diff --git a/src/App.tsx b/src/App.tsx
index b0381ab..ae2babe 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useRef, useState } from 'react'
 import { auth } from './auth'
 import { store, useStore } from './store'
-import { ProjectNav } from './components/ProjectNav'
+import { TaskSidebar } from './components/TaskSidebar'
 import { Conversation } from './components/Conversation'
 import { Workbench } from './components/Workbench'
 import { Workspaces, workspaceShortcuts } from './components/Workspaces'
@@ -113,15 +113,18 @@ export function App() {
       {!ui.leftCollapsed ? (
         <>
           <div className="left-nav" style={{ width: ui.leftWidth }}>
-            <ProjectNav />
+            <TaskSidebar />
           </div>
           <div className="divider" onMouseDown={onDividerDown('left')} onDoubleClick={store.toggleLeft} title="拖动调整宽度；继续向左超过最小宽度后松开可收起；双击切换" />
         </>
       ) : (
         <div className="left-nav collapsed" style={{ width: 52 }}>
           <div className="icon-only">
-            <button title="展开侧栏" onClick={store.toggleLeft}>☰</button>
-            <button title="新会话" onClick={() => store.createConversation()}>✚</button>
+            <button title="展开侧栏（⌘B）" onClick={store.toggleLeft}>☰</button>
+            <button title="新建任务（⌘N）" onClick={() => store.createTask()}>✚</button>
+            <button title="收件箱" onClick={() => store.openInbox()}>◍
+              {pendingBadge > 0 && <span className="rail-badge" data-testid="rail-badge">{pendingBadge}</span>}
+            </button>
             <button title="设置" onClick={() => store.openSettings(true)}>⚙</button>
           </div>
         </div>
diff --git a/src/api.ts b/src/api.ts
index a1c3189..2ac22d5 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -24,6 +24,10 @@ export const api = {
   deleteProject: (id: string) => auth.fetch(`${BASE}/api/projects/${id}`, { method: 'DELETE' }),
 
   listConversations: (projectId: string) => auth.fetch(`${BASE}/api/projects/${projectId}/conversations`).then(r => json<Conversation[]>(r)),
+  // 跨项目任务列表（方案 A 侧栏）：默认仅未归档；includeArchived 含归档。
+  listTasks: (includeArchived?: boolean) => auth.fetch(`${BASE}/api/conversations${includeArchived ? '?archived=1' : ''}`).then(r => json<Conversation[]>(r)),
+  setConversationFlags: (id: string, flags: { pinned?: boolean; archived?: boolean }) => auth.fetch(`${BASE}/api/conversations/${id}`, { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(flags) }).then(r => { if (!r.ok) throw new Error(`${r.status}: ${r.statusText}`) }),
+  me: () => auth.fetch(`${BASE}/api/me`).then(r => json<{ owner: string; name: string; auth: boolean }>(r)),
   createConversation: (projectId: string, title?: string) => auth.fetch(`${BASE}/api/projects/${projectId}/conversations`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ title: title ?? '' }) }).then(r => json<Conversation>(r)),
   deleteConversation: (id: string) => auth.fetch(`${BASE}/api/conversations/${id}`, { method: 'DELETE' }),
   setConversationProfile: (id: string, profileId: string) => auth.fetch(`${BASE}/api/conversations/${id}`, { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ profileId }) }).then(r => json<Conversation>(r)),
diff --git a/src/auth.ts b/src/auth.ts
index af2f88e..cbfe5e8 100644
--- a/src/auth.ts
+++ b/src/auth.ts
@@ -30,6 +30,11 @@ export const auth = {
     headers.set('Authorization', `Bearer ${key}`)
     return fetch(input, { ...init, headers })
   },
+  // 退出登录：清凭证并整页回登录门（服务端会话/密钥均为无状态凭证，无需服务端注销）。
+  logout() {
+    this.clear()
+    try { location.reload() } catch { /* 非 DOM 环境（测试）忽略 */ }
+  },
   // 无法带头的资源 URL（EventSource / <img> / 下载）：追加 ?key=。
   withKey(url: string): string {
     const key = this.apiKey()
diff --git a/src/components/Conversation.tsx b/src/components/Conversation.tsx
index 42511a2..8b25a26 100644
--- a/src/components/Conversation.tsx
+++ b/src/components/Conversation.tsx
@@ -213,7 +213,7 @@ function CommandMenu({ text, onPick }: { text: string; onPick: (cmd: string) =>
 
 export function Conversation() {
   const currentConvId = useStore(s => s.currentConvId)
-  const conversation = useStore(s => s.conversations.find(c => c.id === s.currentConvId))
+  const conversation = useStore(s => s.tasks.find(c => c.id === s.currentConvId))
   const messages = useStore(s => s.messages)
   const activeHitl = useStore(s => s.activeHitl)
   const live = useStore(s => s.live)
diff --git a/src/components/ProjectNav.tsx b/src/components/ProjectNav.tsx
deleted file mode 100644
index 9bd04c9..0000000
--- a/src/components/ProjectNav.tsx
+++ /dev/null
@@ -1,74 +0,0 @@
-// 左栏：项目折叠组 → 会话列表；底部账户/设置入口（4.4）。
-import { useEffect, useState } from 'react'
-import { store, useStore } from '../store'
-import { workspaceEntries } from './Workspaces'
-
-export function ProjectNav() {
-  const projects = useStore(s => s.projects)
-  const currentProjectId = useStore(s => s.currentProjectId)
-  const conversations = useStore(s => s.conversations)
-  const currentConvId = useStore(s => s.currentConvId)
-  const [collapsedProjects, setCollapsedProjects] = useState<Record<string, boolean>>({})
-  const [creating, setCreating] = useState(false)
-  const [newName, setNewName] = useState('')
-
-  useEffect(() => { setNewName(`项目 ${projects.length + 1}`) }, [projects.length])
-
-  return (
-    <>
-      <div className="nav-header">
-        <span className="nav-label">Agent-System</span>
-        <button title="新建项目" onClick={() => setCreating(v => !v)}>✚</button>
-      </div>
-      <div className="ws-quick">
-        <div className="nav-label">工作区</div>
-        <div className="ws-quick-list">
-          {workspaceEntries().map(e => (
-            <button key={e.key} className="ws-quick-item" title={`${e.title}（${e.shortcut}）`}
-              onClick={() => store.openWorkspace(e.key)}>
-              <span>{e.icon}</span><span className="name">{e.title}</span><span className="sc">{e.shortcut}</span>
-            </button>
-          ))}
-        </div>
-      </div>
-      {creating && (
-        <div style={{ padding: '0 10px 8px', display: 'flex', gap: 6 }}>
-          <input className="search-input" value={newName} onChange={e => setNewName(e.target.value)}
-            onKeyDown={async e => {
-              if (e.key === 'Enter' && newName.trim()) { await store.createProject(newName.trim()); setCreating(false) }
-            }} placeholder="项目名称" autoFocus />
-          <button className="btn" onClick={async () => { if (newName.trim()) { await store.createProject(newName.trim()); setCreating(false) } }}>建</button>
-        </div>
-      )}
-      <div className="nav-scroll">
-        {projects.length === 0 && <div style={{ padding: 12, color: 'var(--text-faint)', fontSize: 12.5 }}>尚无项目——点击 ✚ 创建</div>}
-        {projects.map(p => {
-          const open = !collapsedProjects[p.id]
-          return (
-            <div className="nav-project" key={p.id}>
-              <div className={`nav-project-name ${open ? 'open' : ''} ${p.id === currentProjectId ? '' : ''}`}
-                style={p.id === currentProjectId ? { color: 'var(--text)' } : undefined}
-                onClick={async () => {
-                  setCollapsedProjects(c => ({ ...c, [p.id]: !(c[p.id] ?? p.id === currentProjectId ? false : true) }))
-                  await store.openProject(p.id)
-                }}>
-                <span className="chev">▶</span>
-                <span style={{ flex: 1, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{p.name}</span>
-              </div>
-              {open && p.id === currentProjectId && conversations.map(c => (
-                <div key={c.id} className={`nav-conv ${c.id === currentConvId ? 'active' : ''}`}
-                  onClick={() => store.openConversation(c.id)} title={c.title}>
-                  {c.title}
-                </div>
-              ))}
-            </div>
-          )
-        })}
-      </div>
-      <div className="nav-footer">
-        <button className="nav-label" onClick={() => store.createConversation()}>＋ 新会话</button>
-        <button className="nav-label" onClick={() => store.openSettings(true)}>⚙ 设置</button>
-      </div>
-    </>
-  )
-}
diff --git a/src/components/TaskSidebar.tsx b/src/components/TaskSidebar.tsx
new file mode 100644
index 0000000..961364e
--- /dev/null
+++ b/src/components/TaskSidebar.tsx
@@ -0,0 +1,242 @@
+// 左栏（方案 A「任务中心」，提案 2026-09-30 R1）：单一主创建入口（P6）+
+// 组织视图（P8：按项目/时间线）+ 置顶/归档 + 账户区（P7）。
+// 工作区快捷图标条保留（D25：⌘ 与左栏共享同一清单）。
+import { useEffect, useRef, useState } from 'react'
+import { store, useStore } from '../store'
+import { auth } from '../auth'
+import type { Conversation } from '../contracts'
+import { workspaceEntries } from './Workspaces'
+import { groupByProject, groupByTimeline, relativeTime, filterTasks, type TaskOrg } from '../tasklist'
+
+const GROUPS_KEY = 'as.taskGroups'
+
+function loadCollapsed(): Record<string, boolean> {
+  try { return JSON.parse(localStorage.getItem(GROUPS_KEY) ?? '{}') } catch { return {} }
+}
+
+/** 小型弹出菜单：锚点下方渲染，点击外部关闭。 */
+function Menu({ anchor, onClose, children }: { anchor: HTMLElement | null; onClose: () => void; children: React.ReactNode }) {
+  const ref = useRef<HTMLDivElement>(null)
+  useEffect(() => {
+    if (!anchor || !ref.current) return
+    const r = anchor.getBoundingClientRect()
+    const el = ref.current
+    let x = r.left, y = r.bottom + 6
+    if (x + el.offsetWidth > window.innerWidth - 8) x = window.innerWidth - el.offsetWidth - 8
+    if (y + el.offsetHeight > window.innerHeight - 8) y = r.top - el.offsetHeight - 6
+    el.style.left = `${Math.max(8, x)}px`
+    el.style.top = `${y}px`
+    const h = (e: MouseEvent) => { if (!el.contains(e.target as Node)) onClose() }
+    window.addEventListener('mousedown', h)
+    return () => window.removeEventListener('mousedown', h)
+  }, [anchor])
+  if (!anchor) return null
+  return <div ref={ref} className="tsb-menu" onClick={e => e.stopPropagation()}>{children}</div>
+}
+
+function MenuItem({ onClick, danger, children }: { onClick: () => void; danger?: boolean; children: React.ReactNode }) {
+  return <button className={`tsb-mi ${danger ? 'danger' : ''}`} onClick={onClick}>{children}</button>
+}
+
+export function TaskSidebar() {
+  const projects = useStore(s => s.projects)
+  const tasks = useStore(s => s.tasks)
+  const me = useStore(s => s.me)
+  const currentConvId = useStore(s => s.currentConvId)
+  const currentProjectId = useStore(s => s.currentProjectId)
+  const org = useStore(s => s.ui.taskOrg)
+  const showArchived = useStore(s => s.ui.showArchived)
+  const theme = useStore(s => s.ui.theme)
+  const pendingBadge = useStore(s => s.cards.filter(c => c.status === 'action_required').length)
+
+  const [q, setQ] = useState('')
+  const [collapsed, setCollapsed] = useState<Record<string, boolean>>(loadCollapsed)
+  const [menu, setMenu] = useState<{ kind: 'new' | 'filter' | 'account' | `row:${string}`; anchor: HTMLElement } | null>(null)
+  const [creatingProject, setCreatingProject] = useState(false)
+  const [newProjectName, setNewProjectName] = useState('')
+
+  // ⌘N/Ctrl+N 新建任务（P6：创建入口唯一 + 快捷键）。
+  useEffect(() => {
+    const h = (e: KeyboardEvent) => {
+      const k = e.key.toLowerCase()
+      if ((e.metaKey || e.ctrlKey) && k === 'n') { e.preventDefault(); store.createTask() }
+      if ((e.metaKey || e.ctrlKey) && k === 'b') { e.preventDefault(); store.toggleLeft() }
+    }
+    window.addEventListener('keydown', h, true)
+    return () => window.removeEventListener('keydown', h, true)
+  }, [])
+
+  const tglGroup = (key: string) => {
+    setCollapsed(c => {
+      const next = { ...c, [key]: !c[key] }
+      try { localStorage.setItem(GROUPS_KEY, JSON.stringify(next)) } catch { /* ignore */ }
+      return next
+    })
+  }
+  const setOrg = (o: TaskOrg) => store.setUI({ taskOrg: o })
+
+  const visible = filterTasks(tasks, q)
+  const pinned = visible.filter(t => t.pinned)
+  const rest = visible.filter(t => !t.pinned)
+  const groups = org === 'project' ? groupByProject(rest, projects) : groupByTimeline(rest)
+  const currentProject = projects.find(p => p.id === currentProjectId)
+  const rowTask = menu?.kind.startsWith('row:') ? tasks.find(t => t.id === menu.kind.slice(4)) : null
+  const rowMenuAnchor = menu && menu.kind.startsWith('row:') ? menu.anchor : null
+
+  const rowActions = (t: Conversation) => (
+    <span className="tsb-row-acts">
+      <button className="tsb-row-act" title="置顶 / 取消置顶" onClick={e => { e.stopPropagation(); store.pinTask(t.id, !t.pinned) }}>📌</button>
+      <button className="tsb-row-act" title={t.archived ? '恢复' : '归档'} onClick={e => { e.stopPropagation(); store.archiveTask(t.id, !t.archived) }}>
+        {t.archived ? '↩' : '🗄'}
+      </button>
+    </span>
+  )
+
+  const taskRow = (t: Conversation, badge?: string) => (
+    <div key={t.id} className={`tsb-task ${t.id === currentConvId ? 'active' : ''} ${t.archived ? 'archived' : ''}`}
+      onClick={() => store.openTask(t.id)}
+      onContextMenu={e => { e.preventDefault(); setMenu({ kind: `row:${t.id}`, anchor: e.currentTarget as HTMLElement }) }}>
+      <span className="tsb-task-t" title={t.title}>{t.title || '未命名任务'}</span>
+      {badge && <span className="tsb-pbadge">{badge}</span>}
+      <span className="tsb-task-tm">{relativeTime(t.updatedAt)}</span>
+      {rowActions(t)}
+    </div>
+  )
+
+  return (
+    <>
+      <div className="tsb-brand">
+        <span className="tsb-logo">A</span>
+        <span className="tsb-name">Agent-System</span>
+        <span style={{ flex: 1 }} />
+        <button className="tsb-iconbtn" title="收起侧栏（⌘B）" onClick={store.toggleLeft}>⇤</button>
+      </div>
+
+      {/* 单一主创建入口（P6）：新建任务 + 次级菜单（新建项目/指定项目新建） */}
+      <div className="tsb-actions">
+        <div className="tsb-newtask">
+          <button className="tsb-newtask-main" title="在当前项目新建任务（⌘N）" onClick={() => store.createTask()}>
+            ＋ 新建任务{currentProject ? <span className="tsb-newtask-proj">{currentProject.name}</span> : null}
+          </button>
+          <button className="tsb-newtask-caret" title="更多创建选项"
+            onClick={e => setMenu(m => m?.kind === 'new' ? null : { kind: 'new', anchor: e.currentTarget })}>▾</button>
+        </div>
+        <input className="tsb-search" placeholder="搜索任务…" value={q} onChange={e => setQ(e.target.value)} />
+      </div>
+
+      {/* 组织视图切换（P8）+ 过滤 */}
+      <div className="tsb-orgrow">
+        <div className="tsb-pills">
+          <button className={`tsb-pill ${org === 'project' ? 'on' : ''}`} onClick={() => setOrg('project')}>按项目</button>
+          <button className={`tsb-pill ${org === 'timeline' ? 'on' : ''}`} onClick={() => setOrg('timeline')}>时间线</button>
+        </div>
+        <button className={`tsb-iconbtn ${showArchived ? 'active' : ''}`} title={showArchived ? '隐藏归档' : '查看归档'}
+          onClick={() => { store.setUI({ showArchived: !showArchived }); store.refreshTasks(!showArchived) }}>🗄</button>
+      </div>
+
+      <div className="tsb-scroll">
+        {creatingProject && (
+          <div className="tsb-newproject">
+            <input className="tsb-search" autoFocus value={newProjectName}
+              onChange={e => setNewProjectName(e.target.value)}
+              onKeyDown={async e => {
+                if (e.key === 'Enter' && newProjectName.trim()) {
+                  await store.createProject(newProjectName.trim())
+                  setCreatingProject(false); setNewProjectName('')
+                }
+                if (e.key === 'Escape') setCreatingProject(false)
+              }}
+              placeholder="项目名称，回车创建" />
+          </div>
+        )}
+
+        {pinned.length > 0 && (
+          <>
+            <div className="tsb-seclabel">置顶</div>
+            {pinned.map(t => taskRow(t, org === 'timeline' ? projects.find(p => p.id === t.projectId)?.name : undefined))}
+          </>
+        )}
+
+        {groups.length === 0 && pinned.length === 0 && (
+          <div className="tsb-empty">尚无任务——点击「新建任务」开始<br />（项目内素材上传、检索与生成全程可在对话中完成）</div>
+        )}
+
+        {groups.map(g => (
+          <div key={g.key} className={`tsb-group ${collapsed[g.key] ? 'closed' : ''}`}>
+            {org === 'project' ? (
+              <div className="tsb-group-head" onClick={() => tglGroup(g.key)}>
+                <span className="tsb-chev">▶</span>
+                <span className="tsb-group-name" title={g.label}>{g.label}</span>
+                <span className="tsb-group-cnt">{g.tasks.length}</span>
+                <span style={{ flex: 1 }} />
+                <button className="tsb-group-add" title="在此项目新建任务" onClick={e => { e.stopPropagation(); store.createTask(g.projectId) }}>＋</button>
+              </div>
+            ) : (
+              <div className="tsb-seclabel">{g.label}</div>
+            )}
+            {!collapsed[g.key] && g.tasks.map(t => taskRow(t, org === 'timeline' ? projects.find(p => p.id === t.projectId)?.name : undefined))}
+          </div>
+        ))}
+      </div>
+
+      {/* 工作区快捷图标条（D25：与 ⌘1–9 同一清单） */}
+      <div className="tsb-wsstrip">
+        {workspaceEntries().map(e => (
+          <button key={e.key} title={`${e.title}（${e.shortcut}）`} onClick={() => store.openWorkspace(e.key)}>{e.icon}</button>
+        ))}
+        <span style={{ flex: 1 }} />
+        <button title={theme === 'dark' ? '切换浅色' : '切换深色'} onClick={() => store.setUI({ theme: theme === 'dark' ? 'light' : 'dark' })}>{theme === 'dark' ? '☀' : '☾'}</button>
+      </div>
+
+      {/* 账户区（P7）：身份常驻；阶段 1 = API key 即身份（user 即租户 owner） */}
+      <div className="tsb-footer">
+        <button className="tsb-user" onClick={e => setMenu(m => m?.kind === 'account' ? null : { kind: 'account', anchor: e.currentTarget })}>
+          <span className="tsb-avatar">{(me?.name || me?.owner || '?').slice(0, 1).toUpperCase()}</span>
+          <span className="tsb-user-info">
+            <span className="tsb-user-name">{me?.name || me?.owner || '未连接'}</span>
+            <span className="tsb-user-sub">{me ? (me.auth ? 'API 密钥 · 已认证' : '本地模式 · 默认租户') : '…'}</span>
+          </span>
+          <span className="tsb-user-chev">▿</span>
+        </button>
+        <button className="tsb-iconbtn" title="设置" onClick={() => store.openSettings(true)}>⚙</button>
+        {pendingBadge > 0 && <button className="tsb-iconbtn active" title={`待办 ${pendingBadge}`} onClick={() => store.openInbox()}>◍ {pendingBadge}</button>}
+      </div>
+
+      {/* 弹出菜单们 */}
+      <Menu anchor={menu?.kind === 'new' ? menu.anchor : null} onClose={() => setMenu(null)}>
+        <MenuItem onClick={() => { store.createTask(); setMenu(null) }}>新建任务 · 当前项目<kbd>⌘N</kbd></MenuItem>
+        <div className="tsb-menu-div" />
+        <MenuItem onClick={() => { setCreatingProject(true); setMenu(null) }}>新建项目…</MenuItem>
+        {projects.filter(p => p.id !== currentProjectId).slice(0, 6).map(p => (
+          <MenuItem key={p.id} onClick={() => { store.createTask(p.id); setMenu(null) }}>在「{p.name}」新建任务</MenuItem>
+        ))}
+      </Menu>
+
+      <Menu anchor={rowMenuAnchor} onClose={() => setMenu(null)}>
+        {rowTask && <>
+          <MenuItem onClick={() => { store.pinTask(rowTask.id, !rowTask.pinned); setMenu(null) }}>{rowTask.pinned ? '取消置顶' : '置顶'}</MenuItem>
+          <MenuItem onClick={() => { store.archiveTask(rowTask.id, !rowTask.archived); setMenu(null) }}>{rowTask.archived ? '恢复（移出归档）' : '归档'}</MenuItem>
+          <div className="tsb-menu-div" />
+          <MenuItem onClick={() => { store.setUI({ taskOrg: 'timeline' }); setMenu(null) }}>按时间线查看</MenuItem>
+        </>}
+      </Menu>
+
+      <Menu anchor={menu?.kind === 'account' ? menu.anchor : null} onClose={() => setMenu(null)}>
+        <div className="tsb-acc-head">
+          <span className="tsb-avatar">{(me?.name || me?.owner || '?').slice(0, 1).toUpperCase()}</span>
+          <span>
+            <div className="tsb-acc-name">{me?.name || '未连接'}</div>
+            <div className="tsb-acc-mail">{me?.owner ? `租户：${me.owner}` : '—'}</div>
+          </span>
+        </div>
+        <div className="tsb-menu-div" />
+        <MenuItem onClick={() => { store.openSettings(true); setMenu(null) }}>偏好设置</MenuItem>
+        <MenuItem onClick={() => { store.openInbox(); setMenu(null) }}>收件箱{pendingBadge > 0 ? `（待办 ${pendingBadge}）` : ''}</MenuItem>
+        {me?.auth && <>
+          <div className="tsb-menu-div" />
+          <MenuItem danger onClick={() => { auth.logout() }}>退出登录</MenuItem>
+        </>}
+      </Menu>
+    </>
+  )
+}
diff --git a/src/contracts.ts b/src/contracts.ts
index fe3a488..7c45ebf 100644
--- a/src/contracts.ts
+++ b/src/contracts.ts
@@ -14,6 +14,7 @@ export interface Project {
 
 export interface Conversation {
   id: ID; projectId: ID; owner?: ID; title: string; profileId?: ID;
+  pinned?: boolean; archived?: boolean;
   createdAt: string; updatedAt: string;
 }
 
diff --git a/src/store.ts b/src/store.ts
index 48cda25..4aa31d1 100644
--- a/src/store.ts
+++ b/src/store.ts
@@ -35,13 +35,19 @@ export interface UIState {
   trackerRunId: string | null
   viewingArtifact: Artifact | null
   activeWorkspace: string | null
+  taskOrg: 'project' | 'timeline'
+  showArchived: boolean
+  lastProjectId: string | null
 }
 
+export interface Me { owner: string; name: string; auth: boolean }
+
 interface AppState {
   contextObs: Record<string, ContextObs>
   projects: Project[]
   currentProjectId: string | null
-  conversations: Conversation[]
+  tasks: Conversation[]
+  me: Me | null
   currentConvId: string | null
   messages: Message[]
   runs: Run[]
@@ -73,6 +79,9 @@ const DEFAULT_UI: UIState = {
   settingsOpen: false,
   trackerRunId: null,
   viewingArtifact: null,
+  taskOrg: 'project',
+  showArchived: false,
+  lastProjectId: null,
 }
 
 function loadUI(): UIState {
@@ -85,7 +94,7 @@ function loadUI(): UIState {
 
 let state: AppState = {
   contextObs: {},
-  projects: [], currentProjectId: null, conversations: [], currentConvId: null,
+  projects: [], currentProjectId: null, tasks: [], me: null, currentConvId: null,
   messages: [], runs: [], activeHitl: [], lastSeq: 0, live: null,
   plan: null, todos: null, artifacts: [], cards: [], profiles: [], pluginPanels: [],
   serverWorkspaces: [],
@@ -126,12 +135,23 @@ export const store = {
   async refreshProjects() {
     try {
       const projects = await api.listProjects()
-      const current = projects.find(p => p.id === state.currentProjectId) ?? projects[0]
+      const current = projects.find(p => p.id === state.currentProjectId) ?? projects.find(p => p.id === state.ui.lastProjectId) ?? projects[0]
       set({ projects, currentProjectId: current?.id ?? null, error: null })
       if (current) await store.openProject(current.id)
     } catch (e) {
       set({ error: String(e) })
     }
+    store.refreshTasks()
+    store.refreshMe()
+  },
+
+  // 跨项目任务列表（方案 A 侧栏数据源）：归档视图切换时带 includeArchived 重取。
+  async refreshTasks(includeArchived = state.ui.showArchived) {
+    try { set({ tasks: await api.listTasks(includeArchived) }) } catch { /* 列表竞态，静默 */ }
+  },
+
+  async refreshMe() {
+    try { set({ me: await api.me() }) } catch { /* 身份不可用时侧栏只显示通用入口 */ }
   },
 
   async createProject(name: string) {
@@ -142,16 +162,47 @@ export const store = {
   },
 
   async openProject(projectId: string) {
-    const conversations = await api.listConversations(projectId)
-    set({ currentProjectId: projectId, conversations })
+    set({ currentProjectId: projectId })
+    store.setUI({ lastProjectId: projectId })
     await store.refreshArtifacts(projectId)
   },
 
+  /** 新建任务（=会话）：默认当前项目上下文；显式 projectId 用于"新建于指定项目"。 */
+  async createTask(projectId?: string) {
+    const pid = projectId ?? state.currentProjectId
+    if (!pid) { store.toast('请先创建项目'); return }
+    const c = await api.createConversation(pid)
+    await store.refreshTasks()
+    await store.openTask(c.id)
+  },
+
+  /** 兼容旧入口（⌘/命令总线） */
   async createConversation(title?: string) {
-    if (!state.currentProjectId) return
-    const c = await api.createConversation(state.currentProjectId, title)
-    await store.openProject(state.currentProjectId)
-    await store.openConversation(c.id)
+    if (title) store.toast('已在当前项目创建任务')
+    await store.createTask()
+  },
+
+  /** 打开任务：跨项目点击时切换项目上下文（工件/上传归属正确）。 */
+  async openTask(convId: string) {
+    const t = state.tasks.find(x => x.id === convId)
+    if (t && t.projectId !== state.currentProjectId) await store.openProject(t.projectId)
+    await store.openConversation(convId)
+  },
+
+  async pinTask(convId: string, pinned: boolean) {
+    const tasks = state.tasks.map(t => t.id === convId ? { ...t, pinned } : t)
+    set({ tasks })
+    try { await api.setConversationFlags(convId, { pinned }) } catch (e) { store.toast(`置顶失败：${e}`); store.refreshTasks() }
+  },
+
+  async archiveTask(convId: string, archived: boolean) {
+    const tasks = state.tasks.map(t => t.id === convId ? { ...t, archived } : t)
+    set({ tasks })
+    try {
+      await api.setConversationFlags(convId, { archived })
+      if (state.currentConvId === convId && archived) store.toast('任务已归档')
+    } catch (e) { store.toast(`归档失败：${e}`) }
+    store.refreshTasks()
   },
 
   async openConversation(convId: string) {
@@ -178,6 +229,7 @@ export const store = {
       const [plan, todos] = await Promise.all([api.getPlan(d.conversation.id), api.getTodos(d.conversation.id)])
       set({ plan, todos })
       store.refreshCards(d.conversation.id)
+      store.refreshTasks()
     } catch (e) {
       set({ error: String(e) })
     }
diff --git a/src/styles.css b/src/styles.css
index 00571b9..9b91458 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -17,27 +17,7 @@ button { font-family: inherit; }
 .right-panel { background: var(--bg-panel); border-left: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; min-width: 0; }
 .right-panel.collapsed { width: 44px !important; }
 
-/* ---- 左栏 ---- */
-.nav-header { padding: 14px 14px 8px; font-weight: 600; display: flex; align-items: center; justify-content: space-between; }
-.nav-header button { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 16px; padding: 4px; border-radius: var(--radius-sm); }
-.nav-header button:hover { background: var(--bg-hover); color: var(--text); }
-.nav-scroll { flex: 1; overflow-y: auto; padding: 4px 8px 8px; }
-.nav-project { margin-bottom: 4px; }
-.nav-project-name { display: flex; align-items: center; gap: 6px; padding: 6px 8px; border-radius: var(--radius-sm); color: var(--text-dim); font-weight: 500; cursor: pointer; user-select: none; }
-.nav-project-name:hover { background: var(--bg-hover); }
-.nav-project-name .chev { font-size: 10px; transition: transform .12s; }
-.nav-project-name.open .chev { transform: rotate(90deg); }
-.nav-conv { padding: 5px 8px 5px 26px; border-radius: var(--radius-sm); color: var(--text-dim); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
-.nav-conv:hover { background: var(--bg-hover); color: var(--text); }
-.nav-conv.active { background: var(--accent-soft); color: var(--accent); }
-.nav-footer { border-top: 1px solid var(--border); padding: 8px; display: flex; gap: 6px; }
-.nav-footer button { flex: 1; background: none; border: none; color: var(--text-dim); padding: 7px; border-radius: var(--radius-sm); cursor: pointer; font-size: 12px; }
-.nav-footer button:hover { background: var(--bg-hover); color: var(--text); }
-.left-nav.collapsed .nav-label { display: none; }
-.icon-only { display: flex; flex-direction: column; align-items: center; gap: 10px; padding-top: 10px; }
-.icon-only button { background: none; border: none; color: var(--text-dim); font-size: 16px; cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
-.icon-only button:hover { background: var(--bg-hover); color: var(--text); }
-
+/* ---- 左栏：任务中心（方案 A）见文末 tsb-* ---- */
 /* ---- 中栏对话 ---- */
 /* min-height:0 须随列向 flex 链下传（.main→.chat→.chat-body）：flex 项的自动最小
    高度是内容高度，缺失时消息会撑破 .chat——chat-body 永不滚动、输入栏被顶出视口。 */
@@ -205,11 +185,6 @@ button { font-family: inherit; }
 .login-err { margin-top: 10px; font-size: 12px; color: #f87171; }
 
 /* 工作区快捷区（T4/D26 左栏）与当前任务常驻卡（D25 R4） */
-.ws-quick{padding:6px 8px 8px;border-bottom:1px solid var(--border)}
-.ws-quick-list{display:flex;flex-direction:column;gap:2px;margin-top:4px}
-.ws-quick-item{display:flex;align-items:center;gap:8px;padding:4px 8px;border:none;background:transparent;color:inherit;cursor:pointer;border-radius:6px;text-align:left;font-size:12px}
-.ws-quick-item:hover{background:rgba(120,160,255,.12)}
-.ws-quick-item .sc{margin-left:auto;font-size:10px;color:var(--text-faint);border:1px solid var(--border);border-radius:3px;padding:0 4px}
 .current-task{border:1px solid var(--border);border-radius:8px;padding:8px 10px;margin-bottom:8px;background:rgba(120,160,255,.05)}
 .ct-head{display:flex;align-items:center;gap:8px;font-weight:600;margin-bottom:6px}
 .ct-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@@ -222,3 +197,81 @@ button { font-family: inherit; }
 .rail-badge{position:absolute;top:-4px;right:-6px;font-size:10px;background:var(--warn,#d29922);color:#fff;border-radius:8px;padding:0 5px;min-width:14px}
 .right-panel.collapsed .icon-only button{position:relative}
 .tab-action{font-size:11px;color:var(--text-faint)}
+
+/* ---- 左栏：任务中心（方案 A，提案 2026-09-30） ---- */
+.tsb-brand { display: flex; align-items: center; gap: 8px; padding: 12px 12px 6px; }
+.tsb-logo { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex: none; }
+.tsb-name { font-weight: 600; font-size: 13.5px; }
+.tsb-iconbtn { width: 26px; height: 26px; border-radius: var(--radius-sm); background: none; border: none; color: var(--text-faint); cursor: pointer; font-size: 13px; display: inline-flex; align-items: center; justify-content: center; position: relative; }
+.tsb-iconbtn:hover { background: var(--bg-hover); color: var(--text); }
+.tsb-iconbtn.active { color: var(--accent); background: var(--accent-soft); }
+
+.tsb-actions { padding: 4px 10px 8px; display: flex; flex-direction: column; gap: 6px; }
+.tsb-newtask { display: flex; height: 34px; border-radius: var(--radius-sm); border: 1px solid var(--accent); background: var(--accent-soft); overflow: hidden; }
+.tsb-newtask-main { flex: 1; display: flex; align-items: center; gap: 6px; padding: 0 10px; background: none; border: none; color: var(--accent); font-weight: 600; font-size: 13px; cursor: pointer; min-width: 0; }
+.tsb-newtask-main:hover { filter: brightness(1.08); }
+.tsb-newtask-proj { font-weight: 400; font-size: 11.5px; opacity: .8; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.tsb-newtask-caret { width: 28px; border: none; border-left: 1px solid var(--accent); background: none; color: var(--accent); cursor: pointer; font-size: 10px; }
+.tsb-newtask-caret:hover { background: var(--accent-soft); }
+.tsb-search { height: 30px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-raised); color: var(--text); padding: 0 10px; font-size: 12.5px; width: 100%; }
+.tsb-search:focus { border-color: var(--accent); outline: none; }
+.tsb-search::placeholder { color: var(--text-faint); }
+
+.tsb-orgrow { display: flex; align-items: center; gap: 6px; padding: 0 10px 8px; }
+.tsb-pills { flex: 1; display: flex; background: var(--bg-raised); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 2px; gap: 2px; }
+.tsb-pill { flex: 1; height: 22px; border: none; border-radius: 4px; background: none; color: var(--text-faint); font-size: 12px; cursor: pointer; }
+.tsb-pill:hover { color: var(--text-dim); }
+.tsb-pill.on { background: var(--bg-active); color: var(--text); font-weight: 500; }
+
+.tsb-scroll { flex: 1; overflow-y: auto; padding: 0 8px 8px; min-height: 0; }
+.tsb-seclabel { font-size: 11px; color: var(--text-faint); padding: 10px 8px 4px; letter-spacing: .3px; }
+.tsb-empty { padding: 18px 12px; color: var(--text-faint); font-size: 12.5px; line-height: 1.8; text-align: center; }
+.tsb-newproject { padding: 0 2px 8px; }
+
+.tsb-group { margin-bottom: 2px; }
+.tsb-group-head { display: flex; align-items: center; gap: 6px; height: 30px; padding: 0 6px 0 8px; border-radius: var(--radius-sm); color: var(--text-dim); font-weight: 500; font-size: 13px; cursor: pointer; user-select: none; }
+.tsb-group-head:hover { background: var(--bg-hover); }
+.tsb-group.closed .tsb-chev { transform: rotate(-90deg); }
+.tsb-chev { font-size: 9px; color: var(--text-faint); transition: transform .12s; }
+.tsb-group-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.tsb-group-cnt { font-size: 11px; color: var(--text-faint); font-weight: 400; }
+.tsb-group-add { visibility: hidden; width: 20px; height: 20px; border: none; border-radius: 4px; background: none; color: var(--text-faint); font-size: 12px; cursor: pointer; }
+.tsb-group-head:hover .tsb-group-add { visibility: visible; }
+.tsb-group-add:hover { background: var(--bg-active); color: var(--text); }
+
+.tsb-task { display: flex; align-items: center; gap: 8px; height: 30px; padding: 0 8px; margin: 1px 0; border-radius: var(--radius-sm); color: var(--text-dim); cursor: pointer; }
+.tsb-task:hover { background: var(--bg-hover); color: var(--text); }
+.tsb-task.active { background: var(--bg-active); color: var(--text); }
+.tsb-task.archived .tsb-task-t { text-decoration: line-through; opacity: .6; }
+.tsb-task-t { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
+.tsb-task-tm { font-size: 11px; color: var(--text-faint); font-variant-numeric: tabular-nums; }
+.tsb-pbadge { font-size: 10.5px; color: var(--text-faint); border: 1px solid var(--border); border-radius: 4px; padding: 0 5px; line-height: 1.5; white-space: nowrap; }
+.tsb-row-acts { display: none; gap: 2px; }
+.tsb-task:hover .tsb-row-acts { display: inline-flex; }
+.tsb-task:hover .tsb-task-tm { display: none; }
+.tsb-row-act { border: none; background: none; color: var(--text-faint); font-size: 11px; cursor: pointer; padding: 2px 3px; border-radius: 4px; }
+.tsb-row-act:hover { background: var(--bg-active); color: var(--text); }
+
+.tsb-wsstrip { display: flex; align-items: center; gap: 2px; padding: 6px 10px; border-top: 1px solid var(--border); }
+.tsb-wsstrip button { border: none; background: none; color: var(--text-faint); font-size: 13px; cursor: pointer; padding: 4px 5px; border-radius: var(--radius-sm); }
+.tsb-wsstrip button:hover { background: var(--bg-hover); color: var(--text); }
+
+.tsb-footer { display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-top: 1px solid var(--border); }
+.tsb-user { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; height: 38px; padding: 0 7px; border: none; border-radius: var(--radius-sm); background: none; cursor: pointer; text-align: left; }
+.tsb-user:hover { background: var(--bg-hover); }
+.tsb-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; flex: none; }
+.tsb-user-info { flex: 1; min-width: 0; display: flex; flex-direction: column; }
+.tsb-user-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.tsb-user-sub { font-size: 11px; color: var(--text-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.tsb-user-chev { color: var(--text-faint); font-size: 10px; }
+
+.tsb-menu { position: fixed; z-index: 300; min-width: 210px; background: var(--bg-raised); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 12px 32px rgba(0,0,0,.35); padding: 5px; display: flex; flex-direction: column; }
+.tsb-mi { display: flex; align-items: center; gap: 8px; min-height: 30px; padding: 4px 9px; border: none; border-radius: var(--radius-sm); background: none; color: var(--text-dim); font-size: 13px; cursor: pointer; text-align: left; }
+.tsb-mi:hover { background: var(--bg-hover); color: var(--text); }
+.tsb-mi.danger { color: var(--err); }
+.tsb-mi.danger:hover { background: var(--err); color: #fff; }
+.tsb-mi kbd { margin-left: auto; font-size: 10.5px; color: var(--text-faint); }
+.tsb-menu-div { height: 1px; background: var(--border); margin: 5px 4px; }
+.tsb-acc-head { display: flex; gap: 10px; align-items: center; padding: 8px 9px 6px; }
+.tsb-acc-name { font-size: 13.5px; font-weight: 600; }
+.tsb-acc-mail { font-size: 11.5px; color: var(--text-faint); }
diff --git a/src/tasklist.ts b/src/tasklist.ts
new file mode 100644
index 0000000..e5228bf
--- /dev/null
+++ b/src/tasklist.ts
@@ -0,0 +1,82 @@
+// 任务列表组织（方案 A，提案 2026-09-30）：纯函数，供 TaskSidebar 与测试消费。
+// 组织是本端视图偏好（P8），不改数据模型——数据源恒为跨项目 tasks（updated_at 倒序）。
+import type { Conversation, Project } from './contracts'
+
+export type TaskOrg = 'project' | 'timeline'
+
+export interface TaskGroup {
+  key: string
+  label: string
+  /** 项目分组时携带（组头「在此项目新建」入口与计数）。 */
+  projectId?: string
+  tasks: Conversation[]
+}
+
+/** 按项目分组：项目按服务端序（更新倒序），组内任务按列表序（置顶已在服务端排首）。 */
+export function groupByProject(tasks: Conversation[], projects: Project[]): TaskGroup[] {
+  const byProject = new Map<string, Conversation[]>()
+  for (const t of tasks) {
+    const list = byProject.get(t.projectId) ?? []
+    list.push(t)
+    byProject.set(t.projectId, list)
+  }
+  const groups: TaskGroup[] = []
+  for (const p of projects) {
+    const list = byProject.get(p.id)
+    if (!list || list.length === 0) continue
+    groups.push({ key: `prj:${p.id}`, label: p.name, projectId: p.id, tasks: list })
+    byProject.delete(p.id)
+  }
+  // 项目已删但会话仍在（竞态残留）：收进"未分组"，不静默丢弃。
+  for (const [pid, list] of byProject) {
+    groups.push({ key: `prj:${pid}`, label: '未分组', projectId: pid, tasks: list })
+  }
+  return groups
+}
+
+/** 按时间线分组：今天 / 昨天 / 本周更早 / 更早（按 updatedAt 本地时区）。 */
+export function groupByTimeline(tasks: Conversation[], now = Date.now()): TaskGroup[] {
+  const startOfDay = (ts: number) => { const d = new Date(ts); d.setHours(0, 0, 0, 0); return d.getTime() }
+  const today0 = startOfDay(now)
+  const dayMs = 86_400_000
+  const buckets: TaskGroup[] = [
+    { key: 'today', label: '今天', tasks: [] },
+    { key: 'yesterday', label: '昨天', tasks: [] },
+    { key: 'week', label: '本周更早', tasks: [] },
+    { key: 'older', label: '更早', tasks: [] },
+  ]
+  const weekday = (new Date(now).getDay() + 6) % 7 // 周一=0
+  const weekStart = today0 - weekday * dayMs
+  for (const t of tasks) {
+    const ts = Date.parse(t.updatedAt)
+    if (Number.isNaN(ts)) { buckets[3].tasks.push(t); continue }
+    if (ts >= today0) buckets[0].tasks.push(t)
+    else if (ts >= today0 - dayMs) buckets[1].tasks.push(t)
+    else if (ts >= weekStart) buckets[2].tasks.push(t)
+    else buckets[3].tasks.push(t)
+  }
+  return buckets.filter(g => g.tasks.length > 0)
+}
+
+/** 相对时间（侧栏行尾）：刚刚 / N 分钟 / N 小时 / 昨天 / N 天 / 月-日。 */
+export function relativeTime(iso: string, now = Date.now()): string {
+  const ts = Date.parse(iso)
+  if (Number.isNaN(ts)) return ''
+  const diff = now - ts
+  if (diff < 60_000) return '刚刚'
+  if (diff < 3_600_000) return `${Math.floor(diff / 60_000)} 分钟`
+  if (diff < 86_400_000) return `${Math.floor(diff / 3_600_000)} 小时`
+  if (diff < 172_800_000) return '昨天'
+  if (diff < 7 * 86_400_000) return `${Math.floor(diff / 86_400_000)} 天`
+  const d = new Date(ts)
+  const nowD = new Date(now)
+  const md = `${d.getMonth() + 1}/${d.getDate()}`
+  return d.getFullYear() === nowD.getFullYear() ? md : `${d.getFullYear()}/${md}`
+}
+
+/** 标题过滤（不区分大小写；空串返回原列表）。 */
+export function filterTasks(tasks: Conversation[], q: string): Conversation[] {
+  const needle = q.trim().toLowerCase()
+  if (!needle) return tasks
+  return tasks.filter(t => t.title.toLowerCase().includes(needle))
+}
diff --git a/test/tasklist.test.ts b/test/tasklist.test.ts
new file mode 100644
index 0000000..96f14a8
--- /dev/null
+++ b/test/tasklist.test.ts
@@ -0,0 +1,71 @@
+// 任务列表组织纯函数测试（方案 A R1）。
+import { describe, it, expect } from 'vitest'
+import { groupByProject, groupByTimeline, relativeTime, filterTasks } from '../src/tasklist'
+import type { Conversation, Project } from '../src/contracts'
+
+const NOW = new Date('2026-09-30T15:00:00').getTime()
+const H = 3_600_000
+
+function conv(id: string, projectId: string, updatedAt: string, extra: Partial<Conversation> = {}): Conversation {
+  return { id, projectId, title: id, createdAt: updatedAt, updatedAt, ...extra }
+}
+
+describe('groupByProject', () => {
+  it('groups tasks under projects in project order and never drops orphans', () => {
+    const projects: Project[] = [
+      { id: 'p2', name: '乙', createdAt: '', updatedAt: '' },
+      { id: 'p1', name: '甲', createdAt: '', updatedAt: '' },
+    ]
+    const tasks = [conv('a', 'p1', '2026-09-30T10:00:00Z'), conv('b', 'p2', '2026-09-29T10:00:00Z'), conv('c', 'pX', '2026-09-28T10:00:00Z')]
+    const groups = groupByProject(tasks, projects)
+    expect(groups.map(g => g.label)).toEqual(['乙', '甲', '未分组'])
+    expect(groups[0].projectId).toBe('p2')
+    expect(groups[2].tasks.map(t => t.id)).toEqual(['c'])
+  })
+  it('skips projects with zero visible tasks', () => {
+    const projects: Project[] = [{ id: 'p1', name: '甲', createdAt: '', updatedAt: '' }]
+    expect(groupByProject([], projects)).toEqual([])
+  })
+})
+
+describe('groupByTimeline', () => {
+  it('buckets by local day and week boundaries', () => {
+    // NOW=周三 15:00（本地）；构造今天/昨天/本周更早（周一）/更早 各一条。
+    const tasks = [
+      conv('today', 'p', new Date(NOW - H).toISOString()),
+      conv('yesterday', 'p', new Date(NOW - 26 * H).toISOString()),
+      conv('week', 'p', new Date(NOW - 50 * H).toISOString()),
+      conv('older', 'p', new Date(NOW - 10 * 24 * H).toISOString()),
+    ]
+    const groups = groupByTimeline(tasks, NOW)
+    expect(groups.map(g => g.label)).toEqual(['今天', '昨天', '本周更早', '更早'])
+    expect(groups[0].tasks[0].id).toBe('today')
+  })
+  it('hides empty buckets and tolerates bad timestamps', () => {
+    const groups = groupByTimeline([conv('x', 'p', 'not-a-date')], NOW)
+    expect(groups).toHaveLength(1)
+    expect(groups[0].label).toBe('更早')
+  })
+})
+
+describe('relativeTime', () => {
+  it('formats gradients and year rollover', () => {
+    expect(relativeTime(new Date(NOW - 30_000).toISOString(), NOW)).toBe('刚刚')
+    expect(relativeTime(new Date(NOW - 5 * 60_000).toISOString(), NOW)).toBe('5 分钟')
+    expect(relativeTime(new Date(NOW - 3 * H).toISOString(), NOW)).toBe('3 小时')
+    expect(relativeTime(new Date(NOW - 30 * H).toISOString(), NOW)).toBe('昨天')
+    expect(relativeTime(new Date(NOW - 3 * 24 * H).toISOString(), NOW)).toBe('3 天')
+    expect(relativeTime('2026-05-01T00:00:00', NOW)).toBe('5/1')
+    expect(relativeTime('2025-12-31T00:00:00', NOW)).toBe('2025/12/31')
+    expect(relativeTime('bad')).toBe('')
+  })
+})
+
+describe('filterTasks', () => {
+  it('matches title case-insensitively and passes through on empty query', () => {
+    const tasks = [conv('a', 'p', '', { title: '周报 Draft' }), conv('b', 'p', '', { title: '接口评审' })]
+    expect(filterTasks(tasks, '周报')).toEqual([tasks[0]])
+    expect(filterTasks(tasks, '  ')).toEqual(tasks)
+    expect(filterTasks(tasks, 'DRAFT')).toEqual([tasks[0]])
+  })
+})
diff --git a/tsconfig.tsbuildinfo b/tsconfig.tsbuildinfo
index 00c22a1..1bda813 100644
--- a/tsconfig.tsbuildinfo
+++ b/tsconfig.tsbuildinfo
@@ -1 +1 @@
-{"root":["./src/App.tsx","./src/api.ts","./src/auth.ts","./src/contracts.ts","./src/main.tsx","./src/store.ts","./src/components/AgentTracker.tsx","./src/components/Conversation.tsx","./src/components/DocViewer.tsx","./src/components/ProjectNav.tsx","./src/components/SettingsModal.tsx","./src/components/Workbench.tsx","./src/components/Workspaces.tsx","./test/auth.test.ts","./test/contracts.test.ts"],"version":"5.9.3"}
\ No newline at end of file
+{"root":["./src/App.tsx","./src/api.ts","./src/auth.ts","./src/contracts.ts","./src/main.tsx","./src/store.ts","./src/tasklist.ts","./src/components/AgentTracker.tsx","./src/components/Conversation.tsx","./src/components/DocViewer.tsx","./src/components/SettingsModal.tsx","./src/components/TaskSidebar.tsx","./src/components/Workbench.tsx","./src/components/Workspaces.tsx","./test/auth.test.ts","./test/contracts.test.ts","./test/tasklist.test.ts"],"version":"5.9.3"}
\ No newline at end of file