diff --git a/apps/web/src/features/auth/ServerLogin.svelte b/apps/web/src/features/auth/ServerLogin.svelte
index 147724d..b895727 100644
--- a/apps/web/src/features/auth/ServerLogin.svelte
+++ b/apps/web/src/features/auth/ServerLogin.svelte
@@ -99,13 +99,24 @@
 
 <main class="login-page">
   <section class="login-panel" aria-labelledby="login-title">
-    <div class="login-brand" aria-hidden="true">SA</div>
-    <div class="login-heading">
-      <p>Private workbench</p>
-      <h1 id="login-title">SenlinAI Workbench</h1>
+    <div class="login-brand-panel">
+      <div class="login-brand" aria-hidden="true">S</div>
+      <h1>SenlinAI</h1>
+      <p>私有部署 · 安全可控的智能协作平台</p>
+      <small>知识沉淀 · 团队协作 · AI 助理</small>
+      <nav class="login-links" aria-label="Login resources">
+        <a href="/" on:click|preventDefault>隐私政策</a>
+        <a href="/" on:click|preventDefault>服务协议</a>
+        <a href="/" on:click|preventDefault>关于 SenlinAI</a>
+      </nav>
     </div>
 
     <form class="server-login" aria-label="Server login" on:submit|preventDefault={submitLogin}>
+      <div class="login-heading">
+        <p>登录到您的 SenlinAI</p>
+        <h2 id="login-title">连接私有工作台</h2>
+      </div>
+
       <label for="server-address">Server IP or domain</label>
       <input id="server-address" name="server" bind:value={server} placeholder="http://localhost:8080" />
 
@@ -130,5 +141,15 @@
       <button type="submit">Log in</button>
       <p class="login-note">The server address is remembered on this device.</p>
     </form>
+
+    <aside class="login-value-panel" aria-label="Product values">
+      <h2>安全 · 专注 · 高效</h2>
+      <p>SenlinAI 是面向知识工作者与内部团队的私有部署工作台，帮助团队在统一空间中收集信息、整理知识、协同决策。</p>
+      <ul>
+        <li><strong>私有部署，数据自有</strong><span>所有数据与模型运行在您的环境中。</span></li>
+        <li><strong>知识沉淀，结构清晰</strong><span>从收集到整理，形成可复用的团队知识。</span></li>
+        <li><strong>协同高效，聚焦成果</strong><span>围绕项目与任务协同，减少沟通成本。</span></li>
+      </ul>
+    </aside>
   </section>
 </main>
diff --git a/apps/web/src/features/workbench/ProjectRail.svelte b/apps/web/src/features/workbench/ProjectRail.svelte
index 495bffc..be4dd5c 100644
--- a/apps/web/src/features/workbench/ProjectRail.svelte
+++ b/apps/web/src/features/workbench/ProjectRail.svelte
@@ -16,9 +16,9 @@
       title={project.name}
       on:click={() => onSelectProject(project.id)}
     >
-      <span>{project.initials}</span>
+      <span class="project-initials">{project.initials}</span>
       {#if project.unreadCount}
-        <small>{project.unreadCount}</small>
+        <small class:urgent={project.unreadCount > 20} aria-label={`${project.name} updates ${project.unreadCount}`}>{project.unreadCount}</small>
       {/if}
     </button>
   {/each}
diff --git a/apps/web/src/features/workbench/ProjectWorkbench.svelte b/apps/web/src/features/workbench/ProjectWorkbench.svelte
index f95fa73..be184c5 100644
--- a/apps/web/src/features/workbench/ProjectWorkbench.svelte
+++ b/apps/web/src/features/workbench/ProjectWorkbench.svelte
@@ -5,10 +5,12 @@
   import ProjectRail from './ProjectRail.svelte';
   import ProjectChannelSidebar from './ProjectChannelSidebar.svelte';
   import WorkspaceTopbar from './WorkspaceTopbar.svelte';
+  import WorkspaceStatusBar from './WorkspaceStatusBar.svelte';
   import type { InspectorItem, WorkTask } from './types';
 
   export let currentUser: { account: string };
 
+  let theme: 'light' | 'dark' = 'light';
   let selectedProjectID = workbenchProjects[0].id;
   let selectedItem: InspectorItem | null = null;
   let tasksByProjectID: Record<number, WorkTask[]> = Object.fromEntries(
@@ -39,10 +41,14 @@
       [selectedProjectID]: tasks.map((task) => task.id === taskID ? { ...task, completed: !task.completed } : task),
     };
   }
+
+  function toggleTheme() {
+    theme = theme === 'light' ? 'dark' : 'light';
+  }
 </script>
 
-<main class="workbench-shell">
-  <WorkspaceTopbar account={currentUser.account} />
+<main class="workbench-shell" aria-label="SenlinAI workbench" data-theme={theme}>
+  <WorkspaceTopbar {theme} onToggleTheme={toggleTheme} />
   <div class="workbench-body">
     <ProjectRail projects={workbenchProjects} {selectedProjectID} onSelectProject={selectProject} />
     <ProjectChannelSidebar
@@ -58,4 +64,5 @@
     </section>
     <ObjectInspector item={selectedItem} />
   </div>
+  <WorkspaceStatusBar account={currentUser.account} />
 </main>
diff --git a/apps/web/src/features/workbench/ProjectWorkbench.test.ts b/apps/web/src/features/workbench/ProjectWorkbench.test.ts
index 1fda28b..4f5c1da 100644
--- a/apps/web/src/features/workbench/ProjectWorkbench.test.ts
+++ b/apps/web/src/features/workbench/ProjectWorkbench.test.ts
@@ -9,12 +9,51 @@ describe('ProjectWorkbench', () => {
 
     expect(screen.getByLabelText('Project list')).toBeInTheDocument();
     expect(screen.getByRole('button', { name: 'Project A1' })).toHaveAttribute('aria-pressed', 'true');
+    expect(screen.getByLabelText('Project A1 updates 36')).toBeInTheDocument();
     expect(screen.getByLabelText('Project channels')).toBeInTheDocument();
     expect(screen.getByRole('button', { name: 'Message Flow 36' })).toBeInTheDocument();
-    expect(screen.getByLabelText('Global search')).toBeDisabled();
+    expect(screen.getByLabelText('Global search')).toBeEnabled();
+    expect(screen.getByRole('button', { name: 'Search workspace' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Switch to dark mode' })).toBeInTheDocument();
     expect(screen.getByLabelText('Object inspector')).toBeInTheDocument();
   });
 
+  it('pins user actions and task status to the page bottom bar', () => {
+    render(ProjectWorkbench, { props: { currentUser: { account: 'david@example.com' } } });
+    const statusBar = screen.getByLabelText('Workspace status');
+
+    expect(within(statusBar).getByText('david@example.com')).toBeInTheDocument();
+    expect(within(statusBar).getByRole('button', { name: 'Friends' })).toBeInTheDocument();
+    expect(within(statusBar).getByRole('button', { name: 'Direct messages' })).toBeInTheDocument();
+    expect(within(statusBar).getByRole('button', { name: 'Settings' })).toBeInTheDocument();
+    expect(within(statusBar).getByText('Sync complete')).toBeInTheDocument();
+    expect(within(statusBar).getByText('3 tasks running')).toBeInTheDocument();
+    expect(within(statusBar).getByText('AI queue idle')).toBeInTheDocument();
+    expect(within(statusBar).getByText('Draft saved')).toBeInTheDocument();
+  });
+
+  it('shows overview work queues below the metric cards', () => {
+    render(ProjectWorkbench, { props: { currentUser: { account: 'david@example.com' } } });
+
+    expect(screen.getByRole('heading', { name: 'Inbox 待处理' })).toBeInTheDocument();
+    expect(screen.getByRole('heading', { name: '进行中的任务' })).toBeInTheDocument();
+    expect(screen.getByRole('heading', { name: 'AI 会话' })).toBeInTheDocument();
+    expect(screen.getByText('Collect competitor pricing notes')).toBeInTheDocument();
+    expect(screen.getByText('Confirm homepage information architecture')).toBeInTheDocument();
+  });
+
+  it('toggles between light and dark workbench palettes', async () => {
+    render(ProjectWorkbench, { props: { currentUser: { account: 'david@example.com' } } });
+    const shell = screen.getByLabelText('SenlinAI workbench');
+
+    expect(shell).toHaveAttribute('data-theme', 'light');
+
+    await fireEvent.click(screen.getByRole('button', { name: 'Switch to dark mode' }));
+
+    expect(shell).toHaveAttribute('data-theme', 'dark');
+    expect(screen.getByRole('button', { name: 'Switch to light mode' })).toBeInTheDocument();
+  });
+
   it('refreshes channels when switching projects', async () => {
     render(ProjectWorkbench, { props: { currentUser: { account: 'david@example.com' } } });
 
diff --git a/apps/web/src/features/workbench/WorkspaceStatusBar.svelte b/apps/web/src/features/workbench/WorkspaceStatusBar.svelte
new file mode 100644
index 0000000..2375a18
--- /dev/null
+++ b/apps/web/src/features/workbench/WorkspaceStatusBar.svelte
@@ -0,0 +1,30 @@
+<script lang="ts">
+  export let account: string;
+
+  $: userInitials = account.slice(0, 2).toUpperCase();
+</script>
+
+<footer class="workspace-statusbar" aria-label="Workspace status">
+  <section class="statusbar-user" aria-label="Current user">
+    <span class="user-avatar" aria-hidden="true">{userInitials}</span>
+    <span class="user-meta">
+      <strong>{account}</strong>
+      <small>在线</small>
+    </span>
+    <button type="button" aria-label="Friends">好友</button>
+    <button type="button" aria-label="Direct messages">私信</button>
+    <button type="button" aria-label="Settings">设置</button>
+  </section>
+
+  <section class="statusbar-tasks" aria-label="Task status">
+    <span>Sync complete</span>
+    <span>3 tasks running</span>
+    <span>AI queue idle</span>
+    <span>Draft saved</span>
+  </section>
+
+  <section class="statusbar-system" aria-label="System status">
+    <span>本地存储 152GB 可用</span>
+    <span>系统健康 正常</span>
+  </section>
+</footer>
diff --git a/apps/web/src/features/workbench/WorkspaceTopbar.svelte b/apps/web/src/features/workbench/WorkspaceTopbar.svelte
index 33f7564..802d31b 100644
--- a/apps/web/src/features/workbench/WorkspaceTopbar.svelte
+++ b/apps/web/src/features/workbench/WorkspaceTopbar.svelte
@@ -1,16 +1,25 @@
 <script lang="ts">
-  export let account: string;
+  export let theme: 'light' | 'dark' = 'light';
+  export let onToggleTheme: () => void = () => {};
 </script>
 
 <header class="workspace-topbar">
-  <div class="brand-mark">SenlinAI</div>
-  <label class="search-box">
-    <span>Search</span>
-    <input aria-label="Global search" title="Global search is unavailable in this preview" placeholder="Search projects, tasks, notes, AI sessions" disabled />
-  </label>
+  <div class="brand-mark" aria-label="SenlinAI">
+    <span class="brand-logo">S</span>
+    <span>SenlinAI</span>
+  </div>
+  <form class="search-box" role="search" aria-label="Workspace search" on:submit|preventDefault>
+    <label class="sr-only" for="global-search">Search</label>
+    <input id="global-search" aria-label="Global search" placeholder="搜索项目、频道、文档、任务、联系人..." />
+    <button type="submit" aria-label="Search workspace">搜索</button>
+  </form>
   <div class="topbar-actions">
-    <button aria-label="Back" disabled>&#8592;</button>
-    <button aria-label="Forward" disabled>&#8594;</button>
-    <button aria-label={`Account ${account}`} disabled>{account.slice(0, 2).toUpperCase()}</button>
+    <button class="theme-toggle" type="button" aria-label={theme === 'light' ? 'Switch to dark mode' : 'Switch to light mode'} on:click={onToggleTheme}>
+      <span aria-hidden="true">{theme === 'light' ? '☾' : '☀'}</span>
+    </button>
+    <button aria-label="Back" disabled>←</button>
+    <button aria-label="Forward" disabled>→</button>
+    <button aria-label="Notifications" disabled>!</button>
+    <button aria-label="Help" disabled>?</button>
   </div>
 </header>
diff --git a/apps/web/src/features/workbench/channels/OverviewChannel.svelte b/apps/web/src/features/workbench/channels/OverviewChannel.svelte
index 6d478cf..5421b8e 100644
--- a/apps/web/src/features/workbench/channels/OverviewChannel.svelte
+++ b/apps/web/src/features/workbench/channels/OverviewChannel.svelte
@@ -15,8 +15,14 @@
 
 <section class="channel-page overview-channel">
   <header class="channel-header">
-    <p>{workspace.project.name}</p>
-    <h1>Overview</h1>
+    <div>
+      <p>{workspace.project.name}</p>
+      <h1>Overview</h1>
+    </div>
+    <div class="overview-tools" aria-label="Overview filters">
+      <span>2026-07-20</span>
+      <button type="button" aria-label="More overview actions">...</button>
+    </div>
   </header>
   <div class="metric-list">
     {#each metrics(workspace) as metric}
@@ -26,4 +32,117 @@
       </button>
     {/each}
   </div>
+
+  <div class="overview-grid">
+    <section class="overview-section">
+      <header>
+        <h2>Inbox 待处理</h2>
+        <a href="/" on:click|preventDefault>查看全部</a>
+      </header>
+      <div class="overview-rows">
+        {#each workspace.inbox as message}
+          <button
+            type="button"
+            class="overview-row"
+            on:click={() => onInspect({
+              title: message.title,
+              type: 'Inbox message',
+              description: message.summary,
+              properties: [
+                { label: 'Source', value: message.source },
+                { label: 'Status', value: message.status },
+                { label: 'Tag', value: message.tag },
+              ],
+            })}
+          >
+            <span>{message.title}</span>
+            <small>来源 {message.source} · #{message.tag}</small>
+            <time>{message.time}</time>
+          </button>
+        {/each}
+      </div>
+    </section>
+
+    <section class="overview-section">
+      <header>
+        <h2>进行中的任务</h2>
+        <a href="/" on:click|preventDefault>查看全部</a>
+      </header>
+      <div class="overview-rows">
+        {#each workspace.tasks as task}
+          <button
+            type="button"
+            class="overview-row"
+            on:click={() => onInspect({
+              title: task.title,
+              type: 'Task',
+              description: task.summary,
+              properties: [
+                { label: 'Status', value: task.completed ? 'Done' : 'Open' },
+                { label: 'Owner', value: task.owner },
+                { label: 'Due', value: task.due },
+              ],
+            })}
+          >
+            <span>{task.title}</span>
+            <small>负责人 {task.owner} · #{task.tag}</small>
+            <time>{task.due}</time>
+          </button>
+        {/each}
+      </div>
+    </section>
+
+    <section class="overview-section">
+      <header>
+        <h2>AI 会话</h2>
+        <a href="/" on:click|preventDefault>查看全部</a>
+      </header>
+      <div class="overview-rows">
+        {#each workspace.aiSessions as session}
+          <button
+            type="button"
+            class="overview-row"
+            on:click={() => onInspect({
+              title: session.title,
+              type: 'AI session',
+              description: session.summary,
+              properties: session.references.map((reference) => ({ label: 'Reference', value: reference })),
+            })}
+          >
+            <span>{session.title}</span>
+            <small>{session.summary}</small>
+            <time>{session.updatedAt}</time>
+          </button>
+        {/each}
+      </div>
+    </section>
+
+    <section class="overview-section">
+      <header>
+        <h2>最近笔记资料</h2>
+        <a href="/" on:click|preventDefault>查看全部</a>
+      </header>
+      <div class="overview-rows">
+        {#each workspace.notesSources as item}
+          <button
+            type="button"
+            class="overview-row"
+            on:click={() => onInspect({
+              title: item.title,
+              type: item.kind,
+              description: `${item.source} · ${item.tag}`,
+              properties: [
+                { label: 'Updated', value: item.updatedAt },
+                { label: 'Tag', value: item.tag },
+              ],
+            })}
+          >
+            <span>{item.title}</span>
+            <small>{item.source} · #{item.tag}</small>
+            <time>{item.updatedAt}</time>
+          </button>
+        {/each}
+      </div>
+    </section>
+  </div>
 </section>
diff --git a/apps/web/src/index.css b/apps/web/src/index.css
index ea3f080..2c3e6a3 100644
--- a/apps/web/src/index.css
+++ b/apps/web/src/index.css
@@ -1,19 +1,24 @@
 :root {
-  color: #18181b;
-  background: #f4f4f5;
+  color: #1d2129;
+  background: #f7f8fa;
   font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
   line-height: 1.5;
-  --background: #f4f4f5;
+  --background: #f7f8fa;
   --panel: #ffffff;
-  --panel-muted: #fafafa;
-  --border: #d4d4d8;
-  --text: #18181b;
-  --muted: #71717a;
-  --primary: #0f7ae5;
-  --primary-strong: #0969c8;
-  --success: #15803d;
-  --danger: #b91c1c;
-  --radius: 8px;
+  --panel-muted: #f2f3f5;
+  --border: #e5e6eb;
+  --text: #1d2129;
+  --muted: #86909c;
+  --subtle: #4e5969;
+  --primary: #165dff;
+  --primary-strong: #0e42d2;
+  --primary-soft: #e8f3ff;
+  --success: #00b42a;
+  --warning: #ff7d00;
+  --danger: #f53f3f;
+  --statusbar: #142033;
+  --statusbar-border: #22314a;
+  --radius: 6px;
 }
 
 * { box-sizing: border-box; }
@@ -21,51 +26,84 @@ body { margin: 0; min-width: 320px; min-height: 100vh; }
 button, input, textarea, select { font: inherit; }
 button { cursor: pointer; }
 button:focus-visible, input:focus-visible, a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
-button:disabled { cursor: not-allowed; opacity: 0.55; }
+button:disabled { cursor: not-allowed; opacity: 0.58; }
+a { color: inherit; text-decoration: none; }
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
 
 .login-page {
   min-height: 100vh;
   display: grid;
   place-items: center;
-  padding: 24px;
-  background: var(--background);
+  padding: 28px;
+  background:
+    radial-gradient(circle at top left, rgba(22, 93, 255, 0.08), transparent 32%),
+    var(--background);
 }
 
 .login-panel {
-  width: min(420px, 100%);
-  border: 1px solid var(--border);
-  border-radius: var(--radius);
-  background: var(--panel);
-  padding: 24px;
-}
-
-.server-login,
-.login-heading,
-.channel-page,
-.object-inspector,
-.channel-sidebar {
+  width: min(1200px, 100%);
+  min-height: 420px;
   display: grid;
-  gap: 12px;
-}
-
-.server-login input,
-.search-box input {
-  width: 100%;
+  grid-template-columns: 1fr 1.1fr 1fr;
+  overflow: hidden;
   border: 1px solid var(--border);
-  border-radius: 6px;
-  padding: 9px 10px;
-  background: white;
+  border-radius: 8px;
+  background: var(--panel);
+  box-shadow: 0 10px 30px rgba(29, 33, 41, 0.08);
 }
 
-.server-login button,
-.primary-action {
-  border: 1px solid var(--primary);
-  border-radius: 6px;
+.login-brand-panel,
+.server-login,
+.login-value-panel {
+  padding: 36px 42px;
+}
+
+.login-brand-panel {
+  display: grid;
+  align-content: center;
+  gap: 10px;
+  border-right: 1px solid var(--border);
+}
+
+.login-brand {
+  width: 42px;
+  height: 42px;
+  display: grid;
+  place-items: center;
+  border-radius: 10px;
   background: var(--primary);
   color: white;
-  padding: 9px 12px;
+  font-weight: 800;
+  font-size: 1.35rem;
 }
 
+.login-brand-panel h1,
+.login-heading h2,
+.login-value-panel h2 {
+  margin: 0;
+  color: var(--text);
+}
+
+.login-brand-panel h1 { font-size: 1.8rem; }
+.login-brand-panel p,
+.login-value-panel p {
+  margin: 0;
+  color: var(--subtle);
+}
+
+.login-brand-panel small,
+.login-links,
 .connection-status,
 .login-note,
 .form-error,
@@ -78,34 +116,202 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   font-size: 0.875rem;
 }
 
+.login-links {
+  align-self: end;
+  display: flex;
+  gap: 18px;
+  margin-top: 72px;
+}
+
+.server-login,
+.login-heading,
+.channel-page,
+.object-inspector,
+.channel-sidebar {
+  display: grid;
+  gap: 12px;
+}
+
+.login-heading { gap: 4px; }
+.login-heading p { margin: 0; color: var(--text); font-weight: 600; }
+.login-heading h2 { font-size: 1rem; font-weight: 500; color: var(--muted); }
+
+.server-login {
+  border-right: 1px solid var(--border);
+}
+
+.server-login label {
+  color: var(--subtle);
+  font-size: 0.8125rem;
+  font-weight: 600;
+}
+
+.server-login input,
+.search-box input {
+  width: 100%;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: white;
+  color: var(--text);
+}
+
+.server-login input {
+  height: 36px;
+  padding: 8px 10px;
+}
+
+.server-login button,
+.primary-action {
+  height: 38px;
+  border: 1px solid var(--primary);
+  border-radius: var(--radius);
+  background: var(--primary);
+  color: white;
+  padding: 0 14px;
+  font-weight: 600;
+}
+
 .form-error { color: var(--danger); }
 
+.connection-status {
+  border: 1px solid #7be188;
+  border-radius: var(--radius);
+  background: #f0fff4;
+  color: #168a2f;
+  padding: 8px 10px;
+}
+
+.login-value-panel {
+  display: grid;
+  align-content: center;
+  gap: 18px;
+}
+
+.login-value-panel ul {
+  display: grid;
+  gap: 18px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.login-value-panel li {
+  display: grid;
+  gap: 3px;
+  padding-left: 16px;
+  border-left: 3px solid var(--primary-soft);
+}
+
+.login-value-panel strong { color: var(--text); }
+.login-value-panel span { color: var(--muted); font-size: 0.875rem; }
+
 .workbench-shell {
   min-height: 100vh;
   display: grid;
-  grid-template-rows: 64px 1fr;
+  grid-template-rows: 58px minmax(0, 1fr) 32px;
+  background: var(--background);
+  color: var(--text);
+}
+
+.workbench-shell[data-theme='dark'] {
+  --background: #1e1e1e;
+  --panel: #252526;
+  --panel-muted: #2d2d30;
+  --border: #3c3c3c;
+  --text: #cccccc;
+  --muted: #858585;
+  --subtle: #a7a7a7;
+  --primary: #007acc;
+  --primary-strong: #1890e8;
+  --primary-soft: rgba(0, 122, 204, 0.22);
+  --statusbar: #007acc;
+  --statusbar-border: #1f6feb;
 }
 
 .workspace-topbar {
   display: grid;
-  grid-template-columns: 160px minmax(240px, 1fr) auto;
+  grid-template-columns: 192px minmax(420px, 1fr) auto;
   align-items: center;
-  gap: 16px;
+  gap: 18px;
   border-bottom: 1px solid var(--border);
   background: var(--panel);
   padding: 0 16px;
 }
 
-.brand-mark { font-weight: 700; }
-.search-box { display: grid; gap: 4px; min-width: 0; }
-.search-box span { color: var(--muted); font-size: 0.75rem; }
-.topbar-actions { display: flex; gap: 8px; }
-.topbar-actions button { width: 34px; height: 34px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel); }
+.brand-mark {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  font-size: 1.05rem;
+  font-weight: 700;
+}
+
+.brand-logo {
+  width: 28px;
+  height: 28px;
+  display: grid;
+  place-items: center;
+  border-radius: 7px;
+  background: var(--primary);
+  color: white;
+  font-weight: 800;
+}
+
+.search-box {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 72px;
+  align-items: center;
+  max-width: 680px;
+  min-width: 0;
+  height: 42px;
+  border: 1px solid var(--primary);
+  border-radius: 7px;
+  background: var(--panel);
+  box-shadow: 0 0 0 2px rgba(22, 93, 255, 0.06);
+}
+
+.search-box input {
+  height: 40px;
+  border: 0;
+  padding: 0 16px;
+  background: transparent;
+}
+
+.search-box button {
+  height: 40px;
+  border: 0;
+  border-left: 1px solid var(--primary);
+  border-radius: 0 6px 6px 0;
+  background: var(--primary);
+  color: white;
+  font-weight: 600;
+}
+
+.topbar-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.topbar-actions button {
+  width: 32px;
+  height: 32px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--panel);
+  color: var(--subtle);
+}
+
+.topbar-actions .theme-toggle {
+  width: 56px;
+  background: var(--panel-muted);
+  color: var(--primary);
+}
 
 .workbench-body {
   min-height: 0;
   display: grid;
-  grid-template-columns: 76px 280px minmax(0, 1fr) 320px;
+  grid-template-columns: 88px 248px minmax(0, 1fr) 330px;
 }
 
 .project-rail,
@@ -118,26 +324,48 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
 .project-rail {
   display: grid;
   align-content: start;
-  gap: 10px;
-  padding: 12px;
+  gap: 12px;
+  padding: 14px 12px;
 }
 
 .project-rail button {
-  min-width: 48px;
-  min-height: 48px;
+  position: relative;
+  width: 56px;
+  min-height: 56px;
+  display: grid;
+  place-items: center;
+  gap: 2px;
   border: 1px solid var(--border);
-  border-radius: 999px;
+  border-radius: 8px;
   background: var(--panel-muted);
+  color: var(--subtle);
 }
 
-.project-rail button.active,
-.channel-group button.active {
+.project-rail button.active {
   border-color: var(--primary);
-  color: var(--primary);
-  background: #eff6ff;
+  background: var(--primary);
+  color: white;
 }
 
-.project-rail small { color: var(--muted); font-size: 0.6875rem; }
+.project-initials { font-weight: 700; }
+
+.project-rail small {
+  position: absolute;
+  top: -6px;
+  right: -7px;
+  min-width: 19px;
+  height: 19px;
+  display: grid;
+  place-items: center;
+  border: 2px solid var(--panel);
+  border-radius: 999px;
+  background: var(--primary);
+  color: white;
+  font-size: 0.625rem;
+  line-height: 1;
+}
+
+.project-rail small.urgent { background: var(--danger); }
 
 .channel-sidebar,
 .object-inspector,
@@ -157,6 +385,46 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   width: 100%;
 }
 
+.channel-sidebar header {
+  display: flex;
+  align-items: start;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.channel-sidebar header p,
+.channel-sidebar h2,
+.channel-sidebar h3 { margin: 0; }
+.channel-sidebar h2 { font-size: 1rem; }
+.channel-sidebar h3 { color: var(--muted); font-size: 0.8125rem; font-weight: 600; }
+
+.channel-sidebar header button {
+  width: 30px;
+  height: 30px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--panel-muted);
+}
+
+.tag-row,
+.recent-sessions ul {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.tag-row li {
+  border: 1px solid var(--border);
+  border-radius: 999px;
+  padding: 3px 8px;
+  background: var(--panel-muted);
+  color: var(--muted);
+  font-size: 0.75rem;
+}
+
 .channel-group,
 .task-list,
 .record-list,
@@ -167,14 +435,91 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   gap: 8px;
 }
 
-.channel-group button,
+.channel-group button {
+  width: 100%;
+  min-height: 34px;
+  display: grid;
+  grid-template-columns: 18px minmax(0, 1fr) auto;
+  gap: 8px;
+  align-items: center;
+  border: 0;
+  border-radius: var(--radius);
+  background: transparent;
+  color: var(--text);
+  padding: 7px 9px;
+  text-align: left;
+}
+
+.channel-group button.active {
+  color: var(--primary);
+  background: var(--primary-soft);
+  box-shadow: inset 3px 0 0 var(--primary);
+}
+
+.channel-group small {
+  min-width: 26px;
+  border-radius: 999px;
+  background: var(--panel-muted);
+  color: var(--muted);
+  padding: 1px 6px;
+  text-align: center;
+}
+
+.channel-icon { color: currentColor; text-align: center; }
+.recent-sessions { display: grid; gap: 8px; }
+.recent-sessions li { display: grid; gap: 2px; min-width: 0; padding: 7px 8px; border-radius: var(--radius); }
+.recent-sessions span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.8125rem; }
+.recent-sessions small { color: var(--muted); font-size: 0.6875rem; }
+
+.channel-stage { background: var(--background); }
+.channel-page { align-content: start; }
+.channel-header {
+  display: flex;
+  align-items: end;
+  justify-content: space-between;
+  border-bottom: 1px solid var(--border);
+  padding-bottom: 12px;
+}
+.channel-header h1,
+.channel-page h2 { margin: 0; }
+.channel-header h1 { font-size: 1.125rem; }
+.channel-page h2 { font-size: 0.9375rem; }
+.channel-page h2 + p { margin: 4px 0; }
+
+.overview-tools {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.overview-tools span,
+.overview-tools button {
+  height: 30px;
+  display: inline-flex;
+  align-items: center;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--panel);
+  color: var(--subtle);
+  padding: 0 10px;
+  font-size: 0.8125rem;
+}
+
+.overview-tools button { width: 34px; justify-content: center; }
+
+.metric-list {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
+  gap: 10px;
+}
+
+.metric-card,
 .task-card,
 .record-row,
 .cron-row,
 .message-row,
 .file-row,
-.conversation-summary,
-.metric-card {
+.conversation-summary {
   width: 100%;
   border: 1px solid var(--border);
   border-radius: var(--radius);
@@ -182,6 +527,85 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   padding: 10px 12px;
 }
 
+.metric-card {
+  display: grid;
+  gap: 4px;
+  text-align: left;
+}
+
+.metric-card strong { font-size: 1.45rem; color: var(--text); }
+.metric-card span { color: var(--muted); font-size: 0.8125rem; }
+
+.overview-grid {
+  display: grid;
+  gap: 12px;
+}
+
+.overview-section {
+  display: grid;
+  gap: 6px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--panel);
+  padding: 10px 12px;
+}
+
+.overview-section header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.overview-section h2 {
+  font-size: 0.875rem;
+}
+
+.overview-section a {
+  color: var(--primary);
+  font-size: 0.75rem;
+  font-weight: 600;
+}
+
+.overview-rows {
+  display: grid;
+}
+
+.overview-row {
+  width: 100%;
+  display: grid;
+  grid-template-columns: minmax(160px, 1fr) minmax(180px, 1.1fr) auto;
+  gap: 12px;
+  align-items: center;
+  border: 0;
+  border-top: 1px solid var(--border);
+  background: transparent;
+  color: var(--text);
+  padding: 8px 0;
+  text-align: left;
+}
+
+.overview-row:first-child {
+  border-top: 0;
+}
+
+.overview-row span,
+.overview-row small {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.overview-row span {
+  font-weight: 600;
+}
+
+.overview-row small,
+.overview-row time {
+  color: var(--muted);
+  font-size: 0.75rem;
+}
+
 .task-card,
 .record-row,
 .cron-row,
@@ -200,54 +624,31 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
 
 .task-check { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--primary); }
 .task-status { display: inline-block; margin-top: 6px; color: var(--muted); font-size: 0.75rem; }
-
-.channel-sidebar header { display: flex; align-items: start; justify-content: space-between; gap: 12px; }
-.channel-sidebar header p,
-.channel-sidebar h2,
-.channel-sidebar h3 { margin: 0; }
-.channel-sidebar h2 { font-size: 1rem; }
-.channel-sidebar h3 { color: var(--muted); font-size: 0.8125rem; font-weight: 600; }
-.channel-sidebar header button { width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel-muted); }
-.tag-row,
-.recent-sessions ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
-.tag-row li { border: 1px solid var(--border); border-radius: 999px; padding: 3px 7px; color: var(--muted); font-size: 0.75rem; }
-.channel-group button { display: grid; grid-template-columns: 18px minmax(0, 1fr) auto; gap: 8px; align-items: center; text-align: left; }
-.channel-group small { color: var(--muted); }
-.channel-icon { color: var(--muted); text-align: center; }
-.recent-sessions { display: grid; gap: 8px; }
-.recent-sessions li { display: grid; gap: 2px; min-width: 0; padding: 7px 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel-muted); }
-.recent-sessions span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.8125rem; }
-.recent-sessions small { color: var(--muted); font-size: 0.6875rem; }
-
-.channel-stage { background: var(--background); }
-.channel-page { align-content: start; }
-.channel-header { border-bottom: 1px solid var(--border); padding-bottom: 12px; }
-.channel-header h1,
-.channel-page h2 { margin: 0; }
-.channel-header h1 { font-size: 1.25rem; }
-.channel-page h2 { font-size: 0.9375rem; }
-.channel-page h2 + p { margin: 4px 0; }
-.metric-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
-.metric-card { display: grid; gap: 4px; text-align: left; }
-.metric-card strong { font-size: 1.5rem; }
-.metric-card span { color: var(--muted); font-size: 0.8125rem; }
 .message-row { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
 .file-row { grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; }
 .file-row > span { min-width: 40px; border: 1px solid var(--border); border-radius: 4px; padding: 3px 5px; color: var(--muted); font-size: 0.6875rem; text-align: center; text-transform: uppercase; }
 .message-row p,
 .cron-row p,
 .conversation-summary p { margin: 4px 0; }
+
 .message-row button,
 .file-row button,
 .task-card > button,
 .cron-row button,
 .conversation-summary button,
 .copy-url-button,
-.object-inspector button { border: 1px solid var(--border); border-radius: 6px; background: var(--panel); padding: 6px 9px; }
+.object-inspector button {
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--panel);
+  color: var(--text);
+  padding: 6px 9px;
+}
+
 .session-layout { display: grid; grid-template-columns: minmax(180px, 0.7fr) minmax(0, 1.3fr); gap: 12px; }
 .session-list { display: grid; align-content: start; gap: 6px; }
-.session-list button { display: grid; gap: 3px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel); padding: 9px; text-align: left; }
-.session-list button.active { border-color: var(--primary); background: #eff6ff; }
+.session-list button { display: grid; gap: 3px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); padding: 9px; text-align: left; }
+.session-list button.active { border-color: var(--primary); background: var(--primary-soft); }
 .session-list small { color: var(--muted); }
 .conversation-summary { align-content: start; }
 .custom-link { color: var(--primary-strong); font-weight: 600; width: max-content; }
@@ -271,20 +672,97 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
 .inspector-tabs button[aria-pressed='true'] {
   border-color: var(--primary);
   color: var(--primary);
+  background: var(--primary-soft);
 }
 
+.workspace-statusbar {
+  min-height: 32px;
+  display: grid;
+  grid-template-columns: minmax(280px, 0.9fr) minmax(420px, 1.2fr) minmax(260px, 0.9fr);
+  align-items: center;
+  gap: 14px;
+  border-top: 1px solid var(--statusbar-border);
+  background: var(--statusbar);
+  color: rgba(255, 255, 255, 0.82);
+  padding: 0 14px;
+  font-size: 0.75rem;
+}
+
+.statusbar-user,
+.statusbar-tasks,
+.statusbar-system {
+  min-width: 0;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.statusbar-tasks { justify-content: center; color: rgba(255, 255, 255, 0.86); }
+.statusbar-system { justify-content: end; color: rgba(255, 255, 255, 0.72); }
+
+.user-avatar {
+  width: 24px;
+  height: 24px;
+  display: grid;
+  place-items: center;
+  border-radius: 999px;
+  background: var(--primary);
+  color: white;
+  font-size: 0.6875rem;
+  font-weight: 700;
+}
+
+.user-meta {
+  min-width: 0;
+  display: grid;
+  line-height: 1.05;
+}
+
+.user-meta strong {
+  max-width: 160px;
+  overflow: hidden;
+  color: white;
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.user-meta small { color: #7be188; font-size: 0.6875rem; }
+
+.workspace-statusbar button {
+  height: 24px;
+  border: 0;
+  border-radius: 4px;
+  background: transparent;
+  color: rgba(255, 255, 255, 0.78);
+  padding: 0 6px;
+}
+
+.workspace-statusbar button:hover { background: rgba(255, 255, 255, 0.1); }
+
 @media (max-width: 920px) {
+  .login-panel {
+    grid-template-columns: 1fr;
+  }
+
+  .login-brand-panel,
+  .server-login {
+    border-right: 0;
+    border-bottom: 1px solid var(--border);
+  }
+
   .workspace-topbar {
     grid-template-columns: minmax(0, 1fr) auto;
     height: auto;
     padding: 12px;
   }
 
-  .search-box { grid-column: 1 / -1; grid-row: 2; }
+  .search-box { grid-column: 1 / -1; grid-row: 2; max-width: none; }
   .topbar-actions { grid-column: 2; grid-row: 1; }
 
   .workbench-shell {
-    grid-template-rows: auto 1fr;
+    grid-template-rows: auto 1fr auto;
   }
 
   .workbench-body {
@@ -302,19 +780,17 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   .project-rail {
     grid-template-columns: none;
     grid-auto-flow: column;
-    grid-auto-columns: 48px;
+    grid-auto-columns: 56px;
     align-items: center;
-    max-height: 76px;
+    max-height: 84px;
     overflow-x: auto;
     overflow-y: hidden;
     padding: 10px 12px;
   }
 
-  .project-rail button { min-width: 48px; min-height: 48px; }
-
   .channel-sidebar {
     align-content: start;
-    max-height: 220px;
+    max-height: 230px;
     padding: 12px;
   }
 
@@ -329,7 +805,6 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
     padding-bottom: 2px;
   }
 
-  .channel-group button { min-width: 160px; }
   .channel-group {
     grid-auto-flow: row;
     grid-auto-columns: auto;
@@ -354,4 +829,16 @@ button:disabled { cursor: not-allowed; opacity: 0.55; }
   .channel-stage { max-height: 36vh; overflow: auto; }
   .object-inspector { max-height: 288px; overflow: auto; }
   .session-layout { grid-template-columns: 1fr; }
+
+  .workspace-statusbar {
+    grid-template-columns: 1fr;
+    gap: 6px;
+    padding: 8px 12px;
+  }
+
+  .statusbar-tasks,
+  .statusbar-system {
+    justify-content: start;
+    flex-wrap: wrap;
+  }
 }
diff --git a/design-qa.md b/design-qa.md
new file mode 100644
index 0000000..5574c2e
--- /dev/null
+++ b/design-qa.md
@@ -0,0 +1,37 @@
+**Source Visual Truth**
+- Source: `C:\Users\david\.codex\generated_images\019f7b30-8171-7f12-8ef6-ac2571bdf8ae\call_g6DhOvUFyNza9HnLRRBIwk5l.png`
+
+**Implementation Evidence**
+- Login screenshot: `D:\work\senlinai\agent\apps\web\test-results\login-acro.png`
+- Light workbench screenshot: `D:\work\senlinai\agent\apps\web\test-results\workbench-light-acro.png`
+- Dark workbench screenshot: `D:\work\senlinai\agent\apps\web\test-results\workbench-dark-acro.png`
+- Full-view comparison: `D:\work\senlinai\agent\design-qa-comparison.png`
+- Viewport: 1440 x 1024
+- State: login page, authenticated overview page, dark-mode overview page
+
+**Findings**
+- No actionable P0/P1/P2 findings remain.
+
+**Required Fidelity Surfaces**
+- Fonts and typography: implementation uses the existing system UI stack and compact product sizing. Hierarchy matches the design intent for form labels, topbar controls, sidebar rows, overview sections, and inspector tabs.
+- Spacing and layout rhythm: the app preserves the selected layout structure: topbar, project rail, channel sidebar, central overview, right inspector, and full-width bottom status bar. The status bar measured 32px high, matching the requested compact state.
+- Colors and visual tokens: implementation uses an Arco-inspired palette with `#165DFF`, light blue selected surfaces, `#E5E6EB` borders, `#F7F8FA` background, and a darker blue-gray status bar. Dark mode uses VS Code-like workbench tokens and `#007acc` accent/status color.
+- Image quality and asset fidelity: the design relies on app chrome, badges, and simple brand marks rather than content imagery. The implementation uses lightweight code-native marks for the MVP shell; replacing them with a formal icon library or brand asset would be a P3 polish pass.
+- Copy and content: login follows the selected Chinese private-deployment structure. The workbench preserves existing English mock object names where current tests and prototype data already depend on them, while key UI refinements from the final design are present.
+
+**Interaction Checks**
+- Login flow from server/account/password to workbench was exercised.
+- Theme toggle was exercised from light to dark.
+- Console errors checked: none.
+- Layout check: no horizontal overflow at 1440 x 1024.
+
+**Comparison History**
+- Earlier finding: overview center area only showed metric cards, leaving a large blank region compared with the selected design.
+- Fix made: added Inbox, active task, AI session, and recent notes/materials overview sections with compact row separators.
+- Post-fix evidence: `D:\work\senlinai\agent\apps\web\test-results\workbench-light-acro.png` and `D:\work\senlinai\agent\design-qa-comparison.png`.
+
+**Follow-up Polish**
+- Replace code-native icon glyphs with a dedicated Svelte-compatible icon set or approved brand/icon assets.
+- Translate remaining prototype mock data to Chinese if the product direction requires a fully localized MVP.
+
+final result: passed