feat(dictation): gate streaming dictation behind a workspace toggle

Streaming (silence-cut) dictation was hardcoded on. Put it behind a per-workspace
flag settings.ai.dictationStreaming, default off, with batch dictation as the
default and fallback. Mirrors the existing settings.ai.dictation flag end to end:

- server: aiDictationStreaming on UpdateWorkspaceDto + workspace.service writes
  settings.ai.dictationStreaming via updateAiSettings (jsonb merge keeps siblings)
- client: IWorkspaceAiSettings.dictationStreaming, an optimistic "Streaming
  dictation" sub-toggle under "Voice dictation" (disabled when dictation is off)
- gate the MicButton streaming prop in the editor toolbar and chat composer on
  the flag instead of a literal true

When the flag is absent/false both call sites pass streaming=false, so the VAD
model/wasm are never fetched and behavior is unchanged. Reuses the existing STT
model and /ai-chat/transcribe — no new provider/model/endpoint fields.

Removes the backlog entry now that it is implemented.

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

apps/client/src/features/ai-chat/components/chat-input.tsx

@@ -35,6 +35,10 @@ export default function ChatInput({
   const [value, setValue] = useAtom(aiChatDraftAtom);
   const workspace = useAtomValue(workspaceAtom);
   const isDictationEnabled = workspace?.settings?.ai?.dictation === true;
+  // Streaming (silence-cut) dictation is opt-in per workspace; absent/false
+  // keeps the stable batch path.
+  const streamingDictation =
+    workspace?.settings?.ai?.dictationStreaming === true;
 
   const submit = (): void => {
     const text = value.trim();
@@ -71,7 +75,7 @@ export default function ChatInput({
       {isDictationEnabled && (
         <MicButton
           size="lg"
-          streaming
+          streaming={streamingDictation}
           disabled={isStreaming || disabled}
           onText={(text) => setValue((v) => (v ? `${v} ${text}` : text))}
         />

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

@@ -1,5 +1,7 @@
 import { FC, useRef } from "react";
 import type { Editor } from "@tiptap/react";
+import { useAtomValue } from "jotai";
+import { workspaceAtom } from "@/features/user/atoms/current-user-atom.ts";
 import { MicButton } from "@/features/dictation/components/mic-button";
 
 interface Props {
@@ -9,6 +11,11 @@ interface Props {
 }
 
 export const DictationGroup: FC<Props> = ({ editor, color, iconSize }) => {
+  // Streaming (silence-cut) dictation is opt-in per workspace; absent/false
+  // keeps the stable batch path.
+  const workspace = useAtomValue(workspaceAtom);
+  const streamingDictation =
+    workspace?.settings?.ai?.dictationStreaming === true;
   // Caret snapshot taken when dictation starts (where the first segment lands).
   const rangeRef = useRef<{ from: number; to: number } | null>(null);
   // Running insertion point: after each inserted segment we remember the caret
@@ -70,7 +77,7 @@ export const DictationGroup: FC<Props> = ({ editor, color, iconSize }) => {
   return (
     <MicButton
       size="md"
-      streaming
+      streaming={streamingDictation}
       onStart={handleStart}
       onText={handleText}
       disabled={!editor.isEditable}

apps/client/src/features/workspace/components/settings/components/ai-provider-settings.tsx

@@ -267,6 +267,8 @@ export default function AiProviderSettings() {
   const [dictationEnabled, setDictationEnabled] = useState<boolean>(
     workspace?.settings?.ai?.dictation ?? false,
   );
+  const [streamingDictationEnabled, setStreamingDictationEnabled] =
+    useState<boolean>(workspace?.settings?.ai?.dictationStreaming ?? false);
   const [publicShareAssistantEnabled, setPublicShareAssistantEnabled] =
     useState<boolean>(
       workspace?.settings?.ai?.publicShareAssistant ?? false,
@@ -274,6 +276,8 @@ export default function AiProviderSettings() {
   const [chatToggleLoading, setChatToggleLoading] = useState(false);
   const [searchToggleLoading, setSearchToggleLoading] = useState(false);
   const [dictationToggleLoading, setDictationToggleLoading] = useState(false);
+  const [streamingDictationToggleLoading, setStreamingDictationToggleLoading] =
+    useState(false);
   const [
     publicShareAssistantToggleLoading,
     setPublicShareAssistantToggleLoading,
@@ -512,6 +516,35 @@ export default function AiProviderSettings() {
     }
   }
 
+  // Optimistic toggle for the streaming (silence-cut) dictation sub-mode
+  // (settings.ai.dictationStreaming). Only meaningful when dictation is on.
+  async function handleToggleStreamingDictation(value: boolean) {
+    setStreamingDictationToggleLoading(true);
+    const previous = streamingDictationEnabled;
+    setStreamingDictationEnabled(value);
+    try {
+      const updated = await updateWorkspace({ aiDictationStreaming: value });
+      setWorkspace({
+        ...updated,
+        settings: {
+          ...updated.settings,
+          ai: { ...updated.settings?.ai, dictationStreaming: value },
+        },
+      });
+      notifications.show({ message: t("Updated successfully") });
+    } catch (err) {
+      setStreamingDictationEnabled(previous);
+      const message = (err as { response?: { data?: { message?: string } } })
+        ?.response?.data?.message;
+      notifications.show({
+        message: message ?? t("Failed to update data"),
+        color: "red",
+      });
+    } finally {
+      setStreamingDictationToggleLoading(false);
+    }
+  }
+
   // Optimistic toggle for the anonymous public-share AI assistant
   // (settings.ai.publicShareAssistant). When off, the public endpoint 404s.
   async function handleTogglePublicShareAssistant(value: boolean) {
@@ -952,6 +985,33 @@ export default function AiProviderSettings() {
           )}
         </Text>
 
+        {/* Streaming dictation is a sub-mode of voice dictation: it cuts on
+            pauses and transcribes each segment as you speak. Disabled unless
+            dictation itself is on. */}
+        <Group justify="space-between" align="center" wrap="nowrap">
+          <Stack gap={0}>
+            <Text fw={600} size="sm">
+              {t("Streaming dictation")}
+            </Text>
+            <Text size="xs" c="dimmed">
+              {t("Transcribe as you speak, cutting on pauses")}
+            </Text>
+          </Stack>
+          <Switch
+            label={t("Streaming dictation")}
+            labelPosition="left"
+            checked={streamingDictationEnabled}
+            disabled={
+              !dictationEnabled ||
+              dictationToggleLoading ||
+              streamingDictationToggleLoading
+            }
+            onChange={(e) =>
+              handleToggleStreamingDictation(e.currentTarget.checked)
+            }
+          />
+        </Group>
+
         <Group grow align="flex-start">
           <TextInput
             label={t("Model")}

apps/client/src/features/workspace/types/workspace.types.ts

@@ -25,6 +25,7 @@ export interface IWorkspace {
   mcpEnabled?: boolean;
   aiChat?: boolean;
   aiDictation?: boolean;
+  aiDictationStreaming?: boolean;
   aiPublicShareAssistant?: boolean;
   trashRetentionDays?: number;
   restrictApiToAdmins?: boolean;
@@ -62,6 +63,7 @@ export interface IWorkspaceAiSettings {
   mcp?: boolean;
   chat?: boolean;
   dictation?: boolean;
+  dictationStreaming?: boolean;
   publicShareAssistant?: boolean;
 }