初始化 360 全景影片播放器專案並完成 NAS 部署設定

摘要：
將本機開發的 360° 全景影片播放器納入版控，同時把執行環境從 Windows
切換到 Synology NAS，改以 Docker 部署。

根本原因：
專案原本只在有 NVIDIA 顯卡的 Windows 機器上跑，config.json 寫死了
Windows 磁碟機路徑 W:/photo/Badminton，NAS 上無法直接啟動。
另外 DSM 內建的 ffmpeg 拿掉了 VAAPI 編碼器，裸跑只能走 libx264，
Celeron J4025 雙核轉 4K 360 影片的速度無法接受。

影響：
- 在 NAS 上 npm start 會因為找不到影片資料夾而列不出任何影片
- 即使把路徑改對，轉檔仍只能用 CPU，82 分鐘的 4K 360 影片要跑十幾小時

修法：
- config.json 的 videoDir 改為 NAS 實際路徑 /volume1/photo/Badminton
- docker-compose.yml 啟用 devices: /dev/dri，讓容器取得 Intel UHD 600
  的 render node；容器內 Alpine 版 ffmpeg 保有完整 VAAPI 支援，啟動時
  會自動偵測成 vaapi 模式，並保留 libx264 當備援
- .env（不進版控）提供 VIDEO_DIR / CACHE_DIR 等 NAS 路徑給 compose 使用

驗證：
容器啟動 log 顯示「轉檔引擎：VAAPI 硬體編碼（Intel/AMD，/dev/dri）」，
/api/config 回傳 modes: ["vaapi","cpu"]，/api/videos 正確辨識來源影片為
3840x1920 equirectangular。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

public/style.css

@@ -0,0 +1,178 @@
+:root {
+  --bg: #0b0d10;
+  --bar: #14181d;
+  --fg: #e8ebef;
+  --muted: #8a939e;
+  --line: #252b33;
+  --accent: #4cc2ff;
+  --accent-2: #ffb347;
+  --danger: #ff6b6b;
+  --ok: #5ddc8a;
+  --radius: 8px;
+  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
+}
+* { box-sizing: border-box; }
+html, body { height: 100%; margin: 0; background: var(--bg); color: var(--fg); overflow: hidden; }
+button, select, input { font: inherit; color: inherit; }
+button { cursor: pointer; }
+h2, h3 { margin: 0; font-weight: 600; }
+
+#app { height: 100%; display: grid; grid-template-rows: auto 1fr; }
+
+/* ---------- top bar ---------- */
+#topbar {
+  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
+  padding: 8px 12px; background: var(--bar); border-bottom: 1px solid var(--line);
+}
+.brand { font-weight: 800; letter-spacing: .5px; font-size: 18px; color: var(--accent); }
+.brand span { color: var(--fg); font-weight: 300; margin-left: 4px; }
+.field { display: flex; align-items: center; gap: 6px; min-width: 0; }
+.field-label { color: var(--muted); font-size: 13px; white-space: nowrap; }
+select {
+  background: #1d232a; border: 1px solid var(--line); border-radius: var(--radius);
+  padding: 6px 28px 6px 10px; max-width: 46vw; text-overflow: ellipsis;
+  appearance: none; -webkit-appearance: none;
+  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
+  background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%;
+  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
+}
+select:focus { outline: 1px solid var(--accent); }
+.icon-btn {
+  background: transparent; border: 1px solid var(--line); border-radius: var(--radius);
+  width: 32px; height: 32px; color: var(--muted);
+}
+.icon-btn:hover { color: var(--fg); border-color: var(--muted); }
+.pill {
+  background: #1d232a; border: 1px solid var(--line); border-radius: 999px;
+  padding: 5px 12px; color: var(--fg); position: relative;
+}
+.pill:hover { border-color: var(--muted); }
+.pill.active { background: var(--accent); color: #06202e; border-color: var(--accent); font-weight: 600; }
+.badge {
+  display: inline-block; min-width: 18px; padding: 0 5px; margin-left: 4px;
+  background: var(--accent-2); color: #2b1a00; border-radius: 999px; font-size: 11px; font-weight: 700; line-height: 18px;
+}
+.badge[hidden] { display: none; }
+.info { margin-left: auto; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.info b { color: var(--fg); font-weight: 600; }
+.tag { display: inline-block; padding: 1px 6px; border-radius: 4px; background: #27313b; color: var(--fg); font-size: 11px; margin-left: 6px; }
+.tag.sph { background: #123a4c; color: var(--accent); }
+
+/* ---------- stage ---------- */
+#stage { position: relative; background: #000; overflow: hidden; outline: none; user-select: none; -webkit-user-select: none; }
+#gl, #video { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
+#gl { touch-action: none; cursor: grab; }
+#gl.dragging { cursor: grabbing; }
+#video { object-fit: contain; background: #000; }
+#stage.flat #gl { display: none; }
+#stage:not(.flat) #video { opacity: 0; pointer-events: none; width: 1px; height: 1px; }
+
+.hint {
+  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
+  background: rgba(0,0,0,.55); color: #ddd; font-size: 12px; padding: 6px 12px; border-radius: 999px;
+  pointer-events: none; transition: opacity .4s; backdrop-filter: blur(4px);
+}
+.spinner {
+  position: absolute; left: 50%; top: 50%; width: 44px; height: 44px; margin: -22px 0 0 -22px;
+  border: 3px solid rgba(255,255,255,.2); border-top-color: var(--accent); border-radius: 50%;
+  animation: spin .8s linear infinite; pointer-events: none;
+}
+.spinner[hidden] { display: none; }
+@keyframes spin { to { transform: rotate(360deg); } }
+.big-play {
+  position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
+  width: 84px; height: 84px; border-radius: 50%; border: 0;
+  background: rgba(20,24,29,.75); color: #fff; font-size: 34px; padding-left: 8px;
+  box-shadow: 0 6px 30px rgba(0,0,0,.5); backdrop-filter: blur(6px);
+}
+.big-play:hover { background: var(--accent); color: #06202e; }
+.big-play[hidden] { display: none; }
+
+.toast {
+  position: absolute; left: 50%; bottom: 84px; transform: translateX(-50%);
+  background: #1d232a; border: 1px solid var(--line); color: var(--fg);
+  padding: 10px 14px; border-radius: var(--radius); font-size: 14px; max-width: min(90vw, 520px);
+  display: flex; gap: 12px; align-items: center; box-shadow: 0 8px 30px rgba(0,0,0,.5); z-index: 5;
+}
+.toast[hidden] { display: none; }
+.toast.error { border-color: var(--danger); }
+.toast button { background: var(--accent); color: #06202e; border: 0; border-radius: 6px; padding: 4px 10px; font-weight: 600; white-space: nowrap; }
+
+/* ---------- player controls ---------- */
+.controls {
+  position: absolute; left: 0; right: 0; bottom: 0; padding: 24px 14px 10px;
+  background: linear-gradient(to top, rgba(0,0,0,.8), rgba(0,0,0,0));
+  transition: opacity .25s; z-index: 3;
+}
+#stage.idle .controls, #stage.idle .hint { opacity: 0; pointer-events: none; }
+#stage.idle #gl { cursor: none; }
+.row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
+.spacer { flex: 1; }
+.ctl { background: transparent; border: 0; color: #fff; font-size: 18px; width: 36px; height: 36px; border-radius: 6px; }
+.ctl:hover { background: rgba(255,255,255,.12); }
+.time { font-variant-numeric: tabular-nums; font-size: 13px; color: #ddd; }
+.ctl-select { background: rgba(255,255,255,.1); border: 0; border-radius: 6px; padding: 4px 22px 4px 8px; font-size: 13px; }
+.vol { width: 90px; accent-color: var(--accent); }
+
+#seek {
+  --played: 0%; --buffered: 0%;
+  width: 100%; height: 6px; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; margin: 0;
+}
+#seek::-webkit-slider-runnable-track {
+  height: 6px; border-radius: 3px;
+  background: linear-gradient(to right, var(--accent) var(--played), rgba(255,255,255,.45) var(--played), rgba(255,255,255,.45) var(--buffered), rgba(255,255,255,.18) var(--buffered));
+}
+#seek::-webkit-slider-thumb {
+  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%; background: #fff; margin-top: -4px;
+  box-shadow: 0 0 0 2px rgba(0,0,0,.3);
+}
+#seek::-moz-range-track {
+  height: 6px; border-radius: 3px;
+  background: linear-gradient(to right, var(--accent) var(--played), rgba(255,255,255,.45) var(--played), rgba(255,255,255,.45) var(--buffered), rgba(255,255,255,.18) var(--buffered));
+}
+#seek::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 0; }
+
+/* ---------- side panel ---------- */
+.panel {
+  position: fixed; top: 0; right: 0; bottom: 0; width: min(420px, 100vw);
+  background: var(--bar); border-left: 1px solid var(--line); z-index: 20;
+  display: flex; flex-direction: column; box-shadow: -10px 0 40px rgba(0,0,0,.5);
+}
+.panel[hidden] { display: none; }
+.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--line); }
+.panel-body { padding: 14px 16px; overflow: auto; flex: 1; }
+.panel-body h3 { font-size: 14px; margin: 10px 0 8px; word-break: break-all; }
+.panel-section-head { display: flex; align-items: center; justify-content: space-between; margin-top: 22px; }
+.muted { color: var(--muted); font-size: 12px; margin: 0 0 8px; }
+.link-btn { background: none; border: 0; color: var(--accent); font-size: 12px; padding: 0; }
+.link-btn:hover { text-decoration: underline; }
+
+.variant, .job {
+  border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; margin-bottom: 8px; background: #10141a;
+}
+.variant .top, .job .top { display: flex; align-items: center; gap: 8px; }
+.variant .name, .job .name { font-weight: 600; }
+.variant .meta, .job .meta { color: var(--muted); font-size: 12px; margin-top: 3px; word-break: break-all; }
+.variant .actions, .job .actions { margin-left: auto; display: flex; gap: 6px; }
+.btn {
+  background: #1d232a; border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; font-size: 13px;
+}
+.btn:hover { border-color: var(--muted); }
+.btn.primary { background: var(--accent); color: #06202e; border-color: var(--accent); font-weight: 600; }
+.btn.danger { color: var(--danger); }
+.btn.sm { padding: 2px 8px; font-size: 12px; }
+.status { font-size: 12px; padding: 1px 7px; border-radius: 999px; background: #27313b; white-space: nowrap; }
+.status.ready, .status.done { background: #153f2a; color: var(--ok); }
+.status.running { background: #123a4c; color: var(--accent); }
+.status.queued { background: #3d3117; color: var(--accent-2); }
+.status.error { background: #4a1d1d; color: var(--danger); }
+.bar { height: 6px; background: #232a33; border-radius: 3px; margin-top: 8px; overflow: hidden; }
+.bar > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .3s; }
+.job .err { color: var(--danger); font-size: 12px; margin-top: 4px; word-break: break-all; }
+.empty { color: var(--muted); font-size: 13px; padding: 6px 0; }
+
+@media (max-width: 760px) {
+  #topbar { gap: 8px; padding: 6px 8px; }
+  .brand, .info, .field-label, .hint, .vol, #resetBtn { display: none; }
+  select { max-width: 40vw; }
+}