stt leaves the platform for the transcribe plugin

Speech-to-text is now plugins/transcribe — sidecar, its own config, its own
skill and a task for the file browser's context menu. The transcription logic
moved BYTE FOR BYTE: 416 lines whose every decision has a reason attached, from
the two-pass detect-then-transcribe to the 25 language priming prompts to
timeout:false. Verified identical rather than assumed.

Removed here: api/stt/, server-settings/stt.ts and its mount, POST /chat/stt,
POST /file-browser/transcribe, the FileViewer handler behind the button hidden
last release, the Settings screen, the dead useAudioRecording hook and the
orphaned locale keys across all six locales.

blobToWav stayed. It lived in the same file as the dead hook and is still used
by DictateDialog — unrelated to STT, and deleting by file rather than by use is
how that would have gone.

No permission entry to remove: STT never had one, living under server-admin,
chat and files. The registry count is unchanged and docs:check is green.

The plugin ships a task that will not appear in the menu yet — the platform
loads a plugin's skills, affordances and notifications from its own directory
but not its tasks. That loader is the remaining piece of docs/plugin-capabilities.md
and is deliberately not built here.

1426 pass, tsgo clean, 18 plugins discovered with none broken.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: 656f5c85-e49a-4f1f-b9f3-042a04b4d043

src/servers/api/server-settings/server-settings.ts

@@ -9,7 +9,6 @@ import { readServerSettings, writeServerSettings } from 'officerdb';
 import { chatProvidersRouter } from './chat-providers';
 import { smtpRouter } from './smtp';
 import { ttsRouter } from './tts';
-import { sttRouter } from './stt';
 import { ocrRouter } from './ocr';
 
 export const serverSettingsRouter = createRouter();
@@ -17,7 +16,6 @@ export const serverSettingsRouter = createRouter();
 serverSettingsRouter.route('/chat-providers', chatProvidersRouter);
 serverSettingsRouter.route('/smtp', smtpRouter);
 serverSettingsRouter.route('/tts', ttsRouter);
-serverSettingsRouter.route('/stt', sttRouter);
 serverSettingsRouter.route('/ocr', ocrRouter);
 
 export { readServerSettings as readSettings };

src/servers/api/server-settings/stt.ts

@@ -1,48 +0,0 @@
-import { createRouter } from '../../create-router';
-import { readServerSettings, writeServerSettings } from 'officerdb';
-
-type SttConfig = {
-  url: string;
-};
-
-export async function readSttConfig(): Promise<SttConfig | undefined> {
-  const settings = await readServerSettings();
-  return settings.stt as SttConfig | undefined;
-}
-
-export const sttRouter = createRouter();
-
-sttRouter.get('/', async (ctx) => {
-  const stt = await readSttConfig();
-  if (!stt) return ctx.json(null);
-  return ctx.json(stt);
-});
-
-sttRouter.put('/', async (ctx) => {
-  const body = await ctx.req.json<SttConfig>();
-  const settings = await readServerSettings();
-  settings.stt = body;
-  await writeServerSettings(settings);
-  return ctx.json({ success: true });
-});
-
-sttRouter.post('/test', async (ctx) => {
-  const body = await ctx.req.json<{ url: string }>();
-  if (!body.url) return ctx.json({ error: 'URL required' }, 400);
-
-  try {
-    const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), 5000);
-    const res = await fetch(`${body.url.replace(/\/+$/, '')}/inference`, {
-      method: 'POST',
-      body: new FormData(),
-      signal: controller.signal,
-    });
-    clearTimeout(timeout);
-    // Whisper will return an error for empty form, but a response means it's reachable
-    return ctx.json({ success: true, status: res.status });
-  } catch (err) {
-    const message = err instanceof Error ? err.message : 'Unknown error';
-    return ctx.json({ error: message }, 500);
-  }
-});