feat(search): 效果五快捷栏加入本地搜索

- 引擎选项新增「本地」并作为默认；本地模式回车打开第一个匹配条目/分组
- 快捷栏改为贴在搜索框右侧内部展开，贴合效果五
- 外部引擎仍在新标签页搜索，输入时本地过滤逻辑保持

stash-web/src/App.css

@@ -1478,8 +1478,8 @@ html.theme-transition .site-background {
 
 .engine-menu {
   position: absolute;
-  top: calc(100% + 12px);
-  right: 0;
+  top: 50%;
+  right: calc(100% + 6px);
   z-index: var(--su-z-float);
   display: flex;
   flex-direction: row;
@@ -1489,6 +1489,19 @@ html.theme-transition .site-background {
   border-radius: var(--su-radius-sm);
   background-color: var(--su-bg-card);
   box-shadow: var(--su-shadow-pop);
+  transform: translateY(-50%);
+  animation: engine-bar-in 140ms var(--su-ease-out);
+}
+
+@keyframes engine-bar-in {
+  from {
+    opacity: 0;
+    transform: translate(6px, -50%);
+  }
+  to {
+    opacity: 1;
+    transform: translate(0, -50%);
+  }
 }
 
 .engine-option {

stash-web/src/AppNext.tsx

@@ -63,6 +63,7 @@ type Route =
   | { kind: 'api' }
 
 const SEARCH_ENGINES = [
+  { key: 'local', name: '本地', search: '' },
   { key: 'google', name: 'Google', search: 'https://www.google.com/search?q=' },
   { key: 'bing', name: 'Bing', search: 'https://www.bing.com/search?q=' },
   { key: 'baidu', name: '百度', search: 'https://www.baidu.com/s?wd=' },
@@ -202,6 +203,24 @@ function matches(entry: Record<string, unknown>, keyword: string): boolean {
   return text.includes(keyword)
 }
 
+/** 本地搜索回车时打开第一个匹配项；没有条目命中但分组名命中时打开分组 */
+function findLocalTarget(
+  groups: GroupNode[],
+  keyword: string,
+): { group: GroupNode; entry?: Record<string, unknown> } | undefined {
+  for (const group of groups) {
+    if (group.enabled === false) continue
+    if (group.title.toLowerCase().includes(keyword)) return { group }
+    const entry = (group.entries as unknown as Record<string, unknown>[]).find((item) =>
+      matches(item, keyword),
+    )
+    if (entry !== undefined) return { group, entry }
+    const child = findLocalTarget(group.children, keyword)
+    if (child !== undefined) return child
+  }
+  return undefined
+}
+
 export default function AppNext() {
   const { status, projects, error, live, refreshing, refresh } = useProjects()
   const { route, navigate } = useRoute()
@@ -388,6 +407,20 @@ export default function AppNext() {
       }
       if (event.key !== 'Enter' || keyword.trim() === '') return
       event.preventDefault()
+      setEngineOpen(false)
+
+      if (searchEngine.key === 'local') {
+        const target = findLocalTarget(manage.groups, keywordLower)
+        if (target !== undefined) {
+          navigate(
+            target.entry === undefined
+              ? `/g/${encodeURIComponent(target.group.key)}`
+              : `/g/${encodeURIComponent(target.group.key)}/i/${encodeURIComponent(String(target.entry.id))}`,
+          )
+        }
+        return
+      }
+
       window.open(
         `${searchEngine.search}${encodeURIComponent(keyword.trim())}`,
         '_blank',
@@ -396,7 +429,7 @@ export default function AppNext() {
     }
     input.addEventListener('keydown', handleKeyDown)
     return () => input.removeEventListener('keydown', handleKeyDown)
-  }, [keyword, searchEngine])
+  }, [keyword, keywordLower, manage.groups, navigate, searchEngine])
 
   const chooseEngine = (next: SearchEngine) => {
     setSearchEngine(next)
@@ -797,8 +830,16 @@ export default function AppNext() {
               value={keyword}
               onChange={setKeyword}
               inputRef={searchRef}
-              placeholder="搜索本地项目…"
-              label="搜索本地项目，回车使用当前搜索引擎"
+              placeholder={
+                searchEngine.key === 'local'
+                  ? '搜索本地项目…'
+                  : `用 ${searchEngine.name} 搜索，回车打开…`
+              }
+              label={
+                searchEngine.key === 'local'
+                  ? '搜索本地项目，回车打开第一个匹配项'
+                  : `用 ${searchEngine.name} 搜索，回车打开新标签页`
+              }
               variant="card"
               hotkey="k"
               suffix={
@@ -809,7 +850,11 @@ export default function AppNext() {
                     aria-haspopup="menu"
                     aria-expanded={engineOpen}
                     aria-label={`搜索引擎：${searchEngine.name}，点击切换`}
-                    title={`当前：${searchEngine.name}；回车用该引擎搜索`}
+                    title={
+                      searchEngine.key === 'local'
+                        ? '当前：本地搜索；回车打开第一个匹配项'
+                        : `当前：${searchEngine.name}；回车用该引擎搜索`
+                    }
                     onClick={() => setEngineOpen((open) => !open)}
                   >
                     {searchEngine.name}