feat: 搜索框下滚动、本地服务卡片排序、拖拽末位修复

- 恢复内容区内部滚动：页头/搜索框固定，滚动区域从搜索框下方开始；侧栏跟随内容滚动，侧栏滚轮驱动内容区
- v22：本地服务以 card 行 local-service 参与排序；首页按卡片顺序渲染，后台可拖动排序
- 本地服务卡片后端禁止删除/改名/配置分组
- 修复向下拖动时插到目标之后，倒数第二项可拖到最后
- 验证：搜索框位置固定、侧栏 scrollTop 跟随、本地服务与倒数第二拖末位均落库、首页顺序一致

stash-web/src/AppNext.tsx

@@ -205,6 +205,39 @@ export default function AppNext() {
     }
   }, [])
 
+  useEffect(() => {
+    const content = document.getElementById('content-scroll')
+    const sider = document.querySelector('aside')
+    if (!(content instanceof HTMLElement) || !(sider instanceof HTMLElement)) return
+
+    // 左右两栏共用一个滚动位置：侧栏没有独立滚动条，滚轮也驱动内容区
+    sider.id = 'sidebar-scroll'
+    sider.style.overflow = 'hidden'
+    let frame = 0
+    const sync = () => {
+      if (frame !== 0) return
+      frame = window.requestAnimationFrame(() => {
+        frame = 0
+        sider.scrollTop = content.scrollTop
+      })
+    }
+    const onWheel = (event: WheelEvent) => {
+      event.preventDefault()
+      content.scrollTop += event.deltaY
+    }
+
+    content.addEventListener('scroll', sync, { passive: true })
+    sider.addEventListener('wheel', onWheel, { passive: false })
+
+    return () => {
+      content.removeEventListener('scroll', sync)
+      sider.removeEventListener('wheel', onWheel)
+      if (frame !== 0) window.cancelAnimationFrame(frame)
+      sider.id = ''
+      sider.style.overflow = ''
+    }
+  }, [])
+
   const site: SiteSettings = settings?.settings ?? {
     header: { enabled: true, speed: 24, items: [] },
     sidebar: {
@@ -311,7 +344,7 @@ export default function AppNext() {
     )
   }
 
-  function renderLocalService() {
+  function renderLocalService(card: CardItem) {
     const items: AppItem[] = projects.map((project) => ({
       id: project.name,
       name: project.name,
@@ -325,7 +358,7 @@ export default function AppNext() {
     }))
 
     return (
-      <SectionCard title="本地服务" count={items.length} barColor="#3858f6">
+      <SectionCard key={card.id} title="本地服务" count={items.length} barColor="#3858f6">
         {items.length > 0 ? (
           <AppGrid items={items} />
         ) : (
@@ -367,8 +400,9 @@ export default function AppNext() {
       <div className="home-view">
         {loading && <Empty text="正在读取内容库…" />}
         {!loading && cards.length === 0 && <Empty text="后台还没有创建首页卡片" />}
-        {renderLocalService()}
-        {cards.map(renderCard)}
+        {cards.map((card) =>
+          card.key === 'local-service' ? renderLocalService(card) : renderCard(card),
+        )}
         {keywordLower !== '' && cards.length > 0 && (
           <Notice title={`搜索结果：${keyword.trim()}`}>在卡片与分组内按标题过滤。</Notice>
         )}
@@ -547,6 +581,9 @@ export default function AppNext() {
         siderBordered={false}
         contentPadding="none"
         contentOffset={88}
+        height="screen"
+        scrollable
+        hideScrollbar
         contentId="content-scroll"
         className="app"
         header={