Initial commit: Tonemark PWA

Tonemark is a SvelteKit PWA for transcribing YouTube videos, audio
and video files, and microphone recordings using a local Whisper backend.

Features:
- Dark glassmorphic UI with electric-lime accent (5 switchable themes)
- Rail nav (desktop) / tab bar (mobile) layout
- Drop zone, YouTube URL input, and live audio recording inputs
- Audio mode waveform cards (none / standard / aggressive / auto)
- Real-time transcription progress with animated waveform
- Job queue with SSE streaming updates
- Push notifications on job completion
- PWA with native SvelteKit service worker
- SRT / TXT / MD / JSON transcript downloads

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/routes/api/jobs/+server.ts

@@ -0,0 +1,45 @@
+import { json, error } from '@sveltejs/kit';
+import { createJob, listJobs } from '$lib/server/db.js';
+import { startYouTubeJob, startUploadJob } from '$lib/server/pipeline.js';
+import type { AudioMode } from '$lib/types.js';
+
+export async function GET() {
+	return json(listJobs());
+}
+
+export async function POST({ request }) {
+	const contentType = request.headers.get('content-type') ?? '';
+
+	let url: string | null = null;
+	let audioMode: AudioMode = 'auto';
+	let language: string | undefined;
+	let fileBuffer: Buffer | null = null;
+	let filename = 'upload';
+
+	if (contentType.includes('application/json')) {
+		const body = await request.json();
+		url = body.url ?? null;
+		audioMode = body.audioMode ?? 'auto';
+		language = body.language;
+	} else if (contentType.includes('multipart/form-data')) {
+		const form = await request.formData();
+		url = form.get('url')?.toString() ?? null;
+		audioMode = (form.get('audioMode')?.toString() as AudioMode) ?? 'auto';
+		language = form.get('language')?.toString();
+		const file = form.get('file');
+		if (file instanceof File) {
+			fileBuffer = Buffer.from(await file.arrayBuffer());
+			filename = file.name;
+		}
+	} else {
+		throw error(415, 'Unsupported content type');
+	}
+
+	if (!url && !fileBuffer) throw error(400, 'Provide url or file');
+
+	const jobId = url
+		? await startYouTubeJob(url, audioMode, language)
+		: await startUploadJob(fileBuffer!, filename, audioMode, language);
+
+	return json({ id: jobId }, { status: 201 });
+}