diff --git a/src/App.tsx b/src/App.tsx
index 473fcf5..f301622 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -16,6 +16,8 @@ import {
 } from "@ant-design/icons";
 import { lazy, Suspense, useCallback, useEffect, useMemo, useRef } from "react";
 import ErrorBoundary from "./components/ErrorBoundary";
+import { reportError } from "./utils/errorReporting";
+import { initNotificationPermission } from "./utils/generationNotifier";
 import PageTransition from "./components/PageTransition";
 import ToastContainer from "./components/toast/ToastContainer";
 import { aiGenerationClient } from "./api/aiGenerationClient";
@@ -282,6 +284,25 @@ function App() {
     }
   }, []);
 
+  // Pre-warm notification permission (lazy, on first click)
+  useEffect(() => { initNotificationPermission(); }, []);
+
+  // Global unhandled error / rejection listeners — report to server
+  useEffect(() => {
+    const handleUnhandled = (event: ErrorEvent) => {
+      reportError(event.error || new Error(event.message), "unhandled");
+    };
+    const handleRejection = (event: PromiseRejectionEvent) => {
+      reportError(event.reason instanceof Error ? event.reason : new Error(String(event.reason)), "rejection");
+    };
+    window.addEventListener("error", handleUnhandled);
+    window.addEventListener("unhandledrejection", handleRejection);
+    return () => {
+      window.removeEventListener("error", handleUnhandled);
+      window.removeEventListener("unhandledrejection", handleRejection);
+    };
+  }, []);
+
   // Initialize canvasWorkflow if null
   useEffect(() => {
     if (!canvasWorkflow) {
diff --git a/src/api/keyServerClient.ts b/src/api/keyServerClient.ts
index ea51e68..16b02e0 100644
--- a/src/api/keyServerClient.ts
+++ b/src/api/keyServerClient.ts
@@ -928,4 +928,9 @@ export const keyServerClient = {
       method: "DELETE",
     });
   },
+
+  async getClientErrors(page = 1): Promise<{ items: unknown[]; total: number }> {
+    const data = await request<{ items: unknown[]; total: number }>(`/client-errors?page=${page}`);
+    return data;
+  },
 };
diff --git a/src/components/AdminMonitor.tsx b/src/components/AdminMonitor.tsx
new file mode 100644
index 0000000..4fc41f1
--- /dev/null
+++ b/src/components/AdminMonitor.tsx
@@ -0,0 +1,110 @@
+import { useCallback, useEffect, useRef, useState } from "react";
+import { keyServerClient } from "../api/keyServerClient";
+
+interface ClientErrorItem {
+  id: number;
+  message: string;
+  stack?: string;
+  source: string;
+  url: string;
+  user_agent?: string;
+  user_id?: number;
+  count: number;
+  first_seen: string;
+  last_seen: string;
+}
+
+const STORAGE_KEY = "omniai:admin-monitor-open";
+const POLL_INTERVAL = 30000;
+
+function formatTime(iso: string) {
+  const d = new Date(iso);
+  return d.toLocaleString("zh-CN", { month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit", second: "2-digit" });
+}
+
+function AdminMonitor() {
+  const [open, setOpen] = useState(() => {
+    try { return sessionStorage.getItem(STORAGE_KEY) === "1"; } catch { return false; }
+  });
+  const [errors, setErrors] = useState<ClientErrorItem[]>([]);
+  const [total, setTotal] = useState(0);
+  const [page, setPage] = useState(1);
+  const [loading, setLoading] = useState(false);
+  const intervalRef = useRef<ReturnType<typeof setInterval>>();
+
+  const fetchErrors = useCallback(async (p = 1) => {
+    setLoading(true);
+    try {
+      const data = await keyServerClient.getClientErrors(p);
+      setErrors(data.items);
+      setTotal(data.total);
+      setPage(p);
+    } catch { /* silent */ }
+    setLoading(false);
+  }, []);
+
+  useEffect(() => {
+    if (!open) return;
+    void fetchErrors(1);
+    intervalRef.current = setInterval(() => fetchErrors(1), POLL_INTERVAL);
+    return () => clearInterval(intervalRef.current);
+  }, [open, fetchErrors]);
+
+  useEffect(() => {
+    try { sessionStorage.setItem(STORAGE_KEY, open ? "1" : "0"); } catch { /* */ }
+  }, [open]);
+
+  const maxPage = Math.max(1, Math.ceil(total / 50));
+
+  if (!open) {
+    return (
+      <button type="button" className="admin-monitor-trigger" onClick={() => setOpen(true)} title="错误监控">
+        <span className="admin-monitor-trigger__dot" aria-hidden="true" />
+      </button>
+    );
+  }
+
+  return (
+    <div className="admin-monitor" role="dialog" aria-label="客户端错误监控">
+      <header className="admin-monitor__header">
+        <strong>客户端错误 ({total})</strong>
+        <div className="admin-monitor__actions">
+          <button type="button" onClick={() => void fetchErrors(1)} disabled={loading}>
+            {loading ? "刷新中..." : "刷新"}
+          </button>
+          <button type="button" onClick={() => setOpen(false)}>关闭</button>
+        </div>
+      </header>
+      <section className="admin-monitor__list">
+        {errors.length === 0 ? (
+          <div className="admin-monitor__empty">暂无错误</div>
+        ) : (
+          errors.map((err) => (
+            <details key={err.id} className="admin-monitor__item">
+              <summary>
+                <span className="admin-monitor__source">{err.source}</span>
+                <span className="admin-monitor__msg">{err.message.slice(0, 120)}</span>
+                <span className="admin-monitor__count">{err.count}</span>
+                <time>{formatTime(err.last_seen)}</time>
+              </summary>
+              <div className="admin-monitor__detail">
+                <div><b>URL:</b> {err.url}</div>
+                <div><b>User:</b> {err.user_id || "匿名"}</div>
+                {err.stack ? <pre>{err.stack.slice(0, 1000)}</pre> : null}
+              </div>
+            </details>
+          ))
+        )}
+      </section>
+      {maxPage > 1 ? (
+        <footer className="admin-monitor__pager">
+          <button type="button" disabled={page <= 1} onClick={() => fetchErrors(page - 1)}>上一页</button>
+          <span>{page} / {maxPage}</span>
+          <button type="button" disabled={page >= maxPage} onClick={() => fetchErrors(page + 1)}>下一页</button>
+        </footer>
+      ) : null}
+    </div>
+  );
+}
+
+export default AdminMonitor;
diff --git a/src/components/AppShell.tsx b/src/components/AppShell.tsx
index 48be19d..3457460 100644
--- a/src/components/AppShell.tsx
+++ b/src/components/AppShell.tsx
@@ -21,6 +21,7 @@ import type { WebNavItem, WebNotification, WebUsageSummary, WebUserSession, WebV
 import NotificationCenter from "./NotificationCenter";
 import { RechargeModal } from "./RechargeModal/RechargeModal";
 import { AnimatedPanel } from "./AnimatedPanel";
+import AdminMonitor from "./AdminMonitor";
 
 interface AppShellProps {
   activeView: WebViewKey;
@@ -470,6 +471,7 @@ function AppShell({
           <div className="web-shell__page">{children}</div>
         </main>
       </div>
+      {session?.user.role === "admin" ? <AdminMonitor /> : null}
       <RechargeModal open={rechargeOpen} onClose={() => setRechargeOpen(false)} currentBalance={displayedBalanceCents} />
     </div>
   );
diff --git a/src/features/community/CommunityPage.tsx b/src/features/community/CommunityPage.tsx
index 102b6aa..4770c90 100644
--- a/src/features/community/CommunityPage.tsx
+++ b/src/features/community/CommunityPage.tsx
@@ -7,8 +7,10 @@ import {
   PictureOutlined,
   PlusOutlined,
   RightOutlined,
+  SearchOutlined,
 } from "@ant-design/icons";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useDebounce } from "../../hooks/useDebounce";
 import { communityClient, type ServerCommunityCase } from "../../api/communityClient";
 import WorkspacePageShell from "../../components/WorkspacePageShell";
 import OptimizedImage from "../../components/OptimizedImage";
@@ -70,6 +72,8 @@ function buildWorkflowFromServerCase(item: ServerCommunityCase, fallback: WebCan
 function CommunityPage({ projects, isAuthenticated, onStartCreate, onOpenProject, onDeleteProject, onImportWorkflow, onRequireLogin }: CommunityPageProps) {
   const [serverCases, setServerCases] = useState<ServerCommunityCase[]>([]);
   const [serverNotice, setServerNotice] = useState<string | null>(null);
+  const [query, setQuery] = useState("");
+  const debouncedQuery = useDebounce(query, 300);
   const [favoriteIds, setFavoriteIds] = useState<string[]>([]);
   const canUseProtectedAction = (action: string) => onRequireLogin?.(action) !== false;
 
@@ -260,7 +264,17 @@ function CommunityPage({ projects, isAuthenticated, onStartCreate, onOpenProject
     }
   };
 
-  const liveCases: ServerCommunityCase[] = serverCases.slice(0, 12);
+  const filteredCases = useMemo(() => {
+    const q = debouncedQuery.trim().toLowerCase();
+    if (!q) return serverCases;
+    return serverCases.filter((c) =>
+      (c.title || "").toLowerCase().includes(q) ||
+      (c.description || "").toLowerCase().includes(q) ||
+      (c.tags || []).some((t: string) => t.toLowerCase().includes(q))
+    );
+  }, [serverCases, debouncedQuery]);
+
+  const liveCases: ServerCommunityCase[] = filteredCases.slice(0, 12);
 
   return (
     <WorkspacePageShell title="社区" fullWidth className="community-page page-motion">
@@ -387,6 +401,15 @@ function CommunityPage({ projects, isAuthenticated, onStartCreate, onOpenProject
           <div>
             <h2>社区精选</h2>
           </div>
+          <label className="asset-search">
+            <SearchOutlined />
+            <input
+              value={query}
+              onChange={(e) => setQuery(e.target.value)}
+              placeholder="搜索案例..."
+            />
+            {query ? <button type="button" className="asset-search__clear" onClick={() => setQuery("")} aria-label="清除搜索">×</button> : null}
+          </label>
           {serverNotice ? <span className="studio-pill">{serverNotice}</span> : null}
         </div>
         {liveCases.length ? (
@@ -473,8 +496,8 @@ function CommunityPage({ projects, isAuthenticated, onStartCreate, onOpenProject
         ) : (
           <EmptyState
             icon={<ImportOutlined style={{ fontSize: 48 }} />}
-            title="社区暂无模板"
-            description="管理员审核通过后，画布社区案例会显示在这里。"
+            title={debouncedQuery ? "无匹配结果" : "社区暂无模板"}
+            description={debouncedQuery ? "尝试其他关键词，或清除搜索查看全部案例" : "管理员审核通过后，画布社区案例会显示在这里。"}
           />
         )}
       </section>
diff --git a/src/features/home/WelcomeSplash.tsx b/src/features/home/WelcomeSplash.tsx
index 63418d3..e9a0271 100644
--- a/src/features/home/WelcomeSplash.tsx
+++ b/src/features/home/WelcomeSplash.tsx
@@ -15,7 +15,7 @@ const prefersReducedMotion = typeof window !== "undefined"
 export default function WelcomeSplash({ onEnter }: WelcomeSplashProps) {
   const canvasRef = useRef<HTMLCanvasElement>(null);
   const rafRef = useRef(0);
-  const [showWelcome, setShowWelcome] = useState(false);
+  const [showWelcome, setShowWelcome] = useState(true);
   const [exiting, setExiting] = useState(false);
 
   const handleEnter = useCallback(() => {
diff --git a/src/features/workbench/WorkbenchPage.tsx b/src/features/workbench/WorkbenchPage.tsx
index 7830b48..9777ba8 100644
--- a/src/features/workbench/WorkbenchPage.tsx
+++ b/src/features/workbench/WorkbenchPage.tsx
@@ -949,6 +949,11 @@ function WorkbenchPage({
               await patchConversationMessage(task.conversationId, task.assistantMessageId, completedPatch);
               removeKeepaliveTask(task.taskId);
               onRefreshUsage?.();
+              if (status.status === "completed") {
+                import("../../utils/generationNotifier").then((m) =>
+                  m.notifyTaskCompleted(task.mode === "video" ? "视频" : "图片", task.mode as "image" | "video"),
+                );
+              }
               try {
                 if (status.resultUrl) {
                   const persistedResult = await persistWorkbenchResultAsset({
@@ -992,6 +997,11 @@ function WorkbenchPage({
               });
               removeKeepaliveTask(task.taskId);
               onRefreshUsage?.();
+              if (status.status === "completed") {
+                import("../../utils/generationNotifier").then((m) =>
+                  m.notifyTaskCompleted(task.mode === "video" ? "视频" : "图片", task.mode as "image" | "video"),
+                );
+              }
               return;
             }
 
@@ -2105,7 +2115,7 @@ function WorkbenchPage({
       return;
     }
     if (getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id)) >= 3) {
-      setProjectError("当前任务数已达上限（3个），请等待任务完成后再试");
+      setProjectError(`当前已有 ${getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id))} 个任务进行中（上限3个），请等待任一任务完成后再提交新任务`);
       return;
     }
     if (!isAuthenticated) {
@@ -2227,7 +2237,7 @@ function WorkbenchPage({
       return;
     }
     if (getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id)) >= 3) {
-      setProjectError("当前任务数已达上限（3个），请等待任务完成后再试");
+      setProjectError(`当前已有 ${getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id))} 个任务进行中（上限3个），请等待任一任务完成后再提交新任务`);
       return;
     }
     if (!isAuthenticated) {
diff --git a/src/styles/shell/app-shell.css b/src/styles/shell/app-shell.css
index 98847c6..da19b01 100644
--- a/src/styles/shell/app-shell.css
+++ b/src/styles/shell/app-shell.css
@@ -642,3 +642,187 @@
 .info-popover__links a:hover {
   text-decoration: underline;
 }
+
+/* ── Admin monitor ──────────────────────────── */
+.admin-monitor-trigger {
+  position: fixed;
+  bottom: 16px;
+  right: 16px;
+  z-index: 200;
+  display: grid;
+  width: 36px;
+  height: 36px;
+  place-items: center;
+  border: 1px solid rgba(var(--accent-rgb), 0.3);
+  border-radius: 50%;
+  background: var(--bg-panel);
+  cursor: pointer;
+  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
+}
+
+.admin-monitor-trigger__dot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background: var(--accent);
+  animation: admin-monitor-pulse 2s ease-in-out infinite;
+}
+
+@keyframes admin-monitor-pulse {
+  0%, 100% { opacity: 0.4; transform: scale(1); }
+  50% { opacity: 1; transform: scale(1.3); }
+}
+
+.admin-monitor {
+  position: fixed;
+  bottom: 60px;
+  right: 16px;
+  z-index: 199;
+  width: min(480px, calc(100vw - 32px));
+  max-height: 70vh;
+  display: flex;
+  flex-direction: column;
+  border: 1px solid var(--border-normal);
+  border-radius: 12px;
+  background: var(--bg-panel);
+  box-shadow: 0 8px 40px rgba(0,0,0,0.35);
+  overflow: hidden;
+}
+
+.admin-monitor__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 12px 16px;
+  border-bottom: 1px solid var(--border-weak);
+}
+
+.admin-monitor__header strong {
+  font-size: 13px;
+  color: var(--fg-body);
+}
+
+.admin-monitor__actions {
+  display: flex;
+  gap: 6px;
+}
+
+.admin-monitor__actions button {
+  padding: 3px 12px;
+  border: 1px solid var(--border-normal);
+  border-radius: 5px;
+  background: transparent;
+  color: var(--fg-muted);
+  font-size: 11px;
+  cursor: pointer;
+}
+
+.admin-monitor__actions button:hover:not(:disabled) {
+  border-color: var(--accent);
+  color: var(--accent);
+}
+
+.admin-monitor__list {
+  flex: 1;
+  overflow: auto;
+  padding: 8px;
+}
+
+.admin-monitor__empty {
+  padding: 24px;
+  text-align: center;
+  color: var(--fg-muted);
+  font-size: 12px;
+}
+
+.admin-monitor__item {
+  border-bottom: 1px solid var(--border-weak);
+}
+
+.admin-monitor__item summary {
+  display: grid;
+  grid-template-columns: 60px 1fr 36px 100px;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 4px;
+  cursor: pointer;
+  font-size: 11px;
+}
+
+.admin-monitor__source {
+  display: inline-block;
+  padding: 2px 6px;
+  border-radius: 3px;
+  background: rgba(var(--accent-rgb), 0.12);
+  color: var(--accent);
+  font-size: 10px;
+  font-weight: 700;
+  text-align: center;
+}
+
+.admin-monitor__msg {
+  overflow: hidden;
+  color: var(--fg-body);
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.admin-monitor__count {
+  display: inline-block;
+  min-width: 24px;
+  padding: 1px 5px;
+  border-radius: 999px;
+  background: rgba(255, 107, 53, 0.15);
+  color: #ff6b35;
+  font-size: 10px;
+  font-weight: 800;
+  text-align: center;
+}
+
+.admin-monitor__item time {
+  color: var(--fg-muted);
+  font-size: 10px;
+  text-align: right;
+}
+
+.admin-monitor__detail {
+  padding: 8px 12px 12px;
+  color: var(--fg-muted);
+  font-size: 11px;
+  line-height: 1.6;
+}
+
+.admin-monitor__detail pre {
+  margin-top: 6px;
+  padding: 8px;
+  border-radius: 4px;
+  background: var(--bg-inset);
+  font-size: 10px;
+  max-height: 120px;
+  overflow: auto;
+}
+
+.admin-monitor__pager {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 8px;
+  border-top: 1px solid var(--border-weak);
+  font-size: 11px;
+  color: var(--fg-muted);
+}
+
+.admin-monitor__pager button {
+  padding: 2px 10px;
+  border: 1px solid var(--border-normal);
+  border-radius: 4px;
+  background: transparent;
+  color: var(--fg-muted);
+  cursor: pointer;
+}
+
+.admin-monitor__pager button:hover:not(:disabled) {
+  border-color: var(--accent);
+  color: var(--accent);
+}
diff --git a/src/utils/generationNotifier.ts b/src/utils/generationNotifier.ts
new file mode 100644
index 0000000..d8b459b
--- /dev/null
+++ b/src/utils/generationNotifier.ts
@@ -0,0 +1,50 @@
+/**
+ * Browser notification + in-app toast for generation task completions.
+ * Falls back gracefully when Notification API is unavailable.
+ */
+
+let permissionGranted = false;
+
+async function requestPermission(): Promise<boolean> {
+  if (permissionGranted) return true;
+  if (typeof Notification === "undefined") return false;
+  if (Notification.permission === "granted") { permissionGranted = true; return true; }
+  if (Notification.permission === "denied") return false;
+  try {
+    const result = await Notification.requestPermission();
+    permissionGranted = result === "granted";
+    return permissionGranted;
+  } catch {
+    return false;
+  }
+}
+
+export function notifyTaskCompleted(label: string, mode: "image" | "video" = "image") {
+  const emoji = mode === "video" ? "🎬" : "🖼️";
+  const title = `${emoji} ${label}生成完成`;
+  const body = "点击返回查看生成结果";
+
+  // Browser notification (background tab)
+  if (typeof Notification !== "undefined" && Notification.permission === "granted") {
+    try { new Notification(title, { body, icon: "/favicon.ico", tag: "gen-complete" }); } catch { /* */ }
+  }
+
+  // In-app toast
+  dispatchGenToast(title);
+}
+
+// Use the existing toast system for in-app notifications
+function dispatchGenToast(msg: string) {
+  try {
+    import("../components/toast/toastStore").then((m) => m.toast(msg, "success"));
+  } catch { /* toast system not loaded */ }
+}
+
+/** Call once on app init to pre-warm permission. */
+export async function initNotificationPermission() {
+  if (typeof Notification === "undefined") return;
+  if (Notification.permission === "default") {
+    // Don't prompt immediately — wait for first user interaction
+    document.addEventListener("click", () => requestPermission(), { once: true });
+  }
+}