feat: 播放控制移入页眉 + 媒体铺满智能裁切

页眉播放控制（仅媒体轮播页）：
- 新增 MediaHeaderControls：播放/暂停、上一段/下一段、序号、当前文件名（点击进后台）、声音解锁
- 新增 mediaControl 共享状态桥：媒体页同步播放状态，页眉订阅渲染并下发指令
- 移除媒体页底部控制区，媒体区保持纯净全屏

媒体展示：
- .ms-media 改为 object-fit: cover，填满整个容器并智能居中裁切（原 contain 留黑边）

修复：
- MediaScreen useEffect 依赖数组引用后声明函数导致的 TDZ 崩溃
- 清理 MediaScreen 中不再使用的 Icon/cleanName/togglePlayPause

src/components/MediaHeaderControls.jsx

@@ -0,0 +1,78 @@
+import { useState, useEffect } from 'react';
+import Icon from './Icons';
+import { onMediaUiState, mediaCommand } from '../utils/mediaControl';
+
+/* =========================================================
+   页眉媒体控制区 —— 仅媒体轮播页显示
+   订阅媒体页播放状态（paused/index/total/name/soundBlocked），
+   点击通过 mediaCommand() 下发指令，由 MediaScreen 执行
+   ========================================================= */
+
+/** 展示名清洗：URL 只取文件名，不显示完整播放地址 */
+function cleanName(name) {
+  if (!name) return '';
+  const text = String(name);
+  try {
+    const u = new URL(text);
+    const last = decodeURIComponent(u.pathname.split('/').filter(Boolean).pop() || '');
+    return last ? `${last}${u.search ? ' …' : ''}` : text;
+  } catch {
+    return text;
+  }
+}
+
+export default function MediaHeaderControls() {
+  const [st, setSt] = useState(null);
+
+  useEffect(() => onMediaUiState(setSt), []);
+
+  if (!st || !st.loaded) {
+    return (
+      <div className="bd-hd-media" title="媒体播放控制">
+        <Icon name="player-play" size={13} />
+      </div>
+    );
+  }
+
+  const showName = cleanName(st.name) || '等待播放…';
+
+  return (
+    <div className="bd-hd-media">
+      {/* 播放 / 暂停 */}
+      <button
+        className={`bd-hd-media-btn ${st.paused ? 'primary' : ''}`}
+        onClick={() => mediaCommand(st.paused ? 'play' : 'pause')}
+        title={st.paused ? '播放' : '暂停'}
+      >
+        <Icon name={st.paused ? 'play' : 'pause'} size={14} />
+      </button>
+      {/* 上一段 */}
+      <button className="bd-hd-media-btn" onClick={() => mediaCommand('prev')} title="上一段">
+        <Icon name="chevron-left" size={13} />
+      </button>
+      {/* 序号 */}
+      <span className="bd-hd-media-num">
+        <b>{st.index + 1}</b>/<em>{st.total}</em>
+      </span>
+      {/* 下一段 */}
+      <button className="bd-hd-media-btn" onClick={() => mediaCommand('next')} title="下一段">
+        <Icon name="chevron-right" size={13} />
+      </button>
+      {/* 当前播放名（点击进入后台） */}
+      <button
+        className="bd-hd-media-name"
+        onClick={() => mediaCommand('open_login')}
+        title="点击进入后台"
+      >
+        <span className="bd-hd-media-dot" />
+        <span>{showName}</span>
+      </button>
+      {/* 声音解锁 */}
+      {st.soundBlocked && (
+        <button className="bd-hd-media-btn warn" onClick={() => mediaCommand('enable_sound')} title="点击开启声音">
+          <Icon name="volume" size={14} />
+        </button>
+      )}
+    </div>
+  );
+}

src/components/PageHeader.jsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from 'react';
 import { useNavigate, useLocation } from 'react-router-dom';
 import Icon from './Icons';
+import MediaHeaderControls from './MediaHeaderControls';
 import { PAGE_ORDER, usePageIndex } from '../utils/pageNav';
 import { Avatar, AvatarImage, AvatarFallback } from '@appica/ui-react/avatar'
 
@@ -52,6 +53,8 @@ export default function PageHeader() {
         </div>
       </div>
       <div className="bd-header-right">
+        {/* 媒体轮播页：页眉内嵌播放控制 */}
+        {location.pathname === '/screen' && <MediaHeaderControls />}
         <div className="bd-nav-keys" title="左右方向键或点击切换页面">
           {left && (
             <button className="bd-nav-key" onClick={() => navigate(left.path)}>

src/pages/MediaScreen.jsx

@@ -4,9 +4,9 @@ import * as api from '../utils/api';
 import { API_BASE } from '../utils/api';
 import { getCurrentWindow } from '@tauri-apps/api/window';
 import { enable, disable } from '@tauri-apps/plugin-autostart';
-import Icon from '../components/Icons';
 import ParkOverviewStrip from '../components/ParkOverviewStrip';
 import { useParkSim } from '../utils/parkData';
+import { setMediaUiState } from '../utils/mediaControl';
 import '../styles/datascreen.css';
 import '../styles/mediascreen.css';
 
@@ -16,19 +16,6 @@ import '../styles/mediascreen.css';
    页脚（园区概览条）按需保留，中间为全屏媒体播放器
    ========================================================= */
 
-/** 展示名清洗：URL 只取文件名，不显示完整播放地址 */
-function cleanName(name) {
-  if (!name) return '';
-  const text = String(name);
-  try {
-    const u = new URL(text);
-    const last = decodeURIComponent(u.pathname.split('/').filter(Boolean).pop() || '');
-    return last ? `${last}${u.search ? ' …' : ''}` : text;
-  } catch {
-    return text;
-  }
-}
-
 export default function MediaScreen() {
   const d = useParkSim();
   const navigate = useNavigate();
@@ -322,6 +309,48 @@ export default function MediaScreen() {
     }
   }, []);
 
+  const enableSound = useCallback(() => {
+    const video = videoRef.current;
+    if (!video) return;
+    video.muted = false;
+    video.play().then(() => {
+      setSoundBlocked(false);
+      const hint = document.getElementById('soundHint');
+      if (hint) hint.style.display = 'none';
+    }).catch(() => {
+      video.muted = true;
+      video.play().catch(() => {});
+    });
+  }, []);
+
+  // ============ 登录弹窗 ============
+  const handleTitleClick = useCallback(() => {
+    setLoginUsername('');
+    setLoginPassword('');
+    setLoginError('');
+    setShowLoginModal(true);
+    if (loginTimerRef.current) clearTimeout(loginTimerRef.current);
+    loginTimerRef.current = setTimeout(() => {
+      setShowLoginModal(false);
+    }, 30000);
+    setTimeout(() => {
+      if (loginInputRef.current) loginInputRef.current.focus();
+    }, 100);
+  }, []);
+
+  // 播放状态同步到页眉控制区
+  useEffect(() => {
+    const item = list[index];
+    setMediaUiState({
+      paused,
+      index,
+      total: list.length,
+      name: item ? item.name : '',
+      soundBlocked,
+      loaded,
+    });
+  }, [paused, index, list, soundBlocked, loaded]);
+
   // MQTT 控制通道（后端 opc/display/command → window 事件）
   useEffect(() => {
     const handler = (e) => {
@@ -352,6 +381,12 @@ export default function MediaScreen() {
         case 'minimize':
           getCurrentWindow().minimize().catch(() => {});
           break;
+        case 'open_login':
+          handleTitleClick();
+          break;
+        case 'enable_sound':
+          enableSound();
+          break;
         case 'playlist_changed':
           reloadPlaylist();
           break;
@@ -364,36 +399,7 @@ export default function MediaScreen() {
     };
     window.addEventListener('dpm:media-control', handler);
     return () => window.removeEventListener('dpm:media-control', handler);
-  }, [skip, reloadPlaylist, applySettings, playTarget]);
-
-  const enableSound = useCallback(() => {
-    const video = videoRef.current;
-    if (!video) return;
-    video.muted = false;
-    video.play().then(() => {
-      setSoundBlocked(false);
-      const hint = document.getElementById('soundHint');
-      if (hint) hint.style.display = 'none';
-    }).catch(() => {
-      video.muted = true;
-      video.play().catch(() => {});
-    });
-  }, []);
-
-  // ============ 登录弹窗 ============
-  const handleTitleClick = useCallback(() => {
-    setLoginUsername('');
-    setLoginPassword('');
-    setLoginError('');
-    setShowLoginModal(true);
-    if (loginTimerRef.current) clearTimeout(loginTimerRef.current);
-    loginTimerRef.current = setTimeout(() => {
-      setShowLoginModal(false);
-    }, 30000);
-    setTimeout(() => {
-      if (loginInputRef.current) loginInputRef.current.focus();
-    }, 100);
-  }, []);
+  }, [skip, reloadPlaylist, applySettings, playTarget, handleTitleClick, enableSound]);
 
   const handleCloseLogin = useCallback(() => {
     if (loginTimerRef.current) clearTimeout(loginTimerRef.current);
@@ -419,18 +425,6 @@ export default function MediaScreen() {
     if (e.key === 'Enter') handleLoginSubmit();
   }, [handleLoginSubmit]);
 
-  // ============ 播放/暂停 ============
-  const togglePlayPause = useCallback(() => {
-    if (pausedRef.current) {
-      setPaused(false);
-    } else {
-      setPaused(true);
-      const video = videoRef.current;
-      if (video) video.pause();
-      if (timerRef.current) clearTimeout(timerRef.current);
-    }
-  }, []);
-
   // Global click for sound unblock
   useEffect(() => {
     const handler = () => {
@@ -509,36 +503,7 @@ export default function MediaScreen() {
           </div>
         )}
 
-        {/* 右下角轻量播放控制（弱化） */}
-        <div className={`ms-controls${loaded ? ' visible' : ''}`}>
-          {/* 播放/暂停 */}
-          <button className="ms-play" onClick={togglePlayPause} title={paused ? '播放' : '暂停'}>
-            <Icon name={paused ? 'play' : 'pause'} size={15} />
-          </button>
-          {/* 上一段 / 下一段 */}
-          <div className="ms-nav">
-            <button onClick={() => skip(-1)} title="上一段">
-              <Icon name="chevron-left" size={13} />
-            </button>
-            <span className="ms-nav-num">
-              <b>{currentItem ? `${index + 1}` : '0'}</b>
-              <em>/ {list.length}</em>
-            </span>
-            <button onClick={() => skip(1)} title="下一段">
-              <Icon name="chevron-right" size={13} />
-            </button>
-          </div>
-          {/* 当前播放（仅文件名，不显示完整地址；点击进入后台） */}
-          <div className="ms-now" onClick={handleTitleClick} title="点击进入后台" style={{ cursor: 'pointer' }}>
-            <span className="ms-now-dot" />
-            <span className="ms-now-name">{currentItem ? cleanName(currentItem.name) : '等待播放…'}</span>
-          </div>
-          {/* 声音 */}
-          <div id="soundHint" className="ms-sound" style={{ display: soundBlocked && loaded ? 'flex' : 'none' }} onClick={enableSound}>
-            <Icon name="volume" size={13} />
-            点击开启声音
-          </div>
-        </div>
+        {/* 播放控制已上移页眉（PageHeader 内渲染，媒体区保持纯净全屏） */}
       </main>
 
       {/* 页脚：园区概览（与数据大屏一致） */}

src/styles/datascreen.css

@@ -2461,3 +2461,96 @@
 .bd-cell-jobs { grid-column: 5; }
 
 /* 底部园区概览（见 .bd-strip 区块） */
+
+/* ============ 页眉媒体播放控制（仅媒体轮播页） ============ */
+.bd-hd-media {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 3px 8px;
+  background: rgba(255, 255, 255, 0.7);
+  border: 1px solid rgba(47, 107, 255, 0.14);
+  border-radius: 9px;
+  flex-shrink: 0;
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+}
+.bd-hd-media-btn {
+  width: 24px;
+  height: 24px;
+  border: none;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--bd-blue);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+.bd-hd-media-btn:hover {
+  background: rgba(47, 107, 255, 0.12);
+}
+.bd-hd-media-btn.primary {
+  color: #fff;
+  background: linear-gradient(140deg, var(--bd-blue), var(--bd-cyan));
+  box-shadow: 0 3px 8px rgba(47, 107, 255, 0.3);
+}
+.bd-hd-media-btn.warn {
+  color: var(--bd-orange);
+}
+.bd-hd-media-num {
+  font-family: "JetBrains Mono", "Oswald", monospace;
+  font-size: 11px;
+  color: var(--bd-sub);
+  display: inline-flex;
+  align-items: baseline;
+  gap: 2px;
+  padding: 0 2px;
+}
+.bd-hd-media-num b {
+  font-size: 12px;
+  color: var(--bd-ink);
+}
+.bd-hd-media-num em {
+  font-style: normal;
+  font-size: 10px;
+}
+.bd-hd-media-name {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  max-width: 160px;
+  padding: 3px 8px;
+  border: none;
+  border-radius: 6px;
+  background: transparent;
+  font-size: 11px;
+  font-weight: 600;
+  font-family: inherit;
+  color: var(--bd-sub);
+  cursor: pointer;
+  overflow: hidden;
+}
+.bd-hd-media-name > span:last-child {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.bd-hd-media-name:hover {
+  background: rgba(47, 107, 255, 0.08);
+  color: var(--bd-ink);
+}
+.bd-hd-media-dot {
+  width: 6px;
+  height: 6px;
+  flex-shrink: 0;
+  border-radius: 50%;
+  background: var(--bd-green);
+  box-shadow: 0 0 6px rgba(23, 178, 106, 0.8);
+  animation: bdPulse 1.6s ease-in-out infinite;
+}
+/* 窄屏：页眉控制区收起名称，保留核心按钮 */
+@media (max-width: 1280px) {
+  .bd-hd-media-name { display: none; }
+}

src/styles/mediascreen.css

@@ -67,13 +67,14 @@
   -webkit-backdrop-filter: blur(14px);
 }
 
-/* 媒体播放器（铺满媒体区，等比适配） */
+/* 媒体播放器（填满整个媒体区，等比裁切铺满） */
 .ms-media {
   position: absolute;
   inset: 0;
   width: 100%;
   height: 100%;
-  object-fit: contain;
+  object-fit: cover;
+  object-position: center;
   background: transparent;
 }
 
@@ -109,127 +110,7 @@
   border-bottom: 1px solid rgba(47, 107, 255, 0.3);
 }
 
-/* 右下角轻量播放控制（弱化悬浮） */
-.ms-controls {
-  position: absolute;
-  right: 16px;
-  bottom: 14px;
-  left: auto;
-  transform: none;
-  z-index: 10;
-  display: flex;
-  align-items: center;
-  gap: 8px;
-  padding: 6px 12px;
-  background: rgba(255, 255, 255, 0.55);
-  border: 1px solid rgba(120, 160, 220, 0.16);
-  border-radius: 30px;
-  backdrop-filter: blur(12px);
-  -webkit-backdrop-filter: blur(12px);
-  box-shadow: 0 6px 22px rgba(56, 100, 170, 0.12);
-  opacity: 0;
-  transition: opacity 0.5s ease;
-}
-.ms-controls.visible { opacity: 1; }
-
-.ms-play {
-  width: 30px;
-  height: 30px;
-  border-radius: 50%;
-  border: none;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  color: #fff;
-  background: linear-gradient(140deg, var(--bd-blue, #2f6bff), var(--bd-cyan, #4cc2ff));
-  cursor: pointer;
-  box-shadow: 0 4px 12px rgba(47, 107, 255, 0.3);
-  transition: transform 0.2s;
-}
-.ms-play:hover { transform: scale(1.08); }
-
-.ms-nav {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-}
-.ms-nav button {
-  width: 26px;
-  height: 26px;
-  border-radius: 50%;
-  border: 1px solid rgba(47, 107, 255, 0.18);
-  background: rgba(255, 255, 255, 0.6);
-  color: var(--bd-blue, #2f6bff);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  cursor: pointer;
-  transition: all 0.2s;
-}
-.ms-nav button:hover {
-  background: rgba(47, 107, 255, 0.12);
-  border-color: rgba(47, 107, 255, 0.5);
-}
-.ms-nav-num {
-  display: inline-flex;
-  align-items: baseline;
-  gap: 3px;
-  font-family: "JetBrains Mono", "Oswald", monospace;
-}
-.ms-nav-num b {
-  font-size: 13px;
-  color: var(--bd-ink, #1d2c44);
-}
-.ms-nav-num em {
-  font-style: normal;
-  font-size: 10.5px;
-  color: var(--bd-sub, #7d8fa9);
-}
-
-.ms-now {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  padding-left: 10px;
-  border-left: 1px solid rgba(47, 107, 255, 0.12);
-}
-.ms-now-dot {
-  width: 6px;
-  height: 6px;
-  border-radius: 50%;
-  background: var(--bd-green, #17b26a);
-  box-shadow: 0 0 8px rgba(23, 178, 106, 0.8);
-  animation: msPulse 1.6s ease-in-out infinite;
-}
-@keyframes msPulse {
-  0%, 100% { opacity: 1; transform: scale(1); }
-  50% { opacity: 0.4; transform: scale(0.75); }
-}
-.ms-now-name {
-  font-size: 11px;
-  font-weight: 500;
-  color: var(--bd-sub, #7d8fa9);
-  max-width: 160px;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-/* 声音提示 */
-.ms-sound {
-  display: inline-flex;
-  align-items: center;
-  gap: 6px;
-  padding: 5px 11px;
-  font-size: 11px;
-  font-weight: 500;
-  color: #4a5b76;
-  background: rgba(255, 255, 255, 0.75);
-  border: 1px solid rgba(47, 107, 255, 0.14);
-  border-radius: 30px;
-  cursor: pointer;
-}
-.ms-sound .appica-ico { color: var(--bd-blue, #2f6bff); }
+/* 播放控制已上移页眉（见 datascreen.css .bd-hd-media） */
 
 /* 页脚 */
 .ms-page .bd-strip { z-index: 10; position: relative; }

src/utils/mediaControl.js

@@ -0,0 +1,37 @@
+/* =========================================================
+   媒体播放控制桥 —— 页眉控制区与媒体页之间的共享状态
+   · 媒体页把播放状态同步进来（paused/index/total/name/soundBlocked/loaded）
+   · 页眉控制区订阅状态渲染，并通过 mediaCommand() 下发指令
+   ========================================================= */
+
+let state = {
+  paused: false,
+  index: 0,
+  total: 0,
+  name: '',
+  soundBlocked: false,
+  loaded: false,
+};
+
+const listeners = new Set();
+
+export function setMediaUiState(patch) {
+  state = { ...state, ...patch };
+  listeners.forEach((fn) => fn(state));
+}
+
+export function getMediaUiState() {
+  return state;
+}
+
+/** 订阅状态，返回取消函数 */
+export function onMediaUiState(fn) {
+  listeners.add(fn);
+  fn(state);
+  return () => listeners.delete(fn);
+}
+
+/** 页眉控制区下发指令（媒体页监听 dpm:media-control 执行） */
+export function mediaCommand(action, params) {
+  window.dispatchEvent(new CustomEvent('dpm:media-control', { detail: { action, params } }));
+}