diff --git a/src/main/agent/runtime-controller.test.ts b/src/main/agent/runtime-controller.test.ts
index b97f600..dfa8181 100644
--- a/src/main/agent/runtime-controller.test.ts
+++ b/src/main/agent/runtime-controller.test.ts
@@ -135,6 +135,31 @@ describe('AgentRuntimeController', () => {
     await controller.dispose()
   })
 
+  it('forces runtime disposal when active work does not stop during shutdown', async () => {
+    const runtime = new TestRuntime(true)
+    const controller = new AgentRuntimeController(runtime, 1)
+    const stream = controller.run(
+      {
+        requestId: '1c608898-ecb7-4081-8174-2b6a52f53b12',
+        conversationId: 'conversation-shutdown',
+        prompt: 'test',
+        workMode: 'ask'
+      },
+      new AbortController().signal
+    )
+    const pendingEvent = stream.next()
+    await runtime.started
+
+    await controller.dispose()
+    expect(runtime.dispose).toHaveBeenCalledOnce()
+
+    runtime.finish()
+    await expect(pendingEvent).resolves.toMatchObject({
+      value: { type: 'text' }
+    })
+    await stream.return()
+  })
+
   it.each(['ask', 'plan'] as const)(
     'denies tool authorization in %s mode without prompting the user',
     async (workMode) => {
diff --git a/src/main/agent/runtime-controller.ts b/src/main/agent/runtime-controller.ts
index 2370eef..fea7665 100644
--- a/src/main/agent/runtime-controller.ts
+++ b/src/main/agent/runtime-controller.ts
@@ -22,7 +22,10 @@ export class AgentRuntimeController implements AgentRuntime {
   private replacementQueue: Promise<void> = Promise.resolve()
   private closing = false
 
-  constructor(runtime: AgentRuntime) {
+  constructor(
+    runtime: AgentRuntime,
+    private readonly shutdownGraceMs = 2_000
+  ) {
     this.current = {
       runtime,
       activeRequests: 0,
@@ -212,9 +215,21 @@ export class AgentRuntimeController implements AgentRuntime {
 
   async dispose(): Promise<void> {
     this.closing = true
-    const operation = this.replacementQueue.then(() =>
-      this.retire(this.current)
-    )
+    const operation = this.replacementQueue.then(async () => {
+      const slot = this.current
+      const disposal = this.retire(slot)
+      if (slot.activeRequests === 0) {
+        return disposal
+      }
+      await Promise.race([
+        disposal,
+        new Promise<void>((resolve) =>
+          setTimeout(resolve, this.shutdownGraceMs)
+        )
+      ])
+      await this.disposeSlot(slot)
+      return disposal
+    })
     this.replacementQueue = operation.catch(() => undefined)
     await operation
   }
diff --git a/src/main/assistant/assistant-database.test.ts b/src/main/assistant/assistant-database.test.ts
index 8876ccc..cdb308e 100644
--- a/src/main/assistant/assistant-database.test.ts
+++ b/src/main/assistant/assistant-database.test.ts
@@ -2,12 +2,13 @@ import { mkdtemp, rm } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { DatabaseSync } from 'node:sqlite'
-import { afterEach, describe, expect, it } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
 import { AssistantDatabase } from './assistant-database'
 
 const temporaryDirectories: string[] = []
 
 afterEach(async () => {
+  vi.useRealTimers()
   await Promise.all(
     temporaryDirectories.splice(0).map((directory) =>
       rm(directory, { recursive: true, force: true })
@@ -52,6 +53,49 @@ describe('AssistantDatabase', () => {
     unchanged.close()
   })
 
+  it('lists projects by creation time with newer projects last', async () => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date('2026-08-07T00:00:00.000Z'))
+    const database = await createDatabase()
+    const defaultProject = database.listProjects()[0]!
+
+    vi.setSystemTime(new Date('2026-08-07T00:01:00.000Z'))
+    const secondProject = database.createProject({
+      name: '第二项目',
+      description: '',
+      rootPath: 'C:\\Second',
+      defaultWorkMode: 'ask'
+    })
+    vi.setSystemTime(new Date('2026-08-07T00:02:00.000Z'))
+    const thirdProject = database.createProject({
+      name: '第三项目',
+      description: '',
+      rootPath: 'C:\\Third',
+      defaultWorkMode: 'execute'
+    })
+
+    database.updateProject(secondProject.id, {
+      name: '第二项目（已更新）',
+      description: '',
+      rootPath: 'C:\\Second',
+      defaultWorkMode: 'ask'
+    })
+
+    expect(database.listProjects().map((project) => project.id)).toEqual([
+      defaultProject.id,
+      secondProject.id,
+      thirdProject.id
+    ])
+    expect(
+      database.listProjects(true).map((project) => project.id)
+    ).toEqual([
+      defaultProject.id,
+      secondProject.id,
+      thirdProject.id
+    ])
+    database.close()
+  })
+
   it('migrates existing databases to schema version 8', async () => {
     const directory = await mkdtemp(
       join(tmpdir(), 'goodbuddy-assistant-migration-')
diff --git a/src/main/assistant/assistant-database.ts b/src/main/assistant/assistant-database.ts
index 11bd905..d3a7a61 100644
--- a/src/main/assistant/assistant-database.ts
+++ b/src/main/assistant/assistant-database.ts
@@ -806,10 +806,11 @@ export class AssistantDatabase {
     const rows = database
       .prepare(
         includeArchived
-          ? 'SELECT * FROM projects ORDER BY updated_at DESC'
+          ? `SELECT * FROM projects
+             ORDER BY created_at ASC, rowid ASC`
           : `SELECT * FROM projects
              WHERE status = 'active'
-             ORDER BY updated_at DESC`
+             ORDER BY created_at ASC, rowid ASC`
       )
       .all() as ProjectRow[]
     return rows.map(toProject)
diff --git a/src/main/index.ts b/src/main/index.ts
index ea43b7d..c091161 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -60,6 +60,7 @@ import { EmbeddingIndexCoordinator } from './knowledge/embedding-index-coordinat
 import { KnowledgeEmbeddingIndexRepository } from './knowledge/knowledge-embedding-index-repository'
 import { GlobalTlsPolicy } from './global-tls-policy'
 import type { AgentRuntimeSelection } from '../shared/runtime-selection-contracts'
+import { waitForCleanup } from './shutdown'
 
 const shortcut = 'CommandOrControl+Shift+Space'
 const portableUserDataPath = resolvePortableUserDataPath({
@@ -485,21 +486,25 @@ app.on('before-quit', (event) => {
   cleanupStarted = true
   void (async () => {
     try {
-      await Promise.allSettled([removeIpcHandlers?.()])
+      const cleanup = Promise.allSettled([
+        Promise.resolve().then(() => removeIpcHandlers?.()),
+        Promise.resolve().then(() => runtime?.dispose()),
+        Promise.resolve().then(() => selectedRuntimeManager?.dispose()),
+        Promise.resolve().then(() => knowledgeGateway?.dispose()),
+        Promise.resolve().then(() => knowledgeService?.dispose()),
+        Promise.resolve().then(() => browserService?.dispose()),
+        Promise.resolve().then(() => globalTlsPolicy?.dispose())
+      ])
       globalShortcut.unregisterAll()
       tray?.destroy()
-      await Promise.allSettled([
-        runtime?.dispose(),
-        selectedRuntimeManager?.dispose(),
-        knowledgeGateway?.dispose(),
-        knowledgeService?.dispose(),
-        browserService?.dispose(),
-        globalTlsPolicy?.dispose()
-      ])
+      await waitForCleanup(cleanup, 8_000)
     } finally {
-      assistantDatabase?.close()
-      cleanupComplete = true
-      app.quit()
+      try {
+        assistantDatabase?.close()
+      } finally {
+        cleanupComplete = true
+        app.exit(0)
+      }
     }
   })()
 })
diff --git a/src/main/ipc.ts b/src/main/ipc.ts
index e06da5c..de13264 100644
--- a/src/main/ipc.ts
+++ b/src/main/ipc.ts
@@ -2941,12 +2941,11 @@ export function registerIpcHandlers(
 
   return async () => {
     shuttingDown = true
-    await Promise.allSettled(
-      [
-        ...channelServices.map((service) => service.stop()),
-        channelManager?.stopAll()
-      ]
-    )
+    const channelCleanup = Promise.allSettled([
+      ...channelServices.map((service) => service.stop()),
+      channelManager?.stopAll()
+    ])
+    const subagentCleanup = subagentService?.dispose()
     removeBrowserStateListener?.()
     removeEmbeddingStatusListener?.()
     clearInterval(scheduleInterval)
@@ -2957,21 +2956,26 @@ export function registerIpcHandlers(
     }
     heartbeatControllers.clear()
     speechTranscriptionService?.dispose()
-    if (speechModelManager) {
-      for (const operation of (await speechModelManager.getSnapshot()).operations) {
-        speechModelManager.cancel(operation.modelId)
-      }
-    }
+    const speechModelCleanup = speechModelManager
+      ?.getSnapshot()
+      .then((snapshot) => {
+        for (const operation of snapshot.operations) {
+          speechModelManager.cancel(operation.modelId)
+        }
+      })
     embeddingIndexCoordinator?.cancel()
     approvalBroker.clear()
     contextManager.clear()
-    subagentService?.cancelAll('应用正在退出')
-    await Promise.allSettled([...activeExecutions])
-    await subagentService?.dispose()
     window.removeListener('maximize', notifyMaximizedChanged)
     window.removeListener('unmaximize', notifyMaximizedChanged)
     for (const channel of channels) {
       ipcMain.removeHandler(channel)
     }
+    await Promise.allSettled([
+      channelCleanup,
+      speechModelCleanup,
+      subagentCleanup,
+      ...activeExecutions
+    ])
   }
 }
diff --git a/src/main/shutdown.test.ts b/src/main/shutdown.test.ts
new file mode 100644
index 0000000..2f85e3f
--- /dev/null
+++ b/src/main/shutdown.test.ts
@@ -0,0 +1,26 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { waitForCleanup } from './shutdown'
+
+afterEach(() => {
+  vi.useRealTimers()
+})
+
+describe('waitForCleanup', () => {
+  it('reports completed and failed cleanup as settled', async () => {
+    await expect(
+      waitForCleanup(Promise.resolve(), 100)
+    ).resolves.toBe(true)
+    await expect(
+      waitForCleanup(Promise.reject(new Error('cleanup failed')), 100)
+    ).resolves.toBe(true)
+  })
+
+  it('stops waiting after the shutdown deadline', async () => {
+    vi.useFakeTimers()
+    const result = waitForCleanup(new Promise(() => {}), 100)
+
+    await vi.advanceTimersByTimeAsync(100)
+
+    await expect(result).resolves.toBe(false)
+  })
+})
diff --git a/src/main/shutdown.ts b/src/main/shutdown.ts
new file mode 100644
index 0000000..be6669c
--- /dev/null
+++ b/src/main/shutdown.ts
@@ -0,0 +1,18 @@
+export async function waitForCleanup(
+  cleanup: Promise<unknown>,
+  timeoutMs: number
+): Promise<boolean> {
+  let timeout: NodeJS.Timeout | undefined
+  const timedOut = new Promise<false>((resolve) => {
+    timeout = setTimeout(() => resolve(false), timeoutMs)
+  })
+  const settled = Promise.resolve(cleanup).then(
+    () => true as const,
+    () => true as const
+  )
+  const completed = await Promise.race([settled, timedOut])
+  if (timeout) {
+    clearTimeout(timeout)
+  }
+  return completed
+}
diff --git a/src/renderer/src/App.test.tsx b/src/renderer/src/App.test.tsx
index 835cdae..0f6cc62 100644
--- a/src/renderer/src/App.test.tsx
+++ b/src/renderer/src/App.test.tsx
@@ -1723,6 +1723,58 @@ describe('App', () => {
     )
   })
 
+  it('restores and persists the last active project', async () => {
+    const secondProject = {
+      ...project,
+      id: '00000000-0000-4000-8000-000000000102',
+      name: '第二项目',
+      rootPath: 'C:\\Second',
+      defaultWorkMode: 'execute' as const
+    }
+    vi.mocked(api.projects.list).mockResolvedValueOnce([
+      project,
+      secondProject
+    ])
+    localStorage.setItem(
+      'goodbuddy.active-project.v1',
+      secondProject.id
+    )
+
+    render(<App />)
+
+    expect(await screen.findByLabelText('当前项目')).toHaveValue(
+      secondProject.id
+    )
+    expect(screen.getByLabelText('工作模式')).toHaveValue('execute')
+
+    fireEvent.change(screen.getByLabelText('当前项目'), {
+      target: { value: project.id }
+    })
+    await waitFor(() =>
+      expect(
+        localStorage.getItem('goodbuddy.active-project.v1')
+      ).toBe(project.id)
+    )
+  })
+
+  it('falls back when the last active project is no longer available', async () => {
+    localStorage.setItem(
+      'goodbuddy.active-project.v1',
+      '00000000-0000-4000-8000-000000000999'
+    )
+
+    render(<App />)
+
+    expect(await screen.findByLabelText('当前项目')).toHaveValue(
+      project.id
+    )
+    await waitFor(() =>
+      expect(
+        localStorage.getItem('goodbuddy.active-project.v1')
+      ).toBe(project.id)
+    )
+  })
+
   it.each([
     ['opencode', 'OpenCode'],
     ['continue', 'Continue CLI']
diff --git a/src/renderer/src/App.tsx b/src/renderer/src/App.tsx
index f8b64ba..978ec96 100644
--- a/src/renderer/src/App.tsx
+++ b/src/renderer/src/App.tsx
@@ -352,6 +352,8 @@ const emptyTokenUsage: TokenUsageSummary = {
 
 const storageKey = 'goodbuddy.conversations.v1'
 
+const activeProjectStorageKey = 'goodbuddy.active-project.v1'
+
 const quickActions = [
   {
     title: '总结一段内容',
@@ -644,6 +646,14 @@ function loadConversations(): Conversation[] {
   }
 }
 
+function loadActiveProjectId(): string | undefined {
+  try {
+    return localStorage.getItem(activeProjectStorageKey) || undefined
+  } catch {
+    return undefined
+  }
+}
+
 function isConversation(value: unknown): value is Conversation {
   if (!value || typeof value !== 'object') {
     return false
@@ -2200,6 +2210,13 @@ function App(): React.JSX.Element {
 
   useEffect(() => {
     activeProjectIdRef.current = activeProjectId
+    if (activeProjectId) {
+      try {
+        localStorage.setItem(activeProjectStorageKey, activeProjectId)
+      } catch {
+        // The project selection still works when persistence is unavailable.
+      }
+    }
   }, [activeProjectId])
 
   useEffect(() => {
@@ -2238,7 +2255,11 @@ function App(): React.JSX.Element {
         if (!active || value.length === 0) {
           return
         }
-        const project = value[0]!
+        const lastActiveProjectId = loadActiveProjectId()
+        const project =
+          value.find(
+            (candidate) => candidate.id === lastActiveProjectId
+          ) ?? value[0]!
         setProjects(value)
         setActiveProjectId(project.id)
         setWorkMode(