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/[id]/+server.ts

@@ -0,0 +1,18 @@
+import { json, error } from '@sveltejs/kit';
+import { getJob, setJobStatus } from '$lib/server/db.js';
+
+export async function GET({ params }) {
+	const job = getJob(params.id);
+	if (!job) throw error(404, 'Job not found');
+	return json(job);
+}
+
+export async function DELETE({ params }) {
+	const job = getJob(params.id);
+	if (!job) throw error(404, 'Job not found');
+	if (job.status === 'done' || job.status === 'failed') {
+		throw error(409, 'Job already completed');
+	}
+	setJobStatus(params.id, 'cancelled', 0);
+	return new Response(null, { status: 204 });
+}