fix(agents): 私有 tab 未解锁时隐藏搜索栏

私有广场只有在功能可用且校验过密码后才解锁;未解锁时展示门禁/解锁提示并
隐藏关键词/标签搜索栏(此时没有可筛选的列表)。TagSearchBar 按 tab key 重挂载,
切 tab 时内部关键词输入与展开状态随父级筛选一起重置。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/components/workspace/agents/agent-gallery.tsx

@@ -112,6 +112,12 @@ export function AgentGallery() {
     }
   }, [privateError, privatePassword]);
 
+  // The private tab is only "unlocked" once the feature is usable and a
+  // password has been verified. Until then we show the gate (or the lock
+  // prompt) and hide the keyword/tag search bar — there is no list to filter.
+  const privateUnlocked = privateFeatureUsable && !!privatePassword;
+  const showSearchBar = activeTab !== "private" || privateUnlocked;
+
   const activeTotal = activeTab === "private" ? privateTotal : mainTotal;
   const setTabPage = (tab: "all" | "mine" | "private", page: number) =>
     setPages((prev) => ({ ...prev, [tab]: page }));
@@ -359,35 +365,39 @@ export function AgentGallery() {
               )}
             </div>
           </div>
-          <TagSearchBar
-            // Remount per tab so the internal keyword input / 展开 state also
-            // resets when the parent-owned filters are cleared on tab switch.
-            key={activeTab}
-            targetType="agent"
-            searching={activeTab === "private" ? isPrivateFetching : mainFetching}
-            onSearchChange={setSearch}
-            tagIds={tagIds}
-            onTagIdsChange={setTagIds}
-            actions={
-              <Select value={sort} onValueChange={(v) => setSort(v as AgentSort)}>
-                <SelectTrigger
-                  className="h-9 w-full gap-2 px-3 text-xs sm:w-[148px]"
-                  title="排序"
-                >
-                  <ArrowDownUpIcon className="text-muted-foreground size-3.5" />
-                  <SelectValue />
-                </SelectTrigger>
-                <SelectContent position="popper" side="bottom" sideOffset={4}>
-                  <SelectItem value="time_desc">最新创建</SelectItem>
-                  <SelectItem value="time_asc">最早创建</SelectItem>
-                  <SelectItem value="updated_desc">最近更新</SelectItem>
-                  <SelectItem value="updated_asc">最早更新</SelectItem>
-                  <SelectItem value="name_asc">名称 A-Z</SelectItem>
-                  <SelectItem value="name_desc">名称 Z-A</SelectItem>
-                </SelectContent>
-              </Select>
-            }
-          />
+          {showSearchBar && (
+            <TagSearchBar
+              // Remount per tab so the internal keyword input / 展开 state also
+              // resets when the parent-owned filters are cleared on tab switch.
+              key={activeTab}
+              targetType="agent"
+              searching={
+                activeTab === "private" ? isPrivateFetching : mainFetching
+              }
+              onSearchChange={setSearch}
+              tagIds={tagIds}
+              onTagIdsChange={setTagIds}
+              actions={
+                <Select value={sort} onValueChange={(v) => setSort(v as AgentSort)}>
+                  <SelectTrigger
+                    className="h-9 w-full gap-2 px-3 text-xs sm:w-[148px]"
+                    title="排序"
+                  >
+                    <ArrowDownUpIcon className="text-muted-foreground size-3.5" />
+                    <SelectValue />
+                  </SelectTrigger>
+                  <SelectContent position="popper" side="bottom" sideOffset={4}>
+                    <SelectItem value="time_desc">最新创建</SelectItem>
+                    <SelectItem value="time_asc">最早创建</SelectItem>
+                    <SelectItem value="updated_desc">最近更新</SelectItem>
+                    <SelectItem value="updated_asc">最早更新</SelectItem>
+                    <SelectItem value="name_asc">名称 A-Z</SelectItem>
+                    <SelectItem value="name_desc">名称 Z-A</SelectItem>
+                  </SelectContent>
+                </Select>
+              }
+            />
+          )}
           {publisher && (
             <div className="flex items-center gap-2">
               <span className="text-muted-foreground text-xs">筛选发布者：</span>