fix: 标签栏滚轮滚动重写

- wheel 事件直接绑定到 #tab-list 元素（而非父容器）
- 支持触控板 deltaX 和鼠标滚轮 deltaY
- 自动滚动到活动标签改为手动计算位置（不依赖 scrollIntoView）
- CSS: #tab-bar 添加 overflow: hidden 防止溢出
- CSS: 滚动条更明显（4px 高，灰色轨道）

src/renderer/components/TabBar/TabBar.tsx

@@ -20,51 +20,55 @@ export function TabBar() {
   const closeAllTabs = useTabStore(s => s.closeAllTabs)
   const closeTabsToRight = useTabStore(s => s.closeTabsToRight)
 
-  const tabBarRef = useRef<HTMLDivElement>(null)
   const tabListRef = useRef<HTMLDivElement>(null)
   const [menu, setMenu] = useState<ContextMenuState>({ visible: false, x: 0, y: 0, tabId: '' })
 
-  // 支持鼠标滚轮水平滚动标签栏
-  useEffect(() => {
-    const tabBar = tabBarRef.current
-    if (!tabBar) return
+  // 滚动到活动标签
+  const scrollToActiveTab = useCallback(() => {
+    const tabList = tabListRef.current
+    if (!tabList) return
+    const activeTab = tabList.querySelector('.tab-item.active') as HTMLElement
+    if (!activeTab) return
 
-    const handleWheel = (e: WheelEvent) => {
-      const tabList = tabListRef.current
-      if (!tabList) return
+    const listRect = tabList.getBoundingClientRect()
+    const tabRect = activeTab.getBoundingClientRect()
 
-      // 只有当标签列表有水平滚动空间时才处理
-      const hasHorizontalScroll = tabList.scrollWidth > tabList.clientWidth
-      if (!hasHorizontalScroll) return
-      
-      // 阻止默认的垂直滚动
-      e.preventDefault()
-      e.stopPropagation()
-      
-      // 计算滚动量：优先使用 deltaX（触控板左右滑动），否则用 deltaY（鼠标滚轮）
-      const scrollAmount = Math.abs(e.deltaX) > Math.abs(e.deltaY) ? e.deltaX : e.deltaY
-      
-      // 应用滚动
-      tabList.scrollLeft += scrollAmount
+    // 如果标签在可视区域左侧之外
+    if (tabRect.left < listRect.left) {
+      tabList.scrollLeft -= (listRect.left - tabRect.left + 20)
+    }
+    // 如果标签在可视区域右侧之外
+    else if (tabRect.right > listRect.right) {
+      tabList.scrollLeft += (tabRect.right - listRect.right + 20)
     }
-
-    // 绑定到 #tab-bar 上，确保能捕获所有滚轮事件
-    tabBar.addEventListener('wheel', handleWheel, { passive: false })
-    return () => tabBar.removeEventListener('wheel', handleWheel)
   }, [])
 
   // 自动滚动到活动标签
   useEffect(() => {
-    if (!tabListRef.current || !activeTabId) return
-    
-    // 使用 requestAnimationFrame 确保 DOM 已更新
-    requestAnimationFrame(() => {
-      const activeTab = tabListRef.current?.querySelector('.tab-item.active')
-      if (activeTab) {
-        activeTab.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'nearest' })
-      }
-    })
-  }, [activeTabId])
+    requestAnimationFrame(scrollToActiveTab)
+  }, [activeTabId, scrollToActiveTab])
+
+  // 支持鼠标滚轮水平滚动标签栏
+  useEffect(() => {
+    const tabList = tabListRef.current
+    if (!tabList) return
+
+    const handleWheel = (e: WheelEvent) => {
+      // 检查是否有水平溢出
+      if (tabList.scrollWidth <= tabList.clientWidth) return
+
+      // 阻止默认滚动
+      e.preventDefault()
+
+      // 计算滚动量：支持触控板 deltaX 和鼠标滚轮 deltaY
+      const delta = Math.abs(e.deltaX) > Math.abs(e.deltaY) ? e.deltaX : e.deltaY
+      tabList.scrollLeft += delta
+    }
+
+    // 直接绑定到 tabList，使用 passive: false 允许 preventDefault
+    tabList.addEventListener('wheel', handleWheel, { passive: false })
+    return () => tabList.removeEventListener('wheel', handleWheel)
+  }, [])
 
   const handleClose = useCallback((e: React.MouseEvent, tabId: string) => {
     e.stopPropagation()
@@ -144,7 +148,7 @@ export function TabBar() {
   if (tabs.length === 0) return null
 
   return (
-    <div id="tab-bar" ref={tabBarRef}>
+    <div id="tab-bar">
       <div id="tab-list" ref={tabListRef}>
         {tabs.map(tab => (
           <div

src/renderer/styles/global.css

@@ -470,7 +470,7 @@ html, body {
   align-items: flex-end;
   padding: 0 4px;
   flex-shrink: 0;
-  /* 不设置 overflow，由 #tab-list 负责滚动 */
+  overflow: hidden;
 }
 
 #tab-list {
@@ -481,26 +481,25 @@ html, body {
   min-width: 0;
   overflow-x: auto;
   overflow-y: hidden;
-  /* 平滑滚动 */
-  scroll-behavior: smooth;
+  scroll-behavior: auto;
 }
 
-/* 标签列表滚动条 */
+/* 滚动条样式 */
 #tab-list::-webkit-scrollbar {
-  height: 3px;
+  height: 4px;
 }
 
 #tab-list::-webkit-scrollbar-thumb {
-  background: var(--border);
+  background: var(--text-tertiary);
   border-radius: 2px;
 }
 
 #tab-list::-webkit-scrollbar-thumb:hover {
-  background: var(--text-tertiary);
+  background: var(--text-secondary);
 }
 
 #tab-list::-webkit-scrollbar-track {
-  background: transparent;
+  background: var(--bg-tertiary);
 }
 
 #tab-list::-webkit-scrollbar-thumb:hover {