.sendStateless(payload);
+      } catch (e) {
+        localFinish(e instanceof Error ? e : new Error(String(e)));
+      }
+    });
+  }
+
   /** (Re)arm the idle TTL so the clock starts from the most recent activity. */
   armIdle(): void {
     if (this.dead || this.ephemeral) return;

packages/mcp/src/lib/collaboration.ts

@@ -324,6 +324,146 @@ export async function mutatePageContent(
   });
 }
 
+/**
+ * Stateless-channel message types for the #370 explicit save-version handshake.
+ * These MUST match the server constants in
+ * apps/server/src/collaboration/extensions/persistence.extension.ts
+ * (SAVE_VERSION_MESSAGE_TYPE and the VERSION_SAVED / VERSION_SKIPPED replies) —
+ * the mcp package cannot import server code, so the literals are duplicated here.
+ * KEEP THE TWO SIDES IN SYNC: the server broadcasts exactly ONE terminal reply per
+ * handled save (`version.saved` for a real save/promote, `version.skipped` for a
+ * reachable no-op — an empty page or a missing page row); the client must match
+ * BOTH or it waits out the ack timeout on the skip case and misreports a healthy
+ * server as unreachable (#370 F2).
+ */
+const SAVE_VERSION_MESSAGE_TYPE = "save-version";
+const VERSION_SAVED_MESSAGE_TYPE = "version.saved";
+const VERSION_SKIPPED_MESSAGE_TYPE = "version.skipped";
+
+/**
+ * Bounded wait for the server's terminal reply after we ask it to save a version.
+ * The server flushes the live ydoc through its store path and writes a history row
+ * inside a DB transaction before broadcasting, so allow the same headroom as a
+ * persistence ack; reject (do NOT hang) past it. A timeout here means NO reply at
+ * all arrived — the genuine "collab server unreachable/overloaded" case — as
+ * distinct from a `version.skipped` reply, which resolves immediately.
+ */
+const SAVE_VERSION_ACK_TIMEOUT_MS = 20000;
+
+/**
+ * The resolved outcome of an explicit save-version, surfaced to the tool caller.
+ * `saved:true` → a version was created or promoted (historyId/kind/alreadySaved
+ * are present). `saved:false` → the server had nothing to pin (a reachable no-op,
+ * e.g. an empty page); `skipped` + `reason` explain why. A page-not-found reply is
+ * NOT represented here — it is surfaced as a thrown error (a bad/stale pageId).
+ */
+export interface SaveVersionResult {
+  saved: boolean;
+  historyId?: string;
+  kind?: string;
+  alreadySaved?: boolean;
+  skipped?: boolean;
+  reason?: string;
+}
+
+/**
+ * Parsed terminal reply the predicate hands back to savePageVersionRealtime. Kept
+ * internal: it carries the page-not-found case (mapped to a thrown error, never a
+ * returned result) that SaveVersionResult deliberately does not model.
+ */
+type SaveVersionReply =
+  | { outcome: "saved"; historyId: string; kind: string; alreadySaved: boolean }
+  | { outcome: "skipped"; reason: string };
+
+/** Match the server's terminal reply (version.saved / version.skipped), ignoring
+ *  any unrelated / cross-page stateless message so the wait is not resolved by
+ *  noise. Returns `undefined` to keep waiting (#370 F1 predicate coverage). */
+function matchSaveVersionReply(message: any): SaveVersionReply | undefined {
+  if (!message || typeof message !== "object") return undefined;
+  if (message.type === VERSION_SAVED_MESSAGE_TYPE) {
+    return {
+      outcome: "saved",
+      historyId: String(message.historyId),
+      kind: String(message.kind),
+      alreadySaved: !!message.alreadySaved,
+    };
+  }
+  if (message.type === VERSION_SKIPPED_MESSAGE_TYPE) {
+    return { outcome: "skipped", reason: String(message.reason ?? "unknown") };
+  }
+  return undefined;
+}
+
+/**
+ * Save an intentional version of a page's CURRENT live collaboration content
+ * (#370). Runs under the per-page lock, acquires the SAME cached CollabSession the
+ * content writes use (#400) — so it authenticates with the caller's agent collab
+ * token, and the server derives kind='agent' from that signed actor — then sends a
+ * `{type:'save-version'}` stateless message and awaits the server's terminal reply
+ * (`version.saved` or `version.skipped`) on the same channel.
+ *
+ * Deliberately does NOT read `pages.content` over REST: the versioned content is
+ * the live in-memory ydoc, which the debounced (up-to-10s-stale) page row would
+ * not yet reflect. The stateless round-trip is what makes the save exact.
+ *
+ * Outcomes:
+ *   - a real save/promote → `{ saved:true, historyId, kind, alreadySaved }`;
+ *   - the server had nothing to pin (empty page) → `{ saved:false, skipped:true,
+ *     reason:'empty' }` — a clean, immediate no-op, NOT a stall;
+ *   - the page row is gone (a stale/bad pageId) → a thrown error, immediate and
+ *     truthful (not the health-timeout path);
+ *   - no reply within the timeout → a thrown timeout error (the genuine "server
+ *     unreachable/overloaded" case).
+ *
+ * On a TRANSPORT failure (timeout / disconnect) the session is destroyed so the
+ * next call reconnects fresh; a page-not-found is a healthy-connection terminal
+ * reply, so the session is left cached. A save is safe to retry — the server
+ * promotes-not-duplicates an identical latest version — so the caller (and its
+ * agent) may re-issue it without risking a duplicate heavy history row.
+ */
+export async function savePageVersionRealtime(
+  pageId: PageId,
+  collabToken: string,
+  baseUrl: string,
+): Promise<SaveVersionResult> {
+  return withPageLock(pageId, async () => {
+    const session = await acquireCollabSession(pageId, collabToken, baseUrl);
+    let reply: SaveVersionReply;
+    try {
+      reply = await session.sendStatelessAndAwait<SaveVersionReply>(
+        JSON.stringify({ type: SAVE_VERSION_MESSAGE_TYPE }),
+        matchSaveVersionReply,
+        SAVE_VERSION_ACK_TIMEOUT_MS,
+      );
+    } catch (e) {
+      // TRANSPORT failure (no reply within the timeout, or a disconnect): drop the
+      // session so the next call reconnects fresh.
+      session.destroy("save-version failed");
+      throw e;
+    }
+    // A terminal reply arrived over a healthy connection — do NOT destroy the
+    // session; interpret the outcome.
+    if (reply.outcome === "skipped") {
+      if (reply.reason === "page-not-found") {
+        // A resolved pageId that the collab server no longer holds (deleted, or a
+        // stale id). Surface it immediately and truthfully, not as a health error.
+        throw new Error(
+          `savePageVersion: page ${pageId} was not found on the collaboration ` +
+            `server (it may have been deleted) — nothing was saved.`,
+        );
+      }
+      // Reachable benign no-op (e.g. an empty page): a clean result, not a throw.
+      return { saved: false, skipped: true, reason: reply.reason };
+    }
+    return {
+      saved: true,
+      historyId: reply.historyId,
+      kind: reply.kind,
+      alreadySaved: reply.alreadySaved,
+    };
+  });
+}
+
 /**
  * Replace the live content of a page over the collaboration websocket.
  * Accepts a ready ProseMirror JSON document; the caller controls whether

packages/mcp/src/server-instructions.ts

@@ -44,7 +44,7 @@ export const ROUTING_PROSE =
   "EDIT: fix wording/typos/numbers -> editPageText (find/replace inside blocks, no node id needed). Edit a block -> getNode(markdown) -> edit the markdown -> patchNode(markdown) (by attrs.id from getOutline; the markdown fragment may be several blocks — a 1->N section rewrite in one call, the first block keeps the id). Reach for patchNode's `node`-JSON only for fine attr/mark work; a table cell with spans/colors/fixed width -> the table tools (patchNode markdown refuses it). Add a block -> insertNode (markdown, before/after a block by attrs.id or by anchor text, or append; `node` for raw JSON or bare table structure). Remove a block -> deleteNode (by attrs.id). Tables -> tableGet / tableUpdateCell / tableInsertRow / tableDeleteRow (address by \"#<index>\" from getOutline; table nodes have no attrs.id). Images -> insertImage (add from a web URL) / replaceImage (swap an existing image). Draw.io diagrams -> PREFER the high-level semantic tools that hide coordinates/styles: drawioFromGraph (architecture/cloud/network diagrams — describe nodes/groups/edges by kind+icon, the server picks layout, colors and verified icons; hints layer/sameLayerAs/pinned and layout:full|incremental|none) and drawioFromMermaid (standard flowcharts — write Mermaid, get an editable diagram). For targeted tweaks of an existing diagram use drawioEditCells (id-based add/update/delete with cascade delete + baseHash lock). Raw mxGraph XML via drawioCreate/drawioUpdate is the escape-hatch for exotic/wireframe diagrams; drawioGet reads a diagram as mxGraph XML + a hash (pass it as baseHash to drawioUpdate/drawioEditCells for optimistic locking). Before authoring raw XML, drawioShapes (look up verified stencil style-strings so a shape name never renders as an empty box) and drawioGuide (on-demand authoring reference: skeleton/layout/containers/icons-aws/icons-azure), and pass layout:\"elk\" to drawioCreate/drawioUpdate to auto-place nodes. Footnotes -> insertFootnote. Bulk/structural rewrite -> updatePageJson (full ProseMirror replace) or updatePageMarkdown (full plain-Markdown body replace, re-imported — block ids regenerate); prefer the granular tools above to avoid resending the whole ~100KB+ document. Complex/scripted rewrite (multiple coordinated edits, renumbering) -> docmostTransform: write a JS `(doc, ctx) => doc` transform, preview the diff with dryRun (default), then apply with dryRun:false; ctx.helpers includes commentsToFootnotes for turning inline comments into numbered footnotes.\n" +
   "PAGES: new -> createPage (Markdown). Rename (title only) -> renamePage. Move -> movePage. Delete -> deletePage (SOFT delete — the page goes to trash and is restorable; nothing is permanent). Copy/replace a page's whole content from another page (server-side, no document through the model) -> copyPageContent. Sharing -> sharePage / unsharePage / listShares; sharePage makes the page PUBLICLY accessible — do it only when explicitly asked.\n" +
   "COMMENTS: createComment is always inline and requires an EXACT selection — contiguous text from a single block, <=250 chars (fails rather than leaving an unanchored comment); reply to a thread via parentCommentId. Propose a concrete text fix for one-click human approval -> createComment with suggestedText (the exact plain-text replacement for the selection; the selection must then be UNIQUE in the page — extend it with context if needed); prefer this over editing directly when the change is subjective or needs the author's sign-off. Manage -> listComments, updateComment, resolveComment (resolve/reopen, reversible — prefer over delete to close), deleteComment, checkNewComments.\n" +
-  "HISTORY: review what changed -> diffPageVersions (a historyId vs current, or two versions). List saved versions -> listPageHistory. Undo a bad edit -> restorePageVersion (writes a past version back as current; itself revertible). Export a page to self-contained Docmost Markdown (with comment anchors) -> exportPageMarkdown.";
+  "HISTORY: review what changed -> diffPageVersions (a historyId vs current, or two versions). List saved versions -> listPageHistory. Undo a bad edit -> restorePageVersion (writes a past version back as current; itself revertible). Pin the page's CURRENT content as a restorable named checkpoint when you finish a coherent editing pass -> savePageVersion (kind derived server-side as an agent version; an identical-to-last save is promoted/no-op'd, so a redundant call is harmless). Export a page to self-contained Docmost Markdown (with comment anchors) -> exportPageMarkdown.";
 
 /**
  * Non-tool camelCase identifiers that legitimately appear in ROUTING_PROSE:
@@ -218,6 +218,7 @@ const TOOL_FAMILY: Record<string, Family> = {
   diffPageVersions: "HISTORY",
   listPageHistory: "HISTORY",
   restorePageVersion: "HISTORY",
+  savePageVersion: "HISTORY",
   exportPageMarkdown: "HISTORY",
   // importPageMarkdown is now inAppOnly (#411) — it is not registered on the
   // external MCP host, so it no longer appears in the generated inventory.

packages/mcp/src/tool-specs.ts

@@ -93,6 +93,7 @@ export type DocmostClientLike = Pick<
   | 'sharePage'
   | 'unsharePage'
   | 'restorePageVersion'
+  | 'savePageVersion'
   | 'stashPage'
   | 'insertFootnote'
   | 'insertImage'
@@ -743,6 +744,30 @@ export const SHARED_TOOL_SPECS = {
       client.restorePageVersion(historyId as string),
   },
 
+  savePageVersion: {
+    mcpName: 'savePageVersion',
+    inAppKey: 'savePageVersion',
+    writeClass: 'write',
+    description:
+      'Save an intentional, NAMED version (kind=agent) of the page\'s CURRENT ' +
+      'live content — a restorable checkpoint pinned into its history. Call it ' +
+      'when you have FINISHED a coherent editing pass (not after every small ' +
+      'edit), so the reader can see and roll back to the state you left. The ' +
+      'version type is derived SERVER-SIDE from your signed agent identity (you ' +
+      'cannot mislabel it); a save whose content is IDENTICAL to the last saved ' +
+      'version is promoted/no-op\'d server-side, so a redundant call is harmless ' +
+      'and never duplicates a version. Returns { saved:true, historyId, kind, ' +
+      'alreadySaved } on success, or { saved:false, skipped:true, reason:\'empty\' } ' +
+      'when the page had nothing to pin (e.g. it was empty).',
+    tier: 'deferred',
+    catalogLine:
+      'savePageVersion — pin the page\'s current content as a named agent version (restorable checkpoint).',
+    buildShape: (z) => ({
+      pageId: z.string().min(1),
+    }),
+    execute: (client, { pageId }) => client.savePageVersion(pageId as string),
+  },
+
   // --- markdown round-trip ---
 
   importPageMarkdown: {

packages/mcp/test/unit/save-page-version.test.mjs

@@ -0,0 +1,300 @@
+import { test, beforeEach, afterEach, mock } from "node:test";
+import assert from "node:assert/strict";
+import { EventEmitter } from "node:events";
+
+import {
+  acquireCollabSession,
+  destroyAllSessions,
+  __setCollabProviderFactory,
+} from "../../build/lib/collab-session.js";
+import { savePageVersionRealtime } from "../../build/lib/collaboration.js";
+
+// #370 — unit coverage for the MCP client transport of the explicit save-version.
+// There is no collaboration server in the test env, so a fake HocuspocusProvider
+// drives the stateless round-trip: it auto-completes the connect/sync handshake on
+// a microtask (like the real provider), records sends, and either auto-broadcasts a
+// configured reply (`opts.reply`) or lets the test emit stateless messages /
+// disconnects by hand (`_emitStateless` / `_disconnect`) to exercise the predicate
+// filter, the teardown-mid-wait path, and the timeout.
+class FakeProvider extends EventEmitter {
+  static instances = [];
+
+  static reset() {
+    FakeProvider.instances = [];
+  }
+
+  static last() {
+    return FakeProvider.instances[FakeProvider.instances.length - 1];
+  }
+
+  constructor(config, opts = {}) {
+    super();
+    this.config = config;
+    this.synced = false;
+    this.unsyncedChanges = 0;
+    this.destroyed = false;
+    this.sent = [];
+    this.opts = opts;
+    FakeProvider.instances.push(this);
+    // Real HocuspocusProvider fires onSynced asynchronously after the handshake;
+    // a microtask reproduces that without depending on timers (so mock.timers on
+    // setTimeout does not stall the connect).
+    queueMicrotask(() => {
+      if (this.destroyed) return;
+      this.config.onConnect?.();
+      this.synced = true;
+      this.config.onSynced?.();
+    });
+  }
+
+  destroy() {
+    this.destroyed = true;
+  }
+
+  sendStateless(payload) {
+    this.sent.push(payload);
+    const reply = this.opts.reply;
+    if (!reply) return; // silent → the caller times out, or the test drives it
+    // Broadcast the configured server reply on a microtask, mirroring
+    // document.broadcastStateless landing back on this provider's `stateless` event.
+    queueMicrotask(() => {
+      if (this.destroyed) return;
+      this.emit("stateless", { payload: JSON.stringify(reply) });
+    });
+  }
+
+  // --- test drivers ---
+  _emitStateless(obj) {
+    this.emit("stateless", { payload: JSON.stringify(obj) });
+  }
+  _disconnect() {
+    this.config.onDisconnect?.();
+  }
+}
+
+const ENV_KEYS = [
+  "MCP_COLLAB_SESSION_IDLE_MS",
+  "MCP_COLLAB_SESSION_MAX_AGE_MS",
+  "MCP_COLLAB_SESSION_MAX_ENTRIES",
+  "MCP_COLLAB_TOKEN_TTL_MS",
+];
+let savedEnv;
+
+beforeEach(() => {
+  savedEnv = {};
+  for (const k of ENV_KEYS) savedEnv[k] = process.env[k];
+  FakeProvider.reset();
+});
+
+afterEach(() => {
+  destroyAllSessions();
+  __setCollabProviderFactory(null);
+  mock.timers.reset();
+  for (const k of ENV_KEYS) {
+    if (savedEnv[k] === undefined) delete process.env[k];
+    else process.env[k] = savedEnv[k];
+  }
+});
+
+const PAGE_A = "11111111-1111-4111-8111-111111111111";
+const PAGE_B = "22222222-2222-4222-8222-222222222222";
+const PAGE_C = "33333333-3333-4333-8333-333333333333";
+const PAGE_D = "44444444-4444-4444-8444-444444444444";
+const PAGE_E = "55555555-5555-4555-8555-555555555555";
+const PAGE_F = "66666666-6666-4666-8666-666666666666";
+
+// --- happy paths (resolve with the server's terminal reply) -----------------
+
+test("saved: resolves { saved:true, historyId, kind, alreadySaved }", async () => {
+  __setCollabProviderFactory(
+    (config) =>
+      new FakeProvider(config, {
+        reply: {
+          type: "version.saved",
+          historyId: "hist-42",
+          kind: "agent",
+          alreadySaved: false,
+        },
+      }),
+  );
+
+  const result = await savePageVersionRealtime(PAGE_A, "collab-tok", "http://host/api");
+
+  assert.deepEqual(result, {
+    saved: true,
+    historyId: "hist-42",
+    kind: "agent",
+    alreadySaved: false,
+  });
+  // The client actually asked the server to save a version (the stateless send).
+  assert.deepEqual(
+    FakeProvider.last().sent.map((p) => JSON.parse(p)),
+    [{ type: "save-version" }],
+  );
+});
+
+test("saved: surfaces alreadySaved=true (promote-not-dup / no-op save)", async () => {
+  __setCollabProviderFactory(
+    (config) =>
+      new FakeProvider(config, {
+        reply: {
+          type: "version.saved",
+          historyId: "hist-7",
+          kind: "manual",
+          alreadySaved: true,
+        },
+      }),
+  );
+
+  const result = await savePageVersionRealtime(PAGE_B, "collab-tok", "http://host/api");
+
+  assert.deepEqual(result, {
+    saved: true,
+    historyId: "hist-7",
+    kind: "manual",
+    alreadySaved: true,
+  });
+});
+
+// --- F2: terminal SKIP replies (no timeout, no false "unreachable") ---------
+
+test("F2 skip: an empty-page reply resolves to a clean { saved:false, skipped:true, reason:'empty' } — no timeout", async () => {
+  __setCollabProviderFactory(
+    (config) =>
+      new FakeProvider(config, {
+        reply: { type: "version.skipped", reason: "empty" },
+      }),
+  );
+
+  const result = await savePageVersionRealtime(PAGE_C, "collab-tok", "http://host/api");
+
+  assert.deepEqual(result, { saved: false, skipped: true, reason: "empty" });
+});
+
+test("F2 skip: a page-not-found reply throws an immediate, truthful error (not the health-timeout path)", async () => {
+  __setCollabProviderFactory(
+    (config) =>
+      new FakeProvider(config, {
+        reply: { type: "version.skipped", reason: "page-not-found" },
+      }),
+  );
+
+  await assert.rejects(
+    savePageVersionRealtime(PAGE_D, "collab-tok", "http://host/api"),
+    /was not found on the collaboration server/,
+  );
+});
+
+// --- F1 (a): predicate filters unrelated messages, resolves on the real reply ---
+
+test("F1(a) unrelated-then-real: an unrelated stateless message does NOT resolve; the later version.saved does", async () => {
+  __setCollabProviderFactory((config) => new FakeProvider(config, {})); // manual drive
+
+  const p = savePageVersionRealtime(PAGE_E, "collab-tok", "http://host/api");
+  // Let acquire's handshake + the stateless send complete so the listener is armed.
+  await new Promise((r) => setImmediate(r));
+  const provider = FakeProvider.last();
+
+  // Noise first: an unrelated stateless type (e.g. another feature's broadcast).
+  provider._emitStateless({ type: "something-else", historyId: "NOPE" });
+  // The wait must still be pending — a microtask turn would have resolved it if the
+  // predicate wrongly matched.
+  let settledEarly = false;
+  p.then(() => (settledEarly = true)).catch(() => (settledEarly = true));
+  await new Promise((r) => setImmediate(r));
+  assert.equal(settledEarly, false, "resolved on an unrelated stateless message");
+
+  // Now the real reply arrives → it resolves with that payload.
+  provider._emitStateless({
+    type: "version.saved",
+    historyId: "h-real",
+    kind: "agent",
+    alreadySaved: false,
+  });
+  const result = await p;
+  assert.deepEqual(result, {
+    saved: true,
+    historyId: "h-real",
+    kind: "agent",
+    alreadySaved: false,
+  });
+});
+
+// --- F1 (b): teardown mid-wait rejects AND removes the stateless listener -----
+
+test("F1(b) teardown mid-wait: a disconnect rejects the wait with the connection-loss error AND removes the stateless listener (no leak)", async () => {
+  __setCollabProviderFactory((config) => new FakeProvider(config, {})); // silent
+
+  const session = await acquireCollabSession(PAGE_F, "collab-tok", "http://host/api");
+  const provider = FakeProvider.last();
+
+  const p = session.sendStatelessAndAwait(
+    JSON.stringify({ type: "save-version" }),
+    (m) => (m && m.type === "version.saved" ? m : undefined),
+    20000,
+  );
+  // Swallow the eventual rejection so it does not race the assertions below.
+  p.catch(() => {});
+  await new Promise((r) => setImmediate(r));
+
+  // The wait armed exactly one stateless listener.
+  assert.equal(
+    provider.listenerCount("stateless"),
+    1,
+    "the wait must register one stateless listener",
+  );
+
+  // A disconnect tears the session down mid-wait.
+  provider._disconnect();
+
+  await assert.rejects(p, /connection closed before the update was persisted/);
+  // The listener was removed on teardown — dropping provider.off() reds this.
+  assert.equal(
+    provider.listenerCount("stateless"),
+    0,
+    "the stateless listener leaked after teardown",
+  );
+});
+
+// --- F1 (c): concurrent-in-flight guard fails fast, no cross-wiring -----------
+
+test("F1(c) concurrent guard: a second sendStatelessAndAwait while one is in flight fails fast", async () => {
+  __setCollabProviderFactory((config) => new FakeProvider(config, {})); // silent
+
+  const session = await acquireCollabSession(PAGE_A, "collab-tok", "http://host/api");
+
+  const first = session.sendStatelessAndAwait(
+    JSON.stringify({ type: "save-version" }),
+    (m) => (m && m.type === "version.saved" ? m : undefined),
+    20000,
+  );
+  first.catch(() => {}); // it stays pending until afterEach destroys the session
+
+  await assert.rejects(
+    session.sendStatelessAndAwait(
+      JSON.stringify({ type: "save-version" }),
+      (m) => (m && m.type === "version.saved" ? m : undefined),
+      20000,
+    ),
+    /already in-flight/,
+  );
+});
+
+// --- timeout: NO reply at all is the genuine "server unreachable" path --------
+
+test("timeout: rejects on a bounded timeout when the server never replies", async () => {
+  __setCollabProviderFactory((config) => new FakeProvider(config, {})); // silent
+
+  mock.timers.enable({ apis: ["setTimeout"] });
+  const p = savePageVersionRealtime(PAGE_B, "collab-tok", "http://host/api");
+  // Swallow the eventual rejection so an unhandled-rejection does not race the tick.
+  p.catch(() => {});
+
+  // Flush the (microtask-driven) connect handshake + the stateless send so the
+  // ack timer is armed before we advance the clock.
+  await new Promise((r) => setImmediate(r));
+  // Advance well past the 20s ack window; the connect timer (25s) does not fire.
+  mock.timers.tick(20000 + 100);
+
+  await assert.rejects(p, /Timeout waiting for a stateless reply/);
+});