refactor(ai): drop Generative AI flag, gate title generation on AI chat

Remove the separate, un-toggleable `settings.ai.generative` workspace flag
(and its write-side alias `generativeAi`) along with the dead "Ask AI"
generative editor menu, and re-gate the AI page-title generation on the
general AI chat flag (`settings.ai.chat`) — the same toggle that enables
the chat agent and the chat stream endpoint.

Why: the `generative` flag had no UI toggle (its switch was already removed,
leaving orphaned i18n strings), so the title-generation button was
unreachable on self-hosted. The "Ask AI" menu was dead — its atom was never
rendered. Consolidating onto the AI chat flag makes the title button follow
the one AI switch users actually have.

Changes:
- server: title-gen endpoint gate generative -> chat (ai-chat.controller.ts);
  remove generativeAi from update DTO and workspace service (update block,
  delete line, cloud default now { ai: { chat: true } }); fix repo comment;
  migrate generate-page-title spec assertions generative -> chat.
- client: title-gen gate -> settings.ai.chat (full-editor.tsx); remove the
  dead Ask AI button + showAiMenu wiring from bubble-menu; remove AskAiGroup
  usage/import and commented block from fixed-toolbar; delete ask-ai-group.tsx;
  remove showAiMenuAtom; drop generative/generativeAi from workspace types.
- i18n: remove 3 orphaned generative-AI keys from all 12 locales.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/client/src/features/editor/components/bubble-menu/bubble-menu.tsx

@@ -9,11 +9,10 @@ import {
   IconStrikethrough,
   IconUnderline,
   IconMessage,
-  IconSparkles,
 } from "@tabler/icons-react";
 import clsx from "clsx";
 import classes from "./bubble-menu.module.css";
-import { ActionIcon, Button, rem, Tooltip } from "@mantine/core";
+import { ActionIcon, rem, Tooltip } from "@mantine/core";
 import { ColorSelector } from "./color-selector";
 import { NodeSelector } from "./node-selector";
 import { TextAlignmentSelector } from "./text-alignment-selector";
@@ -26,8 +25,8 @@ import { v7 as uuid7 } from "uuid";
 import { isCellSelection, isTextSelected } from "@docmost/editor-ext";
 import { LinkSelector } from "@/features/editor/components/bubble-menu/link-selector.tsx";
 import { useTranslation } from "react-i18next";
-import { showAiMenuAtom, showLinkMenuAtom } from "@/features/editor/atoms/editor-atoms";
-import { userAtom, workspaceAtom } from "@/features/user/atoms/current-user-atom";
+import { showLinkMenuAtom } from "@/features/editor/atoms/editor-atoms";
+import { userAtom } from "@/features/user/atoms/current-user-atom";
 
 export interface BubbleMenuItem {
   name: string;
@@ -44,16 +43,12 @@ type EditorBubbleMenuProps = Omit<BubbleMenuProps, "children" | "editor"> & {
 export const EditorBubbleMenu: FC<EditorBubbleMenuProps> = (props) => {
   const { templateMode = false } = props;
   const { t } = useTranslation();
-  const [showAiMenu, setShowAiMenu] = useAtom(showAiMenuAtom);
   const [showCommentPopup, setShowCommentPopup] = useAtom(showCommentPopupAtom);
-  const workspace = useAtomValue(workspaceAtom);
-  const isGenerativeAiEnabled = workspace?.settings?.ai?.generative === true;
   const user = useAtomValue(userAtom);
   const editorToolbarEnabled =
     user?.settings?.preferences?.editorToolbar ?? false;
   const [, setDraftCommentId] = useAtom(draftCommentIdAtom);
   const showCommentPopupRef = useRef(showCommentPopup);
-  const showAiMenuRef = useRef(showAiMenu);
   const [showLinkMenu] = useAtom(showLinkMenuAtom);
   const showLinkMenuRef = useRef(showLinkMenu);
 
@@ -61,10 +56,6 @@ export const EditorBubbleMenu: FC<EditorBubbleMenuProps> = (props) => {
     showCommentPopupRef.current = showCommentPopup;
   }, [showCommentPopup]);
 
-  useEffect(() => {
-    showAiMenuRef.current = showAiMenu;
-  }, [showAiMenu]);
-
   useEffect(() => {
     showLinkMenuRef.current = showLinkMenu;
   }, [showLinkMenu]);
@@ -145,7 +136,6 @@ export const EditorBubbleMenu: FC<EditorBubbleMenuProps> = (props) => {
         empty ||
         isNodeSelection(selection) ||
         isCellSelection(selection) ||
-        showAiMenuRef.current ||
         showLinkMenuRef.current ||
         showCommentPopupRef?.current
       ) {
@@ -168,8 +158,8 @@ export const EditorBubbleMenu: FC<EditorBubbleMenuProps> = (props) => {
   const [isTextAlignmentSelectorOpen, setIsTextAlignmentOpen] = useState(false);
   const [isColorSelectorOpen, setIsColorSelectorOpen] = useState(false);
 
-  // Hide the bubble menu immediately when AI menu is shown
-  if (showAiMenu || showLinkMenu) return;
+  // Hide the bubble menu immediately when the link menu is shown
+  if (showLinkMenu) return;
 
   return (
     <BubbleMenu
@@ -177,22 +167,6 @@ export const EditorBubbleMenu: FC<EditorBubbleMenuProps> = (props) => {
       style={{ zIndex: 199, position: "relative" }}
     >
       <div className={classes.bubbleMenu}>
-        {isGenerativeAiEnabled && (
-          <>
-            <Button
-              variant="default"
-              className={clsx(classes.buttonRoot)}
-              radius="0"
-              leftSection={<IconSparkles size={16} />}
-              onClick={() => {
-                setShowAiMenu(true);
-              }}
-            >
-              {t("Ask AI")}
-            </Button>
-            <div className={classes.divider} />
-          </>
-        )}
         {!editorToolbarEnabled && (
           <>
             <NodeSelector

apps/client/src/features/editor/components/fixed-toolbar/fixed-toolbar.tsx

@@ -12,8 +12,6 @@ import { MediaGroup } from "./groups/media-group";
 import { QuickInsertsGroup } from "./groups/quick-inserts-group";
 import { MoreInsertsGroup } from "./groups/more-inserts-group";
 import { HistoryGroup } from "./groups/history-group";
-import { AskAiGroup } from "./groups/ask-ai-group";
-import { workspaceAtom } from "@/features/user/atoms/current-user-atom";
 import classes from "./fixed-toolbar.module.css";
 
 type FixedToolbarProps = {
@@ -28,8 +26,6 @@ export const FixedToolbar: FC<FixedToolbarProps> = ({
   const editorFromAtom = useAtomValue(pageEditorAtom);
   const editor = editorProp ?? editorFromAtom;
   const state = useToolbarState(editor);
-  const workspace = useAtomValue(workspaceAtom);
-  const isGenerativeAiEnabled = workspace?.settings?.ai?.generative === true;
 
   if (!editor || !state) return null;
 
@@ -43,12 +39,6 @@ export const FixedToolbar: FC<FixedToolbarProps> = ({
         onMouseDown={(e) => e.preventDefault()}
       >
         <div className={classes.inner}>
-          {/* {isGenerativeAiEnabled && (
-            <>
-              <AskAiGroup />
-              <div className={classes.divider} />
-            </>
-          )} */}
           <BlockTypeGroup editor={editor} />
           <div className={classes.divider} />
           <InlineMarksGroup editor={editor} state={state} />

apps/client/src/features/editor/components/fixed-toolbar/groups/ask-ai-group.tsx

@@ -1,23 +0,0 @@
-import { FC } from "react";
-import { Button } from "@mantine/core";
-import { IconSparkles } from "@tabler/icons-react";
-import { useSetAtom } from "jotai";
-import { useTranslation } from "react-i18next";
-import { showAiMenuAtom } from "@/features/editor/atoms/editor-atoms";
-
-export const AskAiGroup: FC = () => {
-  const { t } = useTranslation();
-  const setShowAiMenu = useSetAtom(showAiMenuAtom);
-
-  return (
-    <Button
-      variant="subtle"
-      color="dark"
-      size="xs"
-      leftSection={<IconSparkles size={14} />}
-      onClick={() => setShowAiMenu(true)}
-    >
-      {t("Ask AI")}
-    </Button>
-  );
-};

apps/client/src/features/editor/components/fixed-toolbar/groups/generate-title-group.tsx

@@ -13,7 +13,7 @@ interface Props {
 /**
  * AI "generate title" button (#199). Reads the live editor content and applies a
  * model-suggested title immediately. Rendered in the page byline, only in edit
- * mode and when the workspace's generative AI flag is on.
+ * mode and when the workspace's AI chat flag is on.
  */
 export const GenerateTitleGroup: FC<Props> = ({
   pageId,