feat(web): 页头滚动信息、移除返回按钮、面包屑左侧可点、侧栏加首页

- 页头中间信息改为无缝滚动 ticker（3 份拼接，24s 线性，尊重 reduced-motion）
- 去掉分区 / 条目 / 文章三处「返回」「返回首页」按钮
- 面包屑移到左侧，中间项可点击并通过 onNavigate 走 SPA 路由
- 侧栏新增「首页」，首页时高亮，点击回首页

stash-web/src/components/sidebar/CategoryNav.tsx

@@ -16,9 +16,14 @@ type CategoryNavProps = {
   /** 当前明细视图的分类 / 分组，用于高亮 */
   activeCategoryId?: string
   activeGroupId?: string
+  /** 是否在首页（高亮「首页」项） */
+  homeActive?: boolean
   onNavigate: (target: NavTarget) => void
+  /** 点击「首页」 */
+  onHome: () => void
 }
 
+const HOME_KEY = 'home'
 const categoryKey = (id: string) => `cat:${id}`
 const groupKey = (categoryId: string, groupId: string) => `group:${categoryId}:${groupId}`
 
@@ -26,35 +31,46 @@ export function CategoryNav({
   categories,
   activeCategoryId,
   activeGroupId,
+  homeActive = false,
   onNavigate,
+  onHome,
 }: CategoryNavProps) {
-  const items: MenuItem[] = categories.map((category) => {
-    const groups =
-      category.kind === 'apps'
-        ? category.groups.filter((group) => group.showInSidebar !== false)
-        : []
+  const items: MenuItem[] = [
+    { key: HOME_KEY, label: '首页' },
+    ...categories.map((category) => {
+      const groups =
+        category.kind === 'apps'
+          ? category.groups.filter((group) => group.showInSidebar !== false)
+          : []
 
-    return {
-      key: categoryKey(category.id),
-      label: category.title,
-      children:
-        groups.length > 0
-          ? groups.map((group) => ({
-              key: groupKey(category.id, group.id),
-              label: group.name,
-            }))
-          : undefined,
-    }
-  })
+      return {
+        key: categoryKey(category.id),
+        label: category.title,
+        children:
+          groups.length > 0
+            ? groups.map((group) => ({
+                key: groupKey(category.id, group.id),
+                label: group.name,
+              }))
+            : undefined,
+      }
+    }),
+  ]
 
-  const activeKey =
-    activeCategoryId === undefined
+  const activeKey = homeActive
+    ? HOME_KEY
+    : activeCategoryId === undefined
       ? undefined
       : activeGroupId !== undefined
         ? groupKey(activeCategoryId, activeGroupId)
         : categoryKey(activeCategoryId)
 
   const handleSelect = (key: string) => {
+    if (key === HOME_KEY) {
+      onHome()
+      return
+    }
+
     if (key.startsWith('group:')) {
       const [, categoryId, groupId] = key.split(':')
       onNavigate({ categoryId, groupId })

stash-web/src/components/sidebar/Sidebar.tsx

@@ -18,7 +18,11 @@ type SidebarProps = {
   onRefresh: () => void
   activeCategoryId?: string
   activeGroupId?: string
+  /** 是否在首页 */
+  homeActive?: boolean
   onNavigate: (target: NavTarget) => void
+  /** 点击「首页」 */
+  onHome: () => void
 }
 
 export function Sidebar({
@@ -29,7 +33,9 @@ export function Sidebar({
   onRefresh,
   activeCategoryId,
   activeGroupId,
+  homeActive = false,
   onNavigate,
+  onHome,
 }: SidebarProps) {
   return (
     <div className="sidebar">
@@ -46,7 +52,9 @@ export function Sidebar({
         categories={categories}
         activeCategoryId={activeCategoryId}
         activeGroupId={activeGroupId}
+        homeActive={homeActive}
         onNavigate={onNavigate}
+        onHome={onHome}
       />
     </div>
   )