feat(dashboard): add hide/show toggle for dashboard plugins in sidebar

- New config key: dashboard.hidden_plugins (list of plugin names)
- GET /api/dashboard/plugins now filters out hidden plugins from sidebar
- POST /api/dashboard/plugins/{name}/visibility toggles visibility
- Hub response includes user_hidden boolean per plugin row
- Eye/EyeOff toggle on plugin cards with dashboard manifests
- i18n: 'Show in sidebar' / 'Hide from sidebar' (en/zh)

web/src/i18n/en.ts

@@ -295,6 +295,8 @@ export const en: Translations = {
     authRequiredHint: "Run this command to authenticate:",
     updateGit: "Git pull",
     versionBadge: "Version",
+    showInSidebar: "Show in sidebar",
+    hideFromSidebar: "Hide from sidebar",
   },
 
   skills: {

web/src/i18n/types.ts

@@ -266,6 +266,8 @@ export interface Translations {
     authRequiredHint: string;
     updateGit: string;
     versionBadge: string;
+    showInSidebar: string;
+    hideFromSidebar: string;
   };
 
   // ── Profiles page ──

web/src/i18n/zh.ts

@@ -291,6 +291,8 @@ export const zh: Translations = {
     authRequiredHint: "运行此命令以完成认证：",
     updateGit: "git pull",
     versionBadge: "版本",
+    showInSidebar: "在侧边栏显示",
+    hideFromSidebar: "从侧边栏隐藏",
   },
 
   skills: {

web/src/lib/api.ts

@@ -299,6 +299,16 @@ export const api = {
       body: JSON.stringify(body),
     }),
 
+  setPluginVisibility: (name: string, hidden: boolean) =>
+    fetchJSON<{ ok: boolean; name: string; hidden: boolean }>(
+      `/api/dashboard/plugins/${encodeURIComponent(name)}/visibility`,
+      {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ hidden }),
+      },
+    ),
+
   // Dashboard themes
   getThemes: () =>
     fetchJSON<DashboardThemesResponse>("/api/dashboard/themes"),
@@ -728,6 +738,7 @@ export interface HubAgentPluginRow {
   can_update_git: boolean;
   auth_required: boolean;
   auth_command: string;
+  user_hidden: boolean;
 }
 
 export interface PluginsHubProviders {

web/src/pages/PluginsPage.tsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useState } from "react";
-import { ExternalLink, RefreshCw, Puzzle, Trash2 } from "lucide-react";
+import { ExternalLink, RefreshCw, Puzzle, Trash2, Eye, EyeOff } from "lucide-react";
 import type { Translations } from "@/i18n/types";
 import { Link } from "react-router-dom";
 import { api } from "@/lib/api";
@@ -504,6 +504,27 @@ function PluginRowCard(props: PluginRowCardProps) {
               </Button>
             ) : null}
 
+            {row.has_dashboard_manifest ? (
+              <Button
+                disabled={busy}
+                ghost
+                size="sm"
+                title={row.user_hidden ? t.pluginsPage.showInSidebar : t.pluginsPage.hideFromSidebar}
+                onClick={() => {
+                  void setRuntimeLoading(row.name, async () => {
+                    await api.setPluginVisibility(row.name, !row.user_hidden);
+                  });
+                }}
+              >
+                {row.user_hidden ? (
+                  <EyeOff className="h-3.5 w-3.5" />
+                ) : (
+                  <Eye className="h-3.5 w-3.5" />
+                )}
+                {row.user_hidden ? t.pluginsPage.showInSidebar : t.pluginsPage.hideFromSidebar}
+              </Button>
+            ) : null}
+
             {row.can_remove ? (