diff --git a/.project-docs/30-worklog/tasks/20261013-trial-sidebar-update-8e37a2c1.md b/.project-docs/30-worklog/tasks/20261013-trial-sidebar-update-8e37a2c1.md
new file mode 100644
index 00000000..1f22a31b
--- /dev/null
+++ b/.project-docs/30-worklog/tasks/20261013-trial-sidebar-update-8e37a2c1.md
@@ -0,0 +1,57 @@
+# Task: Enable requested Code sidebar changes in current temporary app
+
+## Identity
+
+- Task ID: 20261013-trial-sidebar-update-8e37a2c1
+- Mode: Feature
+- Branch: codex/20261013-trial-sidebar-update-8e37a2c1-trial-sidebar-update
+- Worktree: /Users/chillishark/Makelore 麦洛/.codex-worktrees/makelore/20261013-trial-sidebar-update-8e37a2c1
+- Base commit: 16b10c44f1b846f33dbf28c0050f15a68fdae53b
+- Owner: codex
+- Status: In Progress
+
+## Scope
+
+- Enable the requested Coding前端-页面修改2 thread's latest Code sidebar correction in the current temporary app alongside the delivered TOOL/SKILL and left-card knowledge upload correction. Preserve earlier address-bar/refresh-icon/Work-tab introduction layout changes already included in the baseline.
+
+## Intent And Constraints
+
+- User explicitly requested updating the current temporary app with this thread's work. Apply only committed Renderer/UI/test/README changes from 20e2e5996079fea29296c604f96acc268f8c65ce; do not merge or push main, clean worktrees, deploy cloud patches, restart Main, save/apply live Agent configuration, mutate user conversations, record audio or call models. Preserve current login, saved configuration, draft/input and ongoing work; refresh only after actual native saved/idle evidence.
+
+## Project Context Loaded
+
+- Task ID/mode/branch/worktree/base: Identity above exactly matches official check/start/status. New managed feature worktree from the previous task's docs-only delivery commit16b10c4, with effective Renderer ad223603 and actual Main020b366/PID12660/Host58003.
+- Other active local tasks: all50 exact peer owner/task-record paths were read only by delegated audit. Source sidebar task ready; recent Agent selectors, knowledge layout, channel, composer and consolidation tasks are compatible. An old child-language placeholder has unknown scope but no concrete dependency here. No peer or canonical edits.
+- Read: AGENTS, entry/read-before-planning, memory-index, own record, positioning, historical integrated current-state, decision-index, relevant system-overview, community-collaboration, project conversations/archive domain rules, success criteria, evidence/reflection/commitment indexes and source sidebar record. Read requested thread's latest14 turns, distinguishing source user directions from screenshots and old deployment instructions.
+- Project goal/current focus: creative Electron client with project-scoped Code state and Main-owned auth/runtime/API. Shared integrated docs are historical; current runtime pointer plus immutable snapshot identify the actual temporary baseline.
+- Scope/constraints/decisions: sidebar hierarchy is already user-approved; archive remains recoverable and task/conversation identity stays Main-owned. TOOL/SKILL and left upload remain as just explicitly corrected. No API/schema, provider, runtime, account or cloud deployment change is needed.
+- Evidence/reflection/commitments: source79 units and two focused Electron scenarios passed; historical broad navigation/titlebar assertions failed before this source and are not a delivery proof. Feature-mode docs are task-scoped; source records remain read only. Real provider/cloud deployment acceptance remains separate.
+- Likely files: Sidebar.tsx, MainLayout.tsx, sidebar-peek.ts, CodingProjectConversations.tsx, classroom-workspace.css plus exact source README/test hunks. All five source product files in20e2e59^ are byte-identical to this task base, so the source patch needs no product conflict resolution. d12d214 Work-tab intro fix and d787267 address-bar fix are already ancestors.
+- Unknowns/conflicts: broad historical test failures retained as limits; none blocks the targeted change. Planning Gate: Passed before implementation.
+
+## Plan
+
+1. Apply the exact source feature hunks excluding its peer task record; verify no Main/shared/resources/package/lock/build-config delta and preserve current corrections.
+2. Run focused source unit/UI scenarios, current Agent regression assertions, typecheck, lint and default full build; review resulting immutable source.
+3. Prepare a file-only Renderer overlay over identical current Main bytes. Check live native UI saved/idle state, activate files, refresh through CUA, verify Code sidebar and retained Agent controls; finalize runtime metadata only after actual observation.
+
+## Outcome
+
+- Applied exact source20e2e59 product/README/test hunks, excluding its peer task record. New conversation is labeled and left aligned; project-card overflow owns archived/recent lists and project settings, while per-conversation rename/recoverable archive/restore and task state remain unchanged. Open project menus retain sidebar preview through the independent menu peek source.
+- Independent combined-tree review passed: five changed product files exactly match source; all three TOOL/SKILL/knowledge product files stay identical toad223603; Main/shared/resources/package/lock/build config delta versus actual Main020b366 is empty. Prior Work-tab welcome hiding, address bar placement and icon refresh remain included.
+- Default compiled build is ready; immutable snapshot and saved/idle native refresh/verification remain to deliver before runtime metadata finalization.
+
+## Verification
+
+- Typecheck, changed-file ESLint, default full build:vite with NIANCODE_RENDERER_ONLY unset, git diff --check and task-aware document drift passed.
+- 136 unit cases passed (source79 plus existing Agent configuration/knowledge57); ten test files. The two focused isolated Electron scenarios both passed (3.4s and3.9s, total8.3s): conversation rename/archive/restore without selecting/stopping target; project-targeting, peek-menu behavior, keyboard access and 128/171/256px left alignment/full label/no overflow.
+- Logs: /tmp/makelore-sidebar8e37-{type,lint,unit,build,electron}.log; Electron screenshots/artifacts: /tmp/makelore-sidebar8e37-electron. Tests use isolated temporary state and synthetic host, not real user projects/model/cloud mutations.
+- Source's broader historical titlebar/equal-height assertions are unrelated existing mismatches and were not rerun or counted as passed. No full-suite or real-provider claim.
+
+## Follow-ups
+
+- None recorded.
+
+## Promotion Candidates
+
+- None recorded.
diff --git a/README.md b/README.md
index 1a6fc37b..a5a34e1c 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ Pi 正式包必须继续运行 `pnpm run verify:artifact:pi`、`pnpm run smoke:p
 
 ### 项目智能体与对话
 
-- 对话行的“…”菜单支持重命名和归档，项目下的归档入口可查看并恢复原对话。归档保留历史、附件和 Pi Session，不中止正在执行的任务；已归档对话仍可查看、处理审批或中止，恢复后才能继续发送或创建分支。全部归档后显示空列表，不自动创建空对话。
+- 项目下仅保留与项目卡片左边框对齐的“＋ 新对话”；项目卡片右侧的“…”菜单提供“已归档对话”和“项目设置”。对话行的“…”菜单支持重命名和归档，归档列表可查看并恢复原对话，也可返回最近对话；新建或恢复后回到最近对话列表。归档保留历史、附件和 Pi Session，不中止正在执行的任务；已归档对话仍可查看、处理审批或中止，恢复后才能继续发送或创建分支。全部归档后显示空列表，不自动创建空对话。
 - 新对话使用第一条实际用户消息的首行作为标题，合并空白并截取最多 32 个字符；纯图片消息使用“附件对话”，命令和空消息不参与命名。不额外调用模型，不随后续消息改名。历史标题保持原样，手动重命名优先，标题最多 200 个字符；仅改标题不改变最近对话排序。Main 在本地元数据落盘后通过独立的 metadata-changed 事件通知列表，事件重连也会刷新列表。
 
 - 新项目自动建立一个内部默认编程智能体，`defaultAgentId` 固定其身份；创建项目不再要求创建或选择智能体。有可用的全局默认模型时复制精确账号与模型，没有时保留待选择状态。旧项目优先保留原默认或置顶/首个可用智能体，保留所有历史绑定；全部停用时新增默认配置，不复活旧配置。
diff --git a/src/components/layout/MainLayout.tsx b/src/components/layout/MainLayout.tsx
index 7d1a5def..6e34ad2e 100644
--- a/src/components/layout/MainLayout.tsx
+++ b/src/components/layout/MainLayout.tsx
@@ -25,6 +25,7 @@ export function MainLayout() {
     focus: false,
     sidebar: false,
     titlebar: false,
+    menu: false,
   });
   const activeModule = getAiModuleForPath(location.pathname);
   const isPaintingModule = activeModule === 'painting';
@@ -60,7 +61,7 @@ export function MainLayout() {
   }, [sidebarCollapsed, isCloudAgents]);
 
   useEffect(() => {
-    sidebarPeekSourcesRef.current = { toggle: false, focus: false, sidebar: false, titlebar: false };
+    sidebarPeekSourcesRef.current = { toggle: false, focus: false, sidebar: false, titlebar: false, menu: false };
     // This transient state mirrors the external persisted sidebar preference;
     // reset it on preference changes and both edges of the Agents boundary so
     // a previous module's preview or timer cannot reopen the manual-only sidebar.
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 84f86bf1..d1963cd4 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -4,14 +4,17 @@ import { useCallback, useEffect, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { useTranslation } from 'react-i18next';
 import { useLocation, useNavigate } from 'react-router-dom';
+import * as DropdownMenu from '@radix-ui/react-dropdown-menu';
 import {
+  Archive,
   Bot,
   BotMessageSquare,
   Cpu,
-  ChevronRight,
   FolderKanban,
   Gamepad2,
   LogOut,
+  MessageSquare,
+  MoreHorizontal,
   Plus,
   Settings as SettingsIcon,
   UserCircle2,
@@ -51,7 +54,7 @@ import { getAccountInitial } from '@/components/profile/user-avatar-utils';
 import { UserProfileDialog } from '@/components/profile/UserProfileDialog';
 import { useSettingsStore } from '@/stores/settings';
 import { useAuthStore } from '@/stores/auth';
-import { useCodingWorkspaceStore } from '@/stores/coding-workspace';
+import { codingWorkspaceStore, useCodingWorkspaceStore } from '@/stores/coding-workspace';
 import { useProviderStore } from '@/stores/providers';
 import type { CodingProjectSummary } from '@/types/coding-project';
 import { useProjectConfigStore } from '@/stores/project-config';
@@ -114,6 +117,8 @@ export function Sidebar({
   } = useCurrentUserProfile();
   const refreshProviderSnapshot = useProviderStore((state) => state.refreshProviderSnapshot);
   const [projectsOpen, setProjectsOpen] = useState(true);
+  const [archivedProjectId, setArchivedProjectId] = useState<string | null>(null);
+  const [projectMenuOpen, setProjectMenuOpen] = useState(false);
   const [accountMenuOpen, setAccountMenuOpen] = useState(false);
   const [profileDialogOpen, setProfileDialogOpen] = useState(false);
   const [createDialogOpen, setCreateDialogOpen] = useState(false);
@@ -339,6 +344,24 @@ export function Sidebar({
     await readAndEnterProject(project);
   }, [readAndEnterProject]);
 
+  const openProjectAction = async (project: CodingProjectSummary, action: 'settings' | 'archived' | 'recent') => {
+    const opening = openProject(project);
+    const intent = projectEntryIntentRef.current;
+    await opening;
+    if (intent !== projectEntryIntentRef.current) return;
+    if (codingWorkspaceStore.getState().activeProjectId !== project.id) return;
+    if (action === 'settings') {
+      navigate('/project-config');
+    } else {
+      setArchivedProjectId(action === 'archived' ? project.id : null);
+    }
+  };
+
+  useEffect(() => {
+    onSidebarPeekChange?.(projectMenuOpen, 'menu');
+    return () => onSidebarPeekChange?.(false, 'menu');
+  }, [projectMenuOpen, onSidebarPeekChange]);
+
   useEffect(() => {
     if (!isProgrammingModule) return undefined;
     return subscribeCodingProjectOpenRequest((projectId) => {
@@ -476,26 +499,71 @@ export function Sidebar({
 
               {visibleProjects.map((project) => {
                 const active = activeProject?.id === project.id;
+                const archived = active && archivedProjectId === project.id;
                 return (
-                  <div key={project.id}><button
-                    type="button"
-                    data-testid={`sidebar-course-project-${project.id}`}
-                    aria-label={`进入项目 ${project.name}`}
-                    title={project.name}
-                    aria-current={active ? 'page' : undefined}
-                    onClick={() => void openProject(project)}
-                    className={cn(
-                      'classroom-project-card motion-press group/project flex w-full items-center gap-2 rounded-xl px-3 py-2 text-left transition-colors duration-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/35 focus-visible:ring-offset-1',
-                      active
-                        ? 'bg-transparent text-foreground'
-                        : 'bg-transparent text-foreground hover:bg-surface-tertiary',
+                  <div key={project.id}>
+                    <div className="relative">
+                      <button
+                        type="button"
+                        data-testid={`sidebar-course-project-${project.id}`}
+                        aria-label={`进入项目 ${project.name}`}
+                        title={project.name}
+                        aria-current={active ? 'page' : undefined}
+                        onClick={() => void openProject(project)}
+                        className={cn(
+                          'classroom-project-card motion-press group/project flex w-full items-center gap-2 rounded-xl py-2 pl-3 pr-10 text-left transition-colors duration-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/35 focus-visible:ring-offset-1',
+                          active
+                            ? 'bg-transparent text-foreground'
+                            : 'bg-transparent text-foreground hover:bg-surface-tertiary',
+                        )}
+                      >
+                        {workspaceLayout ? <span className="classroom-project-icon" data-tone={['orange', 'green', 'blue'][Array.from(project.id).reduce((sum, char) => sum + char.charCodeAt(0), 0) % 3]}><Gamepad2 aria-hidden="true" /></span> : <Gamepad2 className="h-3.5 w-3.5 shrink-0 text-muted-foreground" />}
+                        <span className="min-w-0 flex-1 truncate text-[13px] font-medium">{project.name}</span>
+                      </button>
+                      <DropdownMenu.Root onOpenChange={setProjectMenuOpen}>
+                        <DropdownMenu.Trigger asChild>
+                          <button
+                            type="button"
+                            aria-label={`项目操作：${project.name}`}
+                            title="项目操作"
+                            className="classroom-project-actions absolute right-1 top-1/2 flex h-8 w-8 -translate-y-1/2 items-center justify-center rounded-lg text-muted-foreground hover:bg-surface-tertiary hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/35 data-[state=open]:bg-surface-tertiary"
+                          >
+                            <MoreHorizontal aria-hidden="true" className="h-4 w-4" />
+                          </button>
+                        </DropdownMenu.Trigger>
+                        <DropdownMenu.Portal>
+                          <DropdownMenu.Content
+                            className="z-[400] min-w-40 rounded-lg border bg-popover p-1 text-sm shadow-md"
+                            align="end"
+                            sideOffset={4}
+                          >
+                            <DropdownMenu.Item
+                              className="flex items-center rounded p-2 outline-none focus:bg-accent"
+                              onSelect={() => void openProjectAction(project, archived ? 'recent' : 'archived')}
+                            >
+                              {archived ? <MessageSquare aria-hidden="true" className="mr-2 h-3.5 w-3.5" /> : <Archive aria-hidden="true" className="mr-2 h-3.5 w-3.5" />}
+                              {archived ? '最近对话' : '已归档对话'}
+                            </DropdownMenu.Item>
+                            <DropdownMenu.Item
+                              className="flex items-center rounded p-2 outline-none focus:bg-accent"
+                              onSelect={() => void openProjectAction(project, 'settings')}
+                            >
+                              <SettingsIcon aria-hidden="true" className="mr-2 h-3.5 w-3.5" />
+                              项目设置
+                            </DropdownMenu.Item>
+                          </DropdownMenu.Content>
+                        </DropdownMenu.Portal>
+                      </DropdownMenu.Root>
+                    </div>
+                    {active && (
+                      <CodingProjectConversations
+                        key={project.id}
+                        projectId={project.id}
+                        compact={workspaceLayout}
+                        archived={archived}
+                        onArchivedChange={(value) => setArchivedProjectId(value ? project.id : null)}
+                      />
                     )}
-                  >
-                    {workspaceLayout ? <span className="classroom-project-icon" data-tone={['orange', 'green', 'blue'][Array.from(project.id).reduce((sum, char) => sum + char.charCodeAt(0), 0) % 3]}><Gamepad2 aria-hidden="true" /></span> : <Gamepad2 className="h-3.5 w-3.5 shrink-0 text-muted-foreground" />}
-                    <span className="min-w-0 flex-1 truncate text-[13px] font-medium">{project.name}</span>
-                    <ChevronRight aria-hidden="true" className="h-3.5 w-3.5 shrink-0 -translate-x-0.5 text-muted-foreground opacity-50 transition-[opacity,transform,color] duration-200 ease-out group-hover/project:translate-x-0 group-hover/project:text-foreground group-hover/project:opacity-100 group-focus-visible/project:translate-x-0 group-focus-visible/project:text-foreground group-focus-visible/project:opacity-100" />
-                  </button>
-                  {active && <CodingProjectConversations key={project.id} projectId={project.id} compact={workspaceLayout} />}
                   </div>
                 );
               })}
diff --git a/src/components/layout/sidebar-peek.ts b/src/components/layout/sidebar-peek.ts
index 01210013..5846be0e 100644
--- a/src/components/layout/sidebar-peek.ts
+++ b/src/components/layout/sidebar-peek.ts
@@ -1 +1 @@
-export type SidebarPeekSource = 'toggle' | 'focus' | 'sidebar' | 'titlebar';
+export type SidebarPeekSource = 'toggle' | 'focus' | 'sidebar' | 'titlebar' | 'menu';
diff --git a/src/pages/Chat/CodingProjectConversations.tsx b/src/pages/Chat/CodingProjectConversations.tsx
index 40d07077..95e0ca9a 100644
--- a/src/pages/Chat/CodingProjectConversations.tsx
+++ b/src/pages/Chat/CodingProjectConversations.tsx
@@ -4,7 +4,7 @@ import {
   Archive,
   ArchiveRestore,
   LoaderCircle,
-  MessageSquarePlus,
+  Plus,
   MoreHorizontal,
   Pencil,
   Settings2,
@@ -18,13 +18,22 @@ import type { CodingConversationMetadata } from '@/types/coding-project';
 import { CodingConversationRenameDialog } from './CodingConversationRenameDialog';
 import { createLocalConversationSnapshot } from './coding-chat-snapshot';
 
-export function CodingProjectConversations({ projectId, compact = false }: { projectId: string; compact?: boolean }) {
+export function CodingProjectConversations({
+  projectId,
+  compact = false,
+  archived = false,
+  onArchivedChange,
+}: {
+  projectId: string;
+  compact?: boolean;
+  archived?: boolean;
+  onArchivedChange?: (archived: boolean) => void;
+}) {
   const navigate = useNavigate();
   const conversations = useCodingWorkspaceStore((state) => state.conversations);
   const activeProjectId = useCodingWorkspaceStore((state) => state.activeProjectId);
   const selected = useCodingConversationStore((state) => state.selectedConversationId);
   const summaries = useCodingConversationStore((state) => state.summariesByConversationId);
-  const [archived, setArchived] = useState(false);
   const [busy, setBusy] = useState<string | null>(null);
   const [rename, setRename] = useState<CodingConversationMetadata | null>(null);
   const selectedConversation = conversations.find((item) => item.id === selected);
@@ -36,9 +45,9 @@ export function CodingProjectConversations({ projectId, compact = false }: { pro
       previous?.archivedAt &&
       !selectedConversation?.archivedAt
     )
-      setArchived(false);
+      onArchivedChange?.(false);
     previousSelection.current = selectedConversation;
-  }, [selectedConversation]);
+  }, [selectedConversation, onArchivedChange]);
   if (activeProjectId !== projectId) return null;
   const act = async (key: string, operation: () => Promise<unknown>) => {
     setBusy(key);
@@ -76,34 +85,34 @@ export function CodingProjectConversations({ projectId, compact = false }: { pro
           aria-label="新建对话"
           title="新建对话"
           disabled={!!busy}
-          className={`flex flex-1 items-center gap-1.5 rounded py-2 text-xs hover:bg-surface-tertiary ${compact ? "justify-center px-1" : "px-2"}`}
+          className={`flex shrink-0 items-center gap-1.5 rounded py-2 pr-2 text-xs hover:bg-surface-tertiary ${compact ? "pl-0" : "pl-2"}`}
           onClick={() =>
             void act('new', async () => {
               const workspace = codingWorkspaceStore.getState();
               const conversation = await workspace.createConversation();
               if (codingWorkspaceStore.getState().activeProjectId === projectId) {
-                setArchived(false);
+                onArchivedChange?.(false);
                 await select(conversation);
               }
             })
           }
         >
-          <MessageSquarePlus className="h-3.5 w-3.5" />
-          {!compact && '新对话'}
-        </button>
-        <button
-          aria-label={archived ? '返回最近对话' : '查看归档对话'}
-          title={archived ? '返回最近对话' : '查看归档对话'}
-          onClick={() => setArchived(!archived)}
-          className="p-2"
-        >
-          <Archive className="h-3.5 w-3.5" />
-        </button>
-        <button aria-label="项目设置" title="项目设置" onClick={() => navigate('/project-config')} className="p-2">
-          <Settings2 className="h-3.5 w-3.5" />
+          <Plus aria-hidden="true" className="h-3.5 w-3.5 shrink-0" />
+          新对话
         </button>
       </div>
-      {archived && <p className="px-2 py-1 text-xs text-muted-foreground">已归档</p>}
+      {archived && (
+        <div className="flex flex-wrap items-center gap-x-2 gap-y-1 px-2 py-1 text-xs text-muted-foreground">
+          <span>已归档对话</span>
+          <button
+            type="button"
+            onClick={() => onArchivedChange?.(false)}
+            className="rounded py-1 text-foreground underline-offset-2 hover:underline focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/35"
+          >
+            返回最近对话
+          </button>
+        </div>
+      )}
       {conversations
         .filter((item) => Boolean(item.archivedAt) === archived)
         .sort((a, b) =>
@@ -175,6 +184,11 @@ export function CodingProjectConversations({ projectId, compact = false }: { pro
                           await codingWorkspaceStore
                             .getState()
                             .patchConversation(item.id, { archived: !item.archivedAt });
+                          if (
+                            item.archivedAt &&
+                            codingWorkspaceStore.getState().activeProjectId === projectId
+                          )
+                            onArchivedChange?.(false);
                           if (
                             !item.archivedAt &&
                             codingConversationStore.getState().selectedConversationId === item.id
diff --git a/src/pages/Chat/classroom-workspace.css b/src/pages/Chat/classroom-workspace.css
index a562e52c..56e51910 100644
--- a/src/pages/Chat/classroom-workspace.css
+++ b/src/pages/Chat/classroom-workspace.css
@@ -20,7 +20,7 @@
 [data-testid="sidebar"][data-classroom="true"] .classroom-projects { margin-top: 8px; }
 [data-testid="sidebar"][data-classroom="true"] .classroom-projects-heading { padding: 6px 3px; color: #64758a; }
 [data-testid="sidebar"][data-classroom="true"] .classroom-projects-heading > svg { display: none; }
-[data-testid="sidebar"][data-classroom="true"] .classroom-project-card { min-height: 56px; gap: 9px; padding: 8px; border: 1px solid transparent; border-radius: 13px; }
+[data-testid="sidebar"][data-classroom="true"] .classroom-project-card { min-height: 56px; gap: 9px; padding: 8px 40px 8px 8px; border: 1px solid transparent; border-radius: 13px; }
 [data-testid="sidebar"][data-classroom="true"] .classroom-project-card:hover { background: #fff; }
 [data-testid="sidebar"][data-classroom="true"] .classroom-project-card[aria-current="page"] { background: #fff; border-color: #c9d9e9; box-shadow: 0 3px 0 #e2eaf3; }
 .classroom-project-icon { display: grid; place-items: center; flex-shrink: 0; width: 34px; height: 37px; border-radius: 10px; background: #ffead9; color: #a85026; }
diff --git a/tests/e2e/main-navigation.spec.ts b/tests/e2e/main-navigation.spec.ts
index 1a89c865..eb48b6f0 100644
--- a/tests/e2e/main-navigation.spec.ts
+++ b/tests/e2e/main-navigation.spec.ts
@@ -393,7 +393,8 @@ test.describe('Makelore module navigation without setup flow', () => {
       await sidebarResizer.dblclick();
       await expect(sidebarResizer).toHaveAttribute('aria-valuenow', '171');
 
-      await sidebar.getByRole('button', { name: '项目设置', exact: true }).click();
+      await sidebar.getByRole('button', { name: '项目操作：故事绘本', exact: true }).click();
+      await page.getByRole('menuitem', { name: '项目设置', exact: true }).click();
       await expect(page).toHaveURL(/\/project-config$/);
       await expect(page.getByTestId('project-configuration-page')).toBeVisible();
       await expect(sidebar.getByTestId('sidebar-module-switcher')).toHaveCount(0);
@@ -404,7 +405,8 @@ test.describe('Makelore module navigation without setup flow', () => {
       await expect(page).toHaveURL(/\/chat$/);
       await expect(moduleReturn).toBeVisible();
 
-      await sidebar.getByRole('button', { name: '项目设置', exact: true }).click();
+      await sidebar.getByRole('button', { name: '项目操作：故事绘本', exact: true }).click();
+      await page.getByRole('menuitem', { name: '项目设置', exact: true }).click();
       await page.getByTestId('resource-card-plugins').click();
       await expect(page).toHaveURL(/\/project-config\/plugins\?/);
       const plugins = page.getByTestId('project-plugins-sheet');
diff --git a/tests/e2e/pi-coding-first-chat.spec.ts b/tests/e2e/pi-coding-first-chat.spec.ts
index ba418a99..b05db950 100644
--- a/tests/e2e/pi-coding-first-chat.spec.ts
+++ b/tests/e2e/pi-coding-first-chat.spec.ts
@@ -632,7 +632,8 @@ async function installCodingFirstChatHost(
         return respond({ project: activeProject });
       }
       if (multipleProjects && path === `/api/coding/projects/config?projectId=${otherProject.id}`)
-        return respond({ snapshot: { project: otherProject, config, knowledgeFiles: [] } });
+        return respond({ snapshot: { project: otherProject,
+          config: { ...config, defaultAgentId: agent.id, agents: [{ ...agent, prompt: 'Settings for Another project' }] }, knowledgeFiles: [] } });
       if (multipleProjects && path === `/api/coding/projects/conversations?projectId=${otherProject.id}`)
         return respond({ conversations: [{ ...secondConversation, id: 'conversation-other-project', title: 'Other project conversation' }] });
       if (multipleProjects && path === '/api/coding/conversations/conversation-other-project/snapshot')
@@ -995,7 +996,10 @@ test('conversation menus rename, archive and restore without selecting or stoppi
     await page.evaluate(() => { window.location.hash = '/chat'; });
     const sidebar = page.getByTestId('project-conversations');
     const header = page.getByTestId('coding-conversation-header');
+    const projectMenu = page.getByRole('button', { name: '项目操作：PI first chat', exact: true });
     await expect(header).toContainText('新对话');
+    await expect(sidebar.getByRole('button', { name: '查看归档对话' })).toHaveCount(0);
+    await expect(sidebar.getByRole('button', { name: '项目设置', exact: true })).toHaveCount(0);
     await sidebar.getByRole('button', { name: '对话操作：Second Conversation' }).focus();
     await page.keyboard.press('Enter');
     await page.getByRole('menuitem', { name: '重命名', exact: true }).click();
@@ -1009,20 +1013,148 @@ test('conversation menus rename, archive and restore without selecting or stoppi
     await page.keyboard.press('Enter');
     await page.getByRole('menuitem', { name: '归档', exact: true }).click();
     await expect(sidebar.getByRole('button', { name: '重命名后的会话', exact: true })).toHaveCount(0);
-    await sidebar.getByRole('button', { name: '查看归档对话' }).click();
+    await projectMenu.focus();
+    await page.keyboard.press('Enter');
+    await page.getByRole('menuitem', { name: '已归档对话', exact: true }).click();
+    await expect(sidebar.getByText('已归档对话', { exact: true })).toBeVisible();
+    await expect(sidebar.getByRole('button', { name: '返回最近对话', exact: true })).toBeVisible();
+    await expect(header).toContainText('新对话');
+    await projectMenu.click();
+    await expect(page.getByRole('menuitem', { name: '最近对话', exact: true })).toBeVisible();
+    await page.keyboard.press('Escape');
     await sidebar.getByRole('button', { name: '重命名后的会话', exact: true }).click();
     await expect(page.getByRole('button', { name: '恢复对话', exact: true })).toBeVisible();
     await expect(page.getByRole('button', { name: '发送', exact: true })).toHaveCount(0);
     await page.getByRole('button', { name: '恢复对话', exact: true }).click();
     await expect(header).toContainText('重命名后的会话');
-    await expect(sidebar.getByRole('button', { name: '查看归档对话' })).toBeVisible();
+    await expect(sidebar.getByRole('button', { name: '返回最近对话', exact: true })).toHaveCount(0);
+    await expect(sidebar.getByRole('button', { name: '重命名后的会话', exact: true })).toBeVisible();
+    await projectMenu.click();
+    await page.getByRole('menuitem', { name: '已归档对话', exact: true }).click();
+    await sidebar.getByRole('button', { name: '返回最近对话', exact: true }).click();
+    await expect(sidebar.getByRole('button', { name: '重命名后的会话', exact: true })).toBeVisible();
     const requests = (await readState(electronApp)).captured;
     expect(requests.some((request) => request.path.endsWith('/abort'))).toBe(false);
     expect(requests.filter((request) => request.method === 'PATCH' && request.path.endsWith('/conversation-pi-second'))
       .map((request) => request.body)).toEqual([
       { title: '重命名后的会话' }, { archived: true }, { archived: false },
     ]);
-    await page.screenshot({ path: 'test-results/coding-session-controls.png' });
+    await page.screenshot({ path: test.info().outputPath('coding-session-controls.png') });
+  } finally { await releaseSnapshot(electronApp); }
+});
+
+test('project menus target their project and keep new conversations aligned at every sidebar width', async ({ launchElectronApp }) => {
+  const electronApp = await launchElectronApp({ skipSetup: true });
+  let page = await getStableWindow(electronApp);
+  const connection = await page.evaluate(async () => ({
+    token: await window.electron.ipcRenderer.invoke('hostapi:token') as string,
+    baseUrl: await window.electron.ipcRenderer.invoke('hostapi:base-url') as string,
+  }));
+  await installCodingFirstChatHost(electronApp, connection, true, false, false, undefined, true);
+  await settleSnapshot(electronApp);
+  await disableCodingEventSource(page);
+  try {
+    await page.reload();
+    page = await getStableWindow(electronApp);
+    await page.getByTestId('ai-module-option-programming').click();
+    await page.evaluate(() => { window.location.hash = '/chat'; });
+    const rail = page.getByTestId('sidebar');
+    const conversations = page.getByTestId('project-conversations');
+    const create = conversations.getByRole('button', { name: '新建对话', exact: true });
+    const primaryProject = page.getByTestId('sidebar-course-project-project-pi-first-chat');
+    const otherProject = page.getByTestId('sidebar-course-project-project-pi-other');
+    const primaryMenu = page.getByRole('button', { name: '项目操作：PI first chat', exact: true });
+    const otherMenu = page.getByRole('button', { name: '项目操作：Another project', exact: true });
+    const resizer = page.getByRole('separator', { name: '调整左侧功能栏宽度' });
+    await expect(primaryProject).toHaveAttribute('aria-current', 'page');
+    await expect(create).toHaveText('新对话');
+    await expect(conversations.locator('.classroom-conversation-actions').getByRole('button')).toHaveCount(1);
+    expect(await otherMenu.evaluate(element => element.parentElement?.querySelector('button')?.contains(element))).toBe(false);
+
+    for (const width of [171, 128, 256]) {
+      if (width !== 171) await resizer.press(width === 128 ? 'Home' : 'End');
+      await expect(rail).toHaveCSS('width', `${width}px`);
+      await expect(create).toBeInViewport({ ratio: 1 });
+      const [iconBounds, cardBounds] = await Promise.all([create.locator('svg').boundingBox(), primaryProject.boundingBox()]);
+      expect(Math.abs(iconBounds!.x - cardBounds!.x)).toBeLessThanOrEqual(1);
+      expect(await create.evaluate(element => {
+        const text = Array.from(element.childNodes).find(node => node.nodeType === Node.TEXT_NODE && node.textContent?.includes('新对话'));
+        if (!text) return false;
+        const range = document.createRange();
+        range.selectNodeContents(text);
+        const label = range.getBoundingClientRect();
+        const button = element.getBoundingClientRect();
+        return label.width > 0 && label.left >= button.left && label.right <= button.right && label.bottom <= button.bottom;
+      })).toBe(true);
+      for (const element of [rail, conversations, create, primaryProject]) {
+        expect(await element.evaluate(node => node.scrollWidth <= node.clientWidth)).toBe(true);
+      }
+      await expect(primaryMenu).toBeInViewport({ ratio: 1 });
+      await page.screenshot({ path: test.info().outputPath(`sidebar-actions-${width}.png`) });
+    }
+
+    const sidebarToggle = page.getByTestId('titlebar-sidebar-toggle');
+    await sidebarToggle.click();
+    await page.mouse.move(800, 500);
+    await expect(rail).toHaveAttribute('aria-hidden', 'true');
+    await sidebarToggle.hover();
+    await expect(rail).toHaveAttribute('aria-hidden', 'false');
+    await primaryMenu.click();
+    const archivedMenuItem = page.getByRole('menuitem', { name: '已归档对话', exact: true });
+    await expect(archivedMenuItem).toBeVisible();
+    await page.mouse.move(800, 500);
+    // Stay outside the rail longer than its 180ms peek-close delay. An open
+    // portal menu must keep the preview available and remain above it.
+    await page.waitForTimeout(350);
+    // Radix temporarily marks background content aria-hidden while its modal
+    // menu is open, so measure the rail's visual state here instead.
+    await expect(rail).toHaveCSS('width', '256px');
+    await expect(rail).toHaveCSS('opacity', '1');
+    await expect(archivedMenuItem).toBeVisible();
+    await archivedMenuItem.click({ trial: true });
+    await page.screenshot({ path: test.info().outputPath('sidebar-project-menu-peek.png') });
+    await archivedMenuItem.click();
+    await page.mouse.move(800, 500);
+    await expect(rail).toHaveAttribute('aria-hidden', 'true');
+    await sidebarToggle.hover();
+    await conversations.getByRole('button', { name: '返回最近对话', exact: true }).click();
+    await sidebarToggle.click();
+    await expect(rail).toHaveCSS('width', '256px');
+    await expect(resizer).toBeVisible();
+
+    const activationRequests = () => readState(electronApp).then(state => state.captured.filter(request =>
+      request.path === '/api/coding/projects/active' && request.method === 'POST'));
+    const activationsBeforeMenu = await activationRequests();
+    await otherMenu.focus();
+    await page.keyboard.press('Enter');
+    await expect(page.getByRole('menuitem', { name: '已归档对话', exact: true })).toBeVisible();
+    await expect(page.getByRole('menuitem', { name: '项目设置', exact: true })).toBeVisible();
+    await expect(primaryProject).toHaveAttribute('aria-current', 'page');
+    await expect(otherProject).not.toHaveAttribute('aria-current', 'page');
+    await expect(page.getByTestId('coding-conversation-header')).toContainText('新对话');
+    expect(await activationRequests()).toEqual(activationsBeforeMenu);
+    await page.keyboard.press('Escape');
+    await expect(otherMenu).toBeFocused();
+    await otherMenu.click();
+    await page.getByRole('menuitem', { name: '项目设置', exact: true }).click();
+    await expect(page.getByTestId('project-configuration-page')).toBeVisible();
+    await expect(page.getByRole('textbox', { name: '项目提示词', exact: true })).toHaveValue('Settings for Another project');
+    await expect(otherProject).toHaveAttribute('aria-current', 'page');
+    expect((await activationRequests()).at(-1)?.body).toEqual({ projectId: 'project-pi-other' });
+
+    // The archive action also validates and activates an inactive project.
+    await primaryMenu.click();
+    await page.getByRole('menuitem', { name: '已归档对话', exact: true }).click();
+    await expect(page.getByTestId('coding-conversation-header')).toBeVisible();
+    await expect(primaryProject).toHaveAttribute('aria-current', 'page');
+    await expect(conversations.getByText('已归档对话', { exact: true })).toBeVisible();
+    expect((await activationRequests()).at(-1)?.body).toEqual({ projectId: 'project-pi-first-chat' });
+    await primaryMenu.click();
+    await page.getByRole('menuitem', { name: '最近对话', exact: true }).click();
+    await expect(conversations.getByRole('button', { name: '返回最近对话', exact: true })).toHaveCount(0);
+    await expect(conversations.getByRole('button', { name: '新对话', exact: true })).toBeVisible();
+    expect((await readState(electronApp)).captured.filter(request => request.method === 'POST'
+      && /\/(prompt|messages|abort)$/.test(request.path))).toHaveLength(0);
   } finally { await releaseSnapshot(electronApp); }
 });
 
@@ -1579,7 +1711,10 @@ test('PI feature UI isolates Conversations and exposes queue, interaction, model
     )).toBe(false);
     await page.getByRole('tab', { name: '操作对话' }).click();
     await expect(page.getByTestId('agent-browser-panel')).toHaveCount(0);
-    await expect(page.getByRole('button', { name: '项目设置' })).toHaveCount(1);
+    await expect(page.getByRole('button', { name: '项目设置' })).toHaveCount(0);
+    await page.getByRole('button', { name: '项目操作：PI first chat', exact: true }).click();
+    await expect(page.getByRole('menuitem', { name: '项目设置', exact: true })).toBeVisible();
+    await page.keyboard.press('Escape');
     await expect(page.getByTestId('project-conversations')).toBeVisible();
     const activeProcess = page.getByTestId('coding-process-group');
     await expect(activeProcess).toHaveAttribute('open', '');
diff --git a/tests/unit/coding-chat-panel.test.tsx b/tests/unit/coding-chat-panel.test.tsx
index adc4e921..547b9893 100644
--- a/tests/unit/coding-chat-panel.test.tsx
+++ b/tests/unit/coding-chat-panel.test.tsx
@@ -523,7 +523,15 @@ describe('CodingChatPanel first Conversation', () => {
       run: { status: 'running', runId: 'run-1' } });
     const { CodingChatPanel: CoreChatPanel } = await import('@/pages/Chat/CodingChatPanel');
     const { CodingProjectConversations } = await import('@/pages/Chat/CodingProjectConversations');
-    const CodingChatPanel = (props: import('@/pages/Chat/CodingChatPanel').CodingChatPanelProps) => <><CodingProjectConversations projectId={project.id} /><CoreChatPanel {...props} /></>;
+    const { useState } = await import('react');
+    const CodingChatPanel = () => {
+      const [archived, setArchived] = useState(false);
+      return <>
+        <button onClick={() => setArchived(true)}>打开归档列表</button>
+        <CodingProjectConversations projectId={project.id} archived={archived} onArchivedChange={setArchived} />
+        <CoreChatPanel />
+      </>;
+    };
     const { codingConversationStore } = await import('@/stores/coding-conversations');
     render(<CodingChatPanel />);
     const menu = await screen.findByRole('button', { name: '对话操作：新对话' });
@@ -533,7 +541,8 @@ describe('CodingChatPanel first Conversation', () => {
     await screen.findByRole('heading', { name: '今天，你想创造什么？' });
     expect(projectApi.create).not.toHaveBeenCalled();
     expect(conversationApi.abort).not.toHaveBeenCalled();
-    fireEvent.click(screen.getByRole('button', { name: '查看归档对话' }));
+    fireEvent.click(screen.getByRole('button', { name: '打开归档列表' }));
+    expect(screen.getByText('已归档对话')).toBeVisible();
     fireEvent.click(within(screen.getByTestId('project-conversations')).getByRole('button', { name: '新对话', exact: true }));
     await screen.findByText('此对话已归档，任务仍在运行。');
     expect(screen.queryByRole('button', { name: '发送', exact: true })).not.toBeInTheDocument();
@@ -541,6 +550,92 @@ describe('CodingChatPanel first Conversation', () => {
     await waitFor(() => expect(screen.queryByRole('button', { name: '恢复对话' })).not.toBeInTheDocument());
     expect(codingConversationStore.getState().selectedConversationId).toBe(conversation.id);
     expect(projectApi.patch).toHaveBeenLastCalledWith(conversation.id, { archived: false });
+    expect(screen.queryByText('已归档对话')).not.toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: '返回最近对话' })).not.toBeInTheDocument();
+    expect(within(screen.getByTestId('project-conversations')).getByRole('button', { name: '新对话', exact: true })).toHaveAttribute('aria-current', 'page');
+    expect(conversationApi.abort).not.toHaveBeenCalled();
+  });
+
+  it('returns to recent conversations when restoring an unselected archived conversation from its menu', async () => {
+    const archivedConversation = {
+      ...conversation,
+      id: 'archived-conversation',
+      title: '归档中的对话',
+      archivedAt: '2026-09-20T00:00:00Z',
+    };
+    projectApi.list.mockResolvedValue({ projects: [project], activeProjectId: project.id });
+    projectApi.config.mockResolvedValue({ project, config });
+    projectApi.conversations.mockResolvedValue([conversation, archivedConversation]);
+    projectApi.patch.mockResolvedValue({ ...archivedConversation, archivedAt: null });
+    conversationApi.events.mockResolvedValue(new FakeEventSource() as unknown as EventSource);
+    const { createLocalConversationSnapshot } = await import('@/pages/Chat/coding-chat-snapshot');
+    conversationApi.snapshot.mockResolvedValue(createLocalConversationSnapshot(project.id, conversation));
+    const { CodingChatPanel: CoreChatPanel } = await import('@/pages/Chat/CodingChatPanel');
+    const { CodingProjectConversations } = await import('@/pages/Chat/CodingProjectConversations');
+    const { codingConversationStore } = await import('@/stores/coding-conversations');
+    const { useState } = await import('react');
+    const CodingChatPanel = () => {
+      const [archived, setArchived] = useState(true);
+      return <>
+        <CodingProjectConversations projectId={project.id} archived={archived} onArchivedChange={setArchived} />
+        <CoreChatPanel />
+      </>;
+    };
+    render(<CodingChatPanel />);
+    await waitFor(() => expect(codingConversationStore.getState().selectedConversationId).toBe(conversation.id));
+    const list = within(screen.getByTestId('project-conversations'));
+    expect(list.getByText('已归档对话')).toBeVisible();
+    expect(list.queryByRole('button', { name: conversation.title, exact: true })).not.toBeInTheDocument();
+
+    fireEvent.keyDown(list.getByRole('button', { name: `对话操作：${archivedConversation.title}` }), { key: 'Enter' });
+    fireEvent.click(await screen.findByRole('menuitem', { name: '恢复到最近对话' }));
+
+    await waitFor(() => expect(list.queryByText('已归档对话')).not.toBeInTheDocument());
+    expect(projectApi.patch).toHaveBeenCalledWith(archivedConversation.id, { archived: false });
+    expect(list.getByRole('button', { name: archivedConversation.title, exact: true })).toBeVisible();
+    expect(list.getByRole('button', { name: conversation.title, exact: true })).toHaveAttribute('aria-current', 'page');
+    expect(codingConversationStore.getState().selectedConversationId).toBe(conversation.id);
+    expect(conversationApi.snapshot).not.toHaveBeenCalledWith(archivedConversation.id);
+    expect(projectApi.create).not.toHaveBeenCalled();
+  });
+
+  it('keeps the new-conversation label visible in compact archive view and returns to recent conversations after creation', async () => {
+    const archivedConversation = { ...conversation, archivedAt: '2026-09-20T00:00:00Z' };
+    const createdConversation = { ...conversation, id: 'created-conversation', title: '新建的对话' };
+    projectApi.list.mockResolvedValue({ projects: [project], activeProjectId: project.id });
+    projectApi.config.mockResolvedValue({ project, config });
+    projectApi.conversations.mockResolvedValue([archivedConversation]);
+    projectApi.create.mockResolvedValue(createdConversation);
+    conversationApi.events.mockResolvedValue(new FakeEventSource() as unknown as EventSource);
+    const { createLocalConversationSnapshot } = await import('@/pages/Chat/coding-chat-snapshot');
+    conversationApi.snapshot.mockResolvedValue(createLocalConversationSnapshot(project.id, createdConversation));
+    const { CodingChatPanel: CoreChatPanel } = await import('@/pages/Chat/CodingChatPanel');
+    const { CodingProjectConversations } = await import('@/pages/Chat/CodingProjectConversations');
+    const { codingConversationStore } = await import('@/stores/coding-conversations');
+    const { useState } = await import('react');
+    const CodingChatPanel = () => {
+      const [archived, setArchived] = useState(true);
+      return <>
+        <CodingProjectConversations projectId={project.id} compact archived={archived} onArchivedChange={setArchived} />
+        <CoreChatPanel />
+      </>;
+    };
+    render(<CodingChatPanel />);
+    const list = within(await screen.findByTestId('project-conversations'));
+    const create = list.getByRole('button', { name: '新建对话', exact: true });
+    expect(create).toHaveTextContent('新对话');
+    expect(list.getByText('已归档对话')).toBeVisible();
+    expect(projectApi.create).not.toHaveBeenCalled();
+
+    fireEvent.click(create);
+
+    await waitFor(() => expect(codingConversationStore.getState().selectedConversationId).toBe(createdConversation.id));
+    expect(projectApi.create).toHaveBeenCalledOnce();
+    expect(list.queryByText('已归档对话')).not.toBeInTheDocument();
+    expect(list.queryByRole('button', { name: '返回最近对话' })).not.toBeInTheDocument();
+    expect(list.queryByRole('button', { name: archivedConversation.title, exact: true })).not.toBeInTheDocument();
+    expect(list.getByRole('button', { name: createdConversation.title, exact: true })).toHaveAttribute('aria-current', 'page');
+    expect(conversationApi.submit).not.toHaveBeenCalled();
   });
 
   it('renames an unselected conversation from its menu without preparing that conversation', async () => {
@@ -959,7 +1054,7 @@ describe('CodingChatPanel first Conversation', () => {
     expect(screen.queryByText('metadata rejected')).not.toBeInTheDocument();
   });
 
-  it('keeps project settings only in the Conversation list and removes legacy Header actions', async () => {
+  it('removes project toolbar actions and legacy Header actions while keeping conversation creation', async () => {
     projectApi.list.mockResolvedValue({ projects: [project], activeProjectId: project.id });
     projectApi.config.mockResolvedValue({ project, config: configForAgents([agent, reviewer]) });
     projectApi.conversations.mockResolvedValue([conversation, reviewerConversation]);
@@ -986,10 +1081,12 @@ describe('CodingChatPanel first Conversation', () => {
     expect(within(header).queryByRole('button', { name: /标为(已读|未读)/ })).not.toBeInTheDocument();
     expect(within(header).queryByRole('button', { name: '归档' })).not.toBeInTheDocument();
     expect(within(header).queryByRole('button', { name: '伙伴设置' })).not.toBeInTheDocument();
-    expect(screen.getAllByRole('button', { name: '项目设置' })).toHaveLength(1);
-
-    fireEvent.click(screen.getByRole('button', { name: '项目设置' }));
-    expect(navigate).toHaveBeenCalledWith('/project-config');
+    expect(screen.queryByRole('button', { name: '项目设置' })).not.toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: '查看归档对话' })).not.toBeInTheDocument();
+    const list = within(screen.getByTestId('project-conversations'));
+    expect(list.getByRole('button', { name: '新建对话', exact: true })).toHaveTextContent('新对话');
+    expect(list.getByRole('button', { name: `对话操作：${conversation.title}` })).toBeInTheDocument();
+    expect(onOpenProjectSettings).not.toHaveBeenCalled();
   });
 
   it('remounts pending interaction state when switching Conversations', async () => {
diff --git a/tests/unit/main-layout-sidebar-peek.test.tsx b/tests/unit/main-layout-sidebar-peek.test.tsx
index 3881dc06..b728b7e6 100644
--- a/tests/unit/main-layout-sidebar-peek.test.tsx
+++ b/tests/unit/main-layout-sidebar-peek.test.tsx
@@ -7,7 +7,7 @@ import { useSettingsStore } from '@/stores/settings';
 
 type PeekProps = {
   sidebarPeekOpen?: boolean;
-  onSidebarPeekChange?: (open: boolean, source: 'toggle' | 'focus' | 'sidebar' | 'titlebar') => void;
+  onSidebarPeekChange?: (open: boolean, source: 'toggle' | 'focus' | 'sidebar' | 'titlebar' | 'menu') => void;
   forceExpanded?: boolean;
 };
 
@@ -42,7 +42,10 @@ vi.mock('@/components/layout/Sidebar', () => ({
       data-force-expanded={forceExpanded ? 'true' : 'false'}
       onPointerEnter={() => onSidebarPeekChange?.(true, 'sidebar')}
       onPointerLeave={() => onSidebarPeekChange?.(false, 'sidebar')}
-    />
+    >
+      <button onClick={() => onSidebarPeekChange?.(true, 'menu')}>打开项目菜单</button>
+      <button onClick={() => onSidebarPeekChange?.(false, 'menu')}>关闭项目菜单</button>
+    </aside>
   ),
 }));
 
@@ -124,6 +127,20 @@ describe('MainLayout sidebar hover preview', () => {
     expect(screen.getByTestId('peek-trigger')).toHaveAttribute('data-peek-open', 'false');
   });
 
+  it('keeps the preview open for a project menu after the pointer leaves the sidebar', () => {
+    renderLayout();
+    const sidebar = screen.getByTestId('peek-sidebar');
+    fireEvent.pointerEnter(sidebar);
+    fireEvent.click(screen.getByRole('button', { name: '打开项目菜单' }));
+    fireEvent.pointerLeave(sidebar);
+    act(() => vi.advanceTimersByTime(300));
+    expect(sidebar).toHaveAttribute('data-peek-open', 'true');
+
+    fireEvent.click(screen.getByRole('button', { name: '关闭项目菜单' }));
+    act(() => vi.advanceTimersByTime(180));
+    expect(sidebar).toHaveAttribute('data-peek-open', 'false');
+  });
+
   it('closes once after leaving the only hover zone', () => {
     renderLayout();
 
diff --git a/tests/unit/sidebar-project-actions.test.tsx b/tests/unit/sidebar-project-actions.test.tsx
new file mode 100644
index 00000000..6d822906
--- /dev/null
+++ b/tests/unit/sidebar-project-actions.test.tsx
@@ -0,0 +1,144 @@
+import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { MemoryRouter, useLocation } from 'react-router-dom';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { Sidebar } from '@/components/layout/Sidebar';
+
+const projects = vi.hoisted(() => ['A', 'B'].map((name) => ({
+  id: `project-${name.toLowerCase()}`,
+  name,
+  createdAt: '2026-10-13T00:00:00.000Z',
+  updatedAt: '2026-10-13T00:00:00.000Z',
+  lastOpenedAt: '2026-10-13T00:00:00.000Z',
+})));
+const codingState = vi.hoisted(() => ({
+  projects,
+  activeProjectId: projects[0].id,
+  activeProject: projects[0],
+  load: vi.fn().mockResolvedValue(undefined),
+  setActiveProject: vi.fn(),
+  removeProject: vi.fn(),
+  createProject: vi.fn(),
+}));
+const projectConfigState = vi.hoisted(() => ({
+  load: vi.fn<(projectId: string) => Promise<unknown>>(),
+  remove: vi.fn(),
+}));
+const providerState = vi.hoisted(() => ({
+  refreshProviderSnapshot: vi.fn().mockResolvedValue(undefined),
+}));
+
+vi.mock('react-i18next', () => ({
+  useTranslation: () => ({ t: (_key: string, fallback: string) => fallback }),
+}));
+vi.mock('@/lib/api-client', () => ({ invokeIpc: vi.fn() }));
+vi.mock('@/hooks/use-current-user-profile', () => ({
+  useCurrentUserProfile: () => ({
+    userProfile: { displayName: '测试用户', avatarUrl: null },
+    profileRequired: false,
+    profileSyncError: null,
+    syncProfileNow: vi.fn().mockResolvedValue(undefined),
+  }),
+}));
+vi.mock('@/stores/auth', () => ({
+  useAuthStore: (selector: (state: unknown) => unknown) => selector({ user: null, logout: vi.fn() }),
+}));
+vi.mock('@/stores/settings', () => ({
+  useSettingsStore: (selector: (state: unknown) => unknown) => selector({ sidebarCollapsed: false }),
+}));
+vi.mock('@/stores/coding-workspace', () => ({
+  codingWorkspaceStore: { getState: () => codingState },
+  useCodingWorkspaceStore: (selector: (state: typeof codingState) => unknown) => selector(codingState),
+}));
+vi.mock('@/stores/project-config', () => ({
+  useProjectConfigStore: (selector: (state: typeof projectConfigState) => unknown) => selector(projectConfigState),
+}));
+vi.mock('@/stores/providers', () => ({
+  useProviderStore: (selector: (state: typeof providerState) => unknown) => selector(providerState),
+}));
+vi.mock('@/pages/Chat/CodingProjectConversations', () => ({
+  CodingProjectConversations: ({ archived }: { archived: boolean }) => (
+    <div data-testid="conversation-list-mode">{archived ? 'archived' : 'recent'}</div>
+  ),
+}));
+vi.mock('@/components/account/PointWallet', () => ({ PointWallet: () => null }));
+vi.mock('@/components/community/CommunityLink', () => ({ CommunityLink: () => null }));
+vi.mock('@/components/layout/ModuleSwitcher', () => ({ ModuleSwitcher: () => null }));
+vi.mock('@/components/layout/ImageWorkspaceSidebar', () => ({ ImageWorkspaceSidebar: () => null }));
+vi.mock('@/components/layout/SidebarUpdateButton', () => ({ SidebarUpdateButton: () => null }));
+vi.mock('@/components/profile/UserProfileDialog', () => ({ UserProfileDialog: () => null }));
+
+function LocationProbe() {
+  return <div data-testid="location">{useLocation().pathname}</div>;
+}
+
+async function renderSidebar() {
+  render(<MemoryRouter initialEntries={['/chat']}><Sidebar /><LocationProbe /></MemoryRouter>);
+  await act(async () => undefined);
+  projectConfigState.load.mockClear();
+}
+
+async function selectProjectAction(projectName: string, action: string) {
+  fireEvent.keyDown(screen.getByRole('button', { name: `项目操作：${projectName}` }), { key: 'Enter' });
+  fireEvent.click(await screen.findByRole('menuitem', { name: action }));
+}
+
+describe('Sidebar project actions', () => {
+  beforeEach(() => {
+    codingState.activeProjectId = projects[0].id;
+    codingState.activeProject = projects[0];
+    codingState.setActiveProject.mockReset();
+    codingState.setActiveProject.mockImplementation(async (projectId: string) => {
+      const project = projects.find((item) => item.id === projectId)!;
+      codingState.activeProjectId = projectId;
+      codingState.activeProject = project;
+      return project;
+    });
+    projectConfigState.load.mockReset();
+    projectConfigState.load.mockResolvedValue({ status: 'valid', config: {} });
+  });
+
+  it.each(['项目设置', '已归档对话'])('%s for the current project supersedes an earlier pending project open', async (action) => {
+    await renderSidebar();
+    let resolveProjectB!: (value: unknown) => void;
+    const pendingProjectB = new Promise((resolve) => { resolveProjectB = resolve; });
+    projectConfigState.load.mockImplementation((projectId) => projectId === projects[1].id
+      ? pendingProjectB
+      : Promise.resolve({ status: 'valid', config: {} }));
+
+    fireEvent.click(screen.getByRole('button', { name: '进入项目 B' }));
+    expect(projectConfigState.load).toHaveBeenCalledWith(projects[1].id);
+    expect(codingState.setActiveProject).not.toHaveBeenCalled();
+    await selectProjectAction('A', action);
+    await waitFor(() => {
+      if (action === '项目设置') expect(screen.getByTestId('location')).toHaveTextContent('/project-config');
+      else expect(screen.getByTestId('conversation-list-mode')).toHaveTextContent('archived');
+    });
+
+    await act(async () => {
+      resolveProjectB({ status: 'valid', config: {} });
+      await pendingProjectB;
+    });
+
+    expect(codingState.activeProjectId).toBe(projects[0].id);
+    expect(codingState.setActiveProject).not.toHaveBeenCalledWith(projects[1].id);
+    if (action === '项目设置') expect(screen.getByTestId('location')).toHaveTextContent('/project-config');
+    else {
+      expect(screen.getByTestId('location')).toHaveTextContent('/chat');
+      expect(screen.getByTestId('conversation-list-mode')).toHaveTextContent('archived');
+    }
+  });
+
+  it.each(['项目设置', '已归档对话'])('rejects %s for an inactive project with invalid configuration', async (action) => {
+    await renderSidebar();
+    projectConfigState.load.mockResolvedValue({ status: 'invalid', config: null, error: '配置文件无效' });
+
+    await selectProjectAction('B', action);
+
+    expect(await screen.findByRole('alertdialog')).toHaveTextContent('配置文件无效');
+    expect(projectConfigState.load).toHaveBeenCalledWith(projects[1].id);
+    expect(codingState.setActiveProject).not.toHaveBeenCalled();
+    expect(codingState.activeProjectId).toBe(projects[0].id);
+    expect(screen.getByTestId('location')).toHaveTextContent('/chat');
+    expect(screen.getByTestId('conversation-list-mode')).toHaveTextContent('recent');
+  });
+});