replace hardcoded download job with download-media script capability

move video/audio downloads off the dedicated ReClip download lane onto the
generic script-job path:

- delete execute-download.ts, reclip-client.ts and the POST /jobs/download
  endpoint; drop the 'download' mode from the pipeline_jobs enum (legacy rows
  tolerated)
- execute-script.ts: strip the @@officer:progress@@ sentinel from the log,
  emit progress events, and isolate viewer/log writes (safeEmit/safeLog) so a
  broadcast or log throw can't wedge the stdout pump
- pipeline-job-manager.ts: persist latest progress; guard sendToViewer sends
- ScriptJobDetail: render the two progress bars; DownloadJobDetail kept for
  legacy history rows
- TaskRunnerModal: ScriptRunner descends into the triggered directory
- VideoDownloadPanel: rewire startJob to the script-job path

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

src/servers/api/tasks/pipeline-jobs-routes.ts

@@ -5,7 +5,6 @@ import { getPipelineJobsForUser, getPipelineJob } from 'officerdb';
 import { getTaskByDirName } from './task-files';
 import * as jobManager from './pipeline-job-manager';
 import { jobLogPath } from './execute-script';
-import { getRootDir, resolveUserPath } from '../file-browser/router';
 
 export const pipelineJobsRouter = createRouter();
 
@@ -71,44 +70,6 @@ pipelineJobsRouter.post('/', async (c) => {
   return c.json({ jobId, status });
 });
 
-// POST /download — enqueue a video/audio download job (ReClip). Runs in its own lane, needs no capability
-// task. Body: { urls[] (the exact list to download — preferred), OR url (expanded server-side),
-// format:'audio'|'video', dir (target folder, home-relative), root?, label? }. Passing `urls` locks the
-// job to the list the panel already expanded, so a Mix/radio playlist can't drift between fetch + job.
-pipelineJobsRouter.post('/download', async (c) => {
-  const user = c.get('user');
-  const body = await c.req.json<{
-    url?: string;
-    urls?: string[];
-    format?: 'audio' | 'video';
-    dir?: string;
-    root?: string;
-    label?: string;
-  }>();
-  if (!body.url && !body.urls?.length) throw errors.BAD_REQUEST('url or urls is required');
-  const rootDir = getRootDir(user, body.root);
-  const absDir = resolveUserPath(rootDir, body.dir ?? '/'); // traversal-guarded
-  const format = body.format === 'video' ? 'video' : 'audio';
-  const inputs: Record<string, string> = body.urls?.length
-    ? { urls: JSON.stringify(body.urls), format, absDir }
-    : { url: body.url!, format, absDir };
-  const { jobId, status } = await jobManager.enqueueJob(
-    {
-      userId: user.id,
-      email: user.email,
-      username: user.username ?? '',
-      mode: 'download',
-      taskDirName: 'video-download',
-      taskName: body.label || (format === 'audio' ? 'Audio download' : 'Video download'),
-      inputs,
-      cwd: body.dir ?? '/',
-      config: {},
-    },
-    'queue',
-  );
-  return c.json({ jobId, status });
-});
-
 // GET /counts — header-badge summary { running, runningJobId, queued }. Before /:id so it isn't
 // captured as an id.
 pipelineJobsRouter.get('/counts', async (c) => {