add job scheduler: sleep between jobs, schedule window, FFmpeg progress parsing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/api/execute.ts

@@ -6,6 +6,7 @@ import type { Job, Node, MediaItem, MediaStream } from '../types';
 import { predictExtractedFiles } from '../services/ffmpeg';
 import { accessSync, constants } from 'node:fs';
 import { log, error as logError } from '../lib/log';
+import { getSchedulerState, updateSchedulerState } from '../services/scheduler';
 
 const app = new Hono();
 
@@ -305,4 +306,28 @@ async function runJob(job: Job): Promise<void> {
 	}
 }
 
+// ─── Scheduler ────────────────────────────────────────────────────────────────
+
+// GET /scheduler — current scheduler state
+app.get('/scheduler', (c) => {
+	return c.json(getSchedulerState());
+});
+
+// PATCH /scheduler — update scheduler settings
+app.patch('/scheduler', async (c) => {
+	const body = await c.req.json();
+	updateSchedulerState(body);
+	return c.json(getSchedulerState());
+});
+
+// ─── FFmpeg progress parsing ───────────────────────────────────────────────────
+
+/** Parse FFmpeg stderr line for progress. Returns seconds processed or null. */
+export function parseFFmpegProgress(line: string): number | null {
+	const match = line.match(/time=(\d+):(\d+):(\d+)\.(\d+)/);
+	if (!match) return null;
+	const [, h, m, s] = match.map(Number);
+	return h * 3600 + m * 60 + s;
+}
+
 export default app;