Implement Tuner v1 — Go backend, React frontend, Docker setup

- Go backend: REST API, M3U parser, FFmpeg/MediaMTX process manager
- React/Vite frontend: HLS player, admin panel, channel browser (dark theme)
- MediaMTX config for RTMP ingest + HLS output
- Multi-stage Dockerfile (Go + Bun + Alpine runtime)
- docker-compose.yml for single-container deployment
- Sample M3U playlist with test streams

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

frontend/src/components/Player.tsx

@@ -0,0 +1,55 @@
+import { useEffect, useRef } from "react";
+import Hls from "hls.js";
+
+export default function Player() {
+  const videoRef = useRef<HTMLVideoElement>(null);
+  const hlsRef = useRef<Hls | null>(null);
+
+  useEffect(() => {
+    const video = videoRef.current;
+    if (!video) return;
+
+    const src = `http://${window.location.hostname}:8888/live/stream/`;
+
+    if (Hls.isSupported()) {
+      const hls = new Hls({
+        enableWorker: true,
+        lowLatencyMode: true,
+      });
+      hlsRef.current = hls;
+      hls.loadSource(src);
+      hls.attachMedia(video);
+      hls.on(Hls.Events.MANIFEST_PARSED, () => {
+        video.play().catch(() => {});
+      });
+      hls.on(Hls.Events.ERROR, (_event, data) => {
+        if (data.fatal) {
+          if (data.type === Hls.ErrorTypes.NETWORK_ERROR) {
+            setTimeout(() => hls.loadSource(src), 5000);
+          } else {
+            hls.destroy();
+          }
+        }
+      });
+    } else if (video.canPlayType("application/vnd.apple.mpegurl")) {
+      video.src = src;
+      video.addEventListener("loadedmetadata", () => {
+        video.play().catch(() => {});
+      });
+    }
+
+    return () => {
+      if (hlsRef.current) {
+        hlsRef.current.destroy();
+        hlsRef.current = null;
+      }
+    };
+  }, []);
+
+  return (
+    <div className="player-container">
+      <video ref={videoRef} className="player-video" controls playsInline />
+      <div className="player-offline">Stream Offline</div>
+    </div>
+  );
+}