[ci skip] f1-stream: add CDN token refresh, SvelteKit frontend, multi-stream layout (Phases 6-8)

- Phase 6: CDN token lifecycle with 3-strategy URL matching and periodic refresh
- Phase 7: SvelteKit 2/Svelte 5 frontend with schedule calendar and hls.js player
- Phase 8: Multi-stream layout supporting up to 4 simultaneous HLS streams
- Update Dockerfile to multi-stage build (Node.js frontend + Python backend)
- Switch deployment to :latest tag with Always pull policy for CI-driven deploys
- Update Woodpecker CI to use explicit latest tag

stacks/f1-stream/files/frontend/src/app.css

@@ -0,0 +1,35 @@
+@import "tailwindcss";
+
+@theme {
+	--color-f1-red: #e10600;
+	--color-f1-red-dark: #b50500;
+	--color-f1-bg: #111111;
+	--color-f1-surface: #1a1a1a;
+	--color-f1-surface-hover: #242424;
+	--color-f1-border: #2a2a2a;
+	--color-f1-text: #e0e0e0;
+	--color-f1-text-muted: #888888;
+}
+
+body {
+	background-color: var(--color-f1-bg);
+	color: var(--color-f1-text);
+	font-family: system-ui, -apple-system, sans-serif;
+}
+
+/* Scrollbar styling */
+::-webkit-scrollbar {
+	width: 6px;
+}
+::-webkit-scrollbar-track {
+	background: var(--color-f1-bg);
+}
+::-webkit-scrollbar-thumb {
+	background: var(--color-f1-border);
+	border-radius: 3px;
+}
+
+/* HLS video player */
+video::-webkit-media-controls {
+	display: none !important;
+}