diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 70c007e..bc57f33 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -3,6 +3,9 @@ mod models;
 mod server;
 mod storage;
 
+use std::io::{Read, Write};
+use std::time::Duration;
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     // 在后台线程启动 HTTP 服务器
@@ -13,6 +16,25 @@ pub fn run() {
         });
     });
 
+    // 等待 HTTP 服务器就绪后再打开窗口
+    for i in 0..50 {
+        if let Ok(mut s) = std::net::TcpStream::connect_timeout(
+            &"127.0.0.1:8000".parse().unwrap(),
+            Duration::from_millis(500),
+        ) {
+            // 发送一个简单的 HTTP 请求测试
+            let _ = s.write_all(b"GET /api/state HTTP/1.0\r\n\r\n");
+            let mut buf = [0u8; 4];
+            if s.read(&mut buf).is_ok() {
+                break;
+            }
+        }
+        if i == 0 {
+            eprintln!("[dpm] 等待 HTTP 服务器启动...");
+        }
+        std::thread::sleep(Duration::from_millis(100));
+    }
+
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
         .run(tauri::generate_context!())
diff --git a/src-tauri/src/server.rs b/src-tauri/src/server.rs
index d6500e0..f6e8622 100644
--- a/src-tauri/src/server.rs
+++ b/src-tauri/src/server.rs
@@ -18,7 +18,7 @@ use std::fs;
 use tokio_stream::wrappers::BroadcastStream;
 use tokio_stream::StreamExt;
 use tower_http::cors::CorsLayer;
-use tower_http::services::{ServeDir, ServeFile};
+use tower_http::services::ServeDir;
 
 // ===================== 媒体目录 =====================
 fn media_dir() -> PathBuf {
@@ -46,8 +46,50 @@ impl AppState {
     }
 }
 
+/// 智能查找 dist 目录（前端静态文件）
+/// 支持多种运行场景：
+///   - tauri dev 时 CWD = src-tauri/ → ../dist
+///   - 二进制在 target/release/dpm → ../../dist
+///   - 从项目根目录运行时 → dist
+fn dist_dir() -> PathBuf {
+    let candidates: Vec<PathBuf> = {
+        let mut c = Vec::new();
+        // 1. 相对于当前工作目录
+        c.push(PathBuf::from("dist"));
+        c.push(PathBuf::from("../dist"));
+        // 2. 相对于可执行文件路径
+        if let Ok(exe) = std::env::current_exe() {
+            if let Some(dir) = exe.parent() {
+                // 二进制在 src-tauri/target/release/dpm → dist 在 dpm/dist/
+                c.push(dir.join("../../../dist"));
+                // macOS .app bundle: dpm.app/Contents/MacOS/dpm
+                c.push(dir.join("../Resources/dist"));
+            }
+        }
+        c
+    };
+
+    for p in &candidates {
+        let canonical = p.canonicalize();
+        if let Ok(path) = canonical {
+            if path.join("index.html").exists() {
+                return path;
+            }
+        }
+    }
+
+    // Fallback：直接尝试最常见的路径
+    let fallback = PathBuf::from("../dist");
+    eprintln!("[dpm] 警告: 找不到 dist 目录 (已尝试 {:?})，使用: {:?}", candidates, fallback);
+    fallback
+}
+
 // ===================== 路由构建 =====================
 pub fn create_router(state: AppState) -> Router {
+    let dist = dist_dir();
+    println!("[dpm] 静态文件目录: {:?}", dist);
+    let dist_str = dist.to_string_lossy().to_string();
+
     Router::new()
         .route("/api/login", post(login_handler))
         .route("/api/settings", get(get_settings).post(update_settings))
@@ -61,11 +103,15 @@ pub fn create_router(state: AppState) -> Router {
         .route("/api/control", post(control_handler))
         .route("/api/state", get(get_state).post(update_state))
         .route("/api/events", get(sse_handler))
+        // 媒体文件：用户目录 ~/Downloads/Media/
         .nest_service("/file", ServeDir::new(media_dir_str()))
+        // SPA 静待文件回退
         .fallback_service(
-            ServeDir::new("../dist")
+            ServeDir::new(&dist_str)
                 .append_index_html_on_directories(true)
-                .fallback(ServeFile::new("../dist/index.html")),
+                .fallback(tower_http::services::ServeFile::new(
+                    format!("{}/index.html", dist_str),
+                )),
         )
         .layer(CorsLayer::permissive())
         .with_state(state)
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index f5e05d8..e9e43ab 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -4,7 +4,7 @@
   "version": "0.1.0",
   "identifier": "com.pine.dpm",
   "build": {
-    "beforeDevCommand": "yarn dev",
+    "beforeDevCommand": "TAURI_DEV_HOST=0.0.0.0 yarn dev",
     "devUrl": "http://localhost:1420",
     "beforeBuildCommand": "yarn build",
     "frontendDist": "../dist"
diff --git a/src/pages/Screen.jsx b/src/pages/Screen.jsx
index 01c82ba..236972e 100644
--- a/src/pages/Screen.jsx
+++ b/src/pages/Screen.jsx
@@ -36,137 +36,138 @@ export default function Screen() {
   const [soundBlocked, setSoundBlocked] = useState(false);
   const [loaded, setLoaded] = useState(false);
   const [loaderText, setLoaderText] = useState('加载播放列表中...');
+  const [mediaKey, setMediaKey] = useState(0); // 强制重新渲染，用于单项目循环
   const [showVideo, setShowVideo] = useState(true);
-  const [currentSrc, setCurrentSrc] = useState('');
 
   const videoRef = useRef(null);
   const imgRef = useRef(null);
   const timerRef = useRef(null);
 
+  // ref 存储可变值，避免回调中的闭包过期
+  const listRef = useRef(list);
+  const indexRef = useRef(index);
+  const pausedRef = useRef(paused);
+  const playModeRef = useRef(playMode);
+  const imageDurationRef = useRef(imageDuration);
+  const soundBlockedRef = useRef(soundBlocked);
+
+  useEffect(() => { listRef.current = list; }, [list]);
+  useEffect(() => { indexRef.current = index; }, [index]);
+  useEffect(() => { pausedRef.current = paused; }, [paused]);
+  useEffect(() => { playModeRef.current = playMode; }, [playMode]);
+  useEffect(() => { imageDurationRef.current = imageDuration; }, [imageDuration]);
+  useEffect(() => { soundBlockedRef.current = soundBlocked; }, [soundBlocked]);
+
   const getUrl = useCallback((item) => {
     return item.source === 'url' ? item.relative_path : `/file/${item.relative_path}`;
   }, []);
 
-  const reportState = useCallback((status) => {
-    const item = list[index] || null;
-    api.updateState({
-      status,
-      index,
-      name: item ? item.name : '',
-      type: item ? item.type : '',
-    }).catch(() => {});
-  }, [list, index]);
+  // ============ 核心播放控制 ============
 
-  const updateStatusUI = useCallback(() => { }, []); // CSS handles visual feedback
-
-  const play = useCallback(() => {
+  /** 稳定的 next — 始终推进索引（不检查 paused），永不停止 */
+  const next = useCallback(() => {
     if (timerRef.current) clearTimeout(timerRef.current);
-    if (paused) return;
-    const item = list[index];
-    if (!item) return;
-    const url = getUrl(item);
-
-    if (item.type === 'video') {
-      setShowVideo(true);
-      setCurrentSrc(url);
-      const video = videoRef.current;
-      if (video) {
-        video.style.display = 'block';
-        video.src = url;
-        video.load();
-        video.muted = soundBlocked;
-        const p = video.play();
-        if (p !== undefined) {
-          p.then(() => {
-            reportState('playing');
-          }).catch(() => {
-            setSoundBlocked(true);
-            video.muted = true;
-            video.play().catch(() => {});
-            reportState('playing');
-          });
-        }
+    const len = listRef.current.length;
+    if (len === 0) return;
+    const mode = playModeRef.current;
+    setIndex(prev => {
+      if (mode === 'random') {
+        return Math.floor(Math.random() * len);
       }
-    } else {
-      // Image
-      setShowVideo(false);
-      setCurrentSrc(url);
-      reportState('playing');
-      timerRef.current = setTimeout(next, imageDuration * 1000);
-    }
-  }, [list, index, paused, getUrl, soundBlocked, imageDuration, reportState]);
+      // 关键：始终循环，(prev + 1) % len 保证永不越界
+      return (prev + 1) % len;
+    });
+    // 单项目时 index 不变（(0+1)%1=0），用 mediaKey 强制渲染
+    setMediaKey(k => k + 1);
+  }, []);
 
   const skip = useCallback((delta) => {
     if (timerRef.current) clearTimeout(timerRef.current);
+    const len = listRef.current.length;
+    if (len === 0) return;
+    const mode = playModeRef.current;
     setIndex(prev => {
-      if (playMode === 'random') {
-        return Math.floor(Math.random() * list.length);
+      if (mode === 'random') {
+        return Math.floor(Math.random() * len);
       }
-      return (prev + delta + list.length) % list.length;
+      return (prev + delta + len) % len;
     });
-  }, [playMode, list.length]);
+    setMediaKey(k => k + 1);
+  }, []);
 
-  const next = useCallback(() => {
-    if (paused) return;
-    if (timerRef.current) clearTimeout(timerRef.current);
-    setIndex(prev => {
-      if (playMode === 'random') {
-        return Math.floor(Math.random() * list.length);
-      }
-      return (prev + 1) % list.length;
-    });
-  }, [paused, playMode, list.length]);
+  // ============ 播放效果 ============
 
-  // Play when index changes
+  // index / mediaKey 变化时播放对应项
   useEffect(() => {
-    if (loaded && list.length > 0) {
-      const item = list[index];
-      if (item) {
-        if (item.type === 'video') {
-          setShowVideo(true);
-          setCurrentSrc(getUrl(item));
-        } else {
-          const url = getUrl(item);
-          setShowVideo(false);
-          setCurrentSrc(url);
-        }
-      }
-    }
-  }, [index, loaded]);
-
-  // Separate effect for playback triggered by src changes
-  useEffect(() => {
-    if (!loaded || list.length === 0 || !currentSrc) return;
+    if (!loaded || list.length === 0 || paused) return;
     const item = list[index];
     if (!item) return;
 
+    // 同步状态到后端
+    api.updateState({
+      status: 'playing',
+      index,
+      name: item.name || '',
+      media_type: item.type || '',
+    }).catch(() => {});
+
     if (item.type === 'video') {
+      setShowVideo(true);
       const video = videoRef.current;
-      if (video) {
-        video.style.display = 'block';
-        video.src = currentSrc;
-        video.load();
-        video.muted = soundBlocked;
-        const p = video.play();
-        if (p !== undefined) {
-          p.then(() => reportState('playing'))
-            .catch(() => {
-              setSoundBlocked(true);
-              video.muted = true;
-              video.play().catch(() => {});
-              reportState('playing');
-            });
-        }
+      if (!video) return;
+      const url = getUrl(item);
+      video.src = url;
+      video.load();
+      video.muted = soundBlocked;
+      video.volume = volume;
+      const p = video.play();
+      if (p !== undefined) {
+        p.catch(() => {
+          setSoundBlocked(true);
+          video.muted = true;
+          video.play().catch(() => {});
+        });
       }
     } else {
+      // 图片
+      setShowVideo(false);
+      const url = getUrl(item);
+      imgRef.current.src = url;
       if (timerRef.current) clearTimeout(timerRef.current);
-      reportState('playing');
       timerRef.current = setTimeout(next, imageDuration * 1000);
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [index]);
+  }, [index, mediaKey, loaded, paused]);
 
-  // Load playlist on mount
+  // 恢复播放：paused 从 true → false 时触发
+  useEffect(() => {
+    if (paused || !loaded || list.length === 0) return;
+    const item = list[index];
+    if (!item || item.type !== 'video') return;
+    const video = videoRef.current;
+    if (video && video.paused && video.src) {
+      video.play().catch(() => {
+        setSoundBlocked(true);
+        video.muted = true;
+        video.play().catch(() => {});
+      });
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [paused]);
+
+  // ============ 事件监听 ============
+
+  // Video ended → next（稳定，永不失效）
+  useEffect(() => {
+    const video = videoRef.current;
+    if (!video) return;
+    const handler = () => next();
+    video.addEventListener('ended', handler);
+    return () => video.removeEventListener('ended', handler);
+    // mediaKey 变化时 video 元素被 key 强制重建，需要重新绑定
+  }, [next, mediaKey]);
+
+  // 加载播放列表
   useEffect(() => {
     const load = async () => {
       try {
@@ -185,7 +186,7 @@ export default function Screen() {
         }
         setLoaded(true);
 
-        // Try play with sound
+        // 尝试启用声音
         const video = videoRef.current;
         if (video) {
           video.muted = false;
@@ -194,21 +195,18 @@ export default function Screen() {
             testPlay.then(() => {
               setSoundBlocked(false);
               video.pause();
-              reportState('idle');
             }).catch(() => {
               setSoundBlocked(true);
               video.muted = true;
-              reportState('idle');
             });
           }
         }
       } catch {/* ignore */}
     };
     load();
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
-  // Connect SSE
+  // SSE 连接
   useEffect(() => {
     const es = new EventSource('/api/events');
     es.onmessage = (e) => {
@@ -219,12 +217,10 @@ export default function Screen() {
             setPaused(true);
             if (timerRef.current) clearTimeout(timerRef.current);
             if (videoRef.current) videoRef.current.pause();
-            reportState('paused');
             break;
           case 'play':
             setPaused(false);
-            play();
-            reportState('playing');
+            // 由 paused → false 的 useEffect 自动恢复播放
             break;
           case 'next':
             setPaused(false);
@@ -245,13 +241,13 @@ export default function Screen() {
     };
     return () => es.close();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [play, skip, reportState]);
+  }, [skip]);
 
   const reloadPlaylist = useCallback(async () => {
     try {
       const data = await api.getPlaylist();
       const newList = data.files || [];
-      const currentItem = list[index] || null;
+      const currentItem = listRef.current[indexRef.current] || null;
 
       if (newList.length === 0) {
         setList([]);
@@ -276,7 +272,7 @@ export default function Screen() {
         setIndex(prev => Math.min(prev, newList.length - 1));
       }
     } catch {/* ignore */}
-  }, [list, index]);
+  }, []);
 
   const applySettings = useCallback((msg) => {
     if (msg.volume !== undefined) {
@@ -285,7 +281,7 @@ export default function Screen() {
       const video = videoRef.current;
       if (video) {
         video.volume = vol;
-        if (soundBlocked) {
+        if (soundBlockedRef.current) {
           video.muted = false;
           video.play().then(() => {
             setSoundBlocked(false);
@@ -300,7 +296,7 @@ export default function Screen() {
     }
     if (msg.play_mode !== undefined) setPlayMode(msg.play_mode);
     if (msg.image_duration !== undefined) setImageDuration(msg.image_duration);
-  }, [soundBlocked]);
+  }, []);
 
   const enableSound = useCallback(() => {
     const video = videoRef.current;
@@ -316,23 +312,14 @@ export default function Screen() {
     });
   }, []);
 
-  // Video ended handler
-  useEffect(() => {
-    const video = videoRef.current;
-    if (!video) return;
-    const handler = () => next();
-    video.addEventListener('ended', handler);
-    return () => video.removeEventListener('ended', handler);
-  }, [next]);
-
   // Global click for sound unblock
   useEffect(() => {
     const handler = () => {
-      if (soundBlocked) enableSound();
+      if (soundBlockedRef.current) enableSound();
     };
     document.addEventListener('click', handler);
     return () => document.removeEventListener('click', handler);
-  }, [soundBlocked, enableSound]);
+  }, [enableSound]);
 
   // Cleanup timer on unmount
   useEffect(() => {
@@ -355,10 +342,11 @@ export default function Screen() {
       {/* Loader */}
       <Loader hidden={loaded && list.length > 0} text={loaderText} />
 
-      {/* Media Players */}
+      {/* Media Players — key={mediaKey} 强制重建以实现单项目循环 */}
       <video
         ref={videoRef}
         id="player"
+        key={mediaKey}
         autoPlay
         playsInline
         controlsList="nodownload"
@@ -368,7 +356,6 @@ export default function Screen() {
         ref={imgRef}
         id="imgPlayer"
         alt=""
-        src={!showVideo && loaded && currentItem ? getUrl(currentItem) : undefined}
         style={{ display: !showVideo && loaded ? 'block' : 'none' }}
       />