diff --git a/apps/desktop-client/package.json b/apps/desktop-client/package.json
index f13d0ea..4b192c2 100644
--- a/apps/desktop-client/package.json
+++ b/apps/desktop-client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@geo/desktop-client",
-  "version": "0.1.2",
+  "version": "0.1.1",
   "private": true,
   "description": "省心推客户端 — 连接和管理您的媒体账号，轻松发布和监控内容表现。",
   "author": {
diff --git a/apps/desktop-client/src/main/app-settings.ts b/apps/desktop-client/src/main/app-settings.ts
index 6a75a51..d81a61a 100644
--- a/apps/desktop-client/src/main/app-settings.ts
+++ b/apps/desktop-client/src/main/app-settings.ts
@@ -19,7 +19,7 @@ interface DesktopAppInternalFlags {
 const DEFAULT_DESKTOP_APP_SETTINGS: DesktopAppSettings = {
   openAtLogin: false,
   keepRunningInBackground: true,
-  autoCleanStorageWeekly: false,
+  autoCleanStorageWeekly: true,
 }
 
 const DEFAULT_INTERNAL_FLAGS: DesktopAppInternalFlags = {
diff --git a/apps/desktop-client/src/main/bootstrap.ts b/apps/desktop-client/src/main/bootstrap.ts
index fe3f60a..bf2b78e 100644
--- a/apps/desktop-client/src/main/bootstrap.ts
+++ b/apps/desktop-client/src/main/bootstrap.ts
@@ -166,6 +166,7 @@ let loginWindow: ElectronBrowserWindow | null = null
 let settingsWindow: ElectronBrowserWindow | null = null
 let mainRendererContents: ElectronWebContents | null = null
 let quitReleaseInFlight = false
+let quitAfterSaasLogoutPromise: Promise<void> | null = null
 let mainWindowCreatePromise: Promise<ElectronBrowserWindow> | null = null
 let loginWindowCreatePromise: Promise<ElectronBrowserWindow> | null = null
 let settingsWindowCreatePromise: Promise<ElectronBrowserWindow> | null = null
@@ -516,6 +517,36 @@ function revealActiveWindowSafely(source: string): void {
   })
 }
 
+function timeout(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms))
+}
+
+function quitAfterClearingSaasSession(): void {
+  if (quitAfterSaasLogoutPromise) {
+    return
+  }
+
+  quitAfterSaasLogoutPromise = (async () => {
+    currentWindowMode = 'login'
+    persistWindowMode('login')
+
+    // Only clear the Shengxintui SaaS session. Bound media/AI account browser
+    // partitions are intentionally preserved so the same account can reuse them
+    // after signing in again.
+    await Promise.race([clearRendererDesktopSessions(), timeout(1000)])
+    await Promise.race([releaseRuntimeSession(), timeout(1500)])
+  })()
+    .catch((error) => {
+      console.warn('[desktop-main] quit after clearing saas session failed', {
+        message: error instanceof Error ? error.message : String(error),
+      })
+    })
+    .finally(() => {
+      quitReleaseInFlight = true
+      app.quit()
+    })
+}
+
 function windowFromIpcEvent(event: IpcMainInvokeEvent): ElectronBrowserWindow | null {
   const window = BrowserWindow.fromWebContents(event.sender)
   if (!window || window.isDestroyed()) {
@@ -1190,9 +1221,14 @@ if (!hasSingleInstanceLock) {
         mainRendererContents.send('desktop:runtime-invalidated', event)
       })
       await queueWindowModeSwitch(currentWindowMode)
-      initTray(() => {
-        revealActiveWindowSafely('tray')
-      })
+      initTray(
+        () => {
+          revealActiveWindowSafely('tray')
+        },
+        () => {
+          quitAfterClearingSaasSession()
+        },
+      )
       startDesktopHealthIndicator(() => currentMainWindow())
       queueDesktopDeepLink(extractDesktopDeepLink(process.argv))
       flushPendingDesktopDeepLinks()
diff --git a/apps/desktop-client/src/main/tray.ts b/apps/desktop-client/src/main/tray.ts
index 7c9a867..d75aeff 100644
--- a/apps/desktop-client/src/main/tray.ts
+++ b/apps/desktop-client/src/main/tray.ts
@@ -1,6 +1,6 @@
 import { nativeImage } from 'electron/common'
 import type { Tray as ElectronTray } from 'electron/main'
-import { Menu, Tray, app } from 'electron/main'
+import { Menu, Tray } from 'electron/main'
 
 import { TRAY_DANGER_ICON_BASE64, TRAY_ICON_BASE64, TRAY_WINDOWS_ICON_BASE64 } from './brand-icons'
 
@@ -84,7 +84,7 @@ export function updateTrayIssueIndicator(issueCount: number): void {
   tray.setToolTip(hasIssues ? `省心推 · ${safeCount} 个账号健康问题` : '省心推')
 }
 
-export function initTray(onOpen: () => void): ElectronTray {
+export function initTray(onOpen: () => void, onQuit: () => void): ElectronTray {
   if (tray) {
     return tray
   }
@@ -95,7 +95,7 @@ export function initTray(onOpen: () => void): ElectronTray {
     Menu.buildFromTemplate([
       { label: '打开省心推', click: () => onOpen() },
       { type: 'separator' },
-      { label: '退出省心推', click: () => app.quit() },
+      { label: '退出省心推', click: () => onQuit() },
     ]),
   )
   tray.on('click', () => onOpen())
diff --git a/apps/desktop-client/src/renderer/views/SettingsView.vue b/apps/desktop-client/src/renderer/views/SettingsView.vue
index 59b570f..1e37658 100644
--- a/apps/desktop-client/src/renderer/views/SettingsView.vue
+++ b/apps/desktop-client/src/renderer/views/SettingsView.vue
@@ -56,7 +56,7 @@ const activeSection = ref<SectionKey>('general')
 const appSettings = ref<DesktopAppSettings>({
   openAtLogin: false,
   keepRunningInBackground: true,
-  autoCleanStorageWeekly: false,
+  autoCleanStorageWeekly: true,
 })
 const serverBaseURL = ref(apiBaseURL.value)
 const settingsLoaded = ref(false)
diff --git a/apps/ops-web/src/views/DesktopClientReleasesView.vue b/apps/ops-web/src/views/DesktopClientReleasesView.vue
index 2b0a7dd..5d003af 100644
--- a/apps/ops-web/src/views/DesktopClientReleasesView.vue
+++ b/apps/ops-web/src/views/DesktopClientReleasesView.vue
@@ -623,6 +623,9 @@ function uploadButtonText(kind: 'installer' | 'updater') {
   if (isUploading && typeof progress === 'number' && progress < 100) {
     return `上传中 ${progress}%`
   }
+  if (isUploading && progress === 100) {
+    return '校验并写入 OSS...'
+  }
   if (isUploading) {
     return '写入 OSS...'
   }
diff --git a/server/internal/shared/objectstorage/aliyun.go b/server/internal/shared/objectstorage/aliyun.go
index 712c903..2adaddd 100644
--- a/server/internal/shared/objectstorage/aliyun.go
+++ b/server/internal/shared/objectstorage/aliyun.go
@@ -92,7 +92,7 @@ func (c *aliyunClient) PutReader(
 		return fmt.Errorf("object reader is required")
 	}
 
-	exists, err := c.client.IsBucketExist(c.bucket)
+	exists, err := c.bucketExists(ctx)
 	if err != nil {
 		c.logError(ctx, "aliyun bucket exists check failed",
 			zap.String("bucket", c.bucket),
@@ -102,7 +102,7 @@ func (c *aliyunClient) PutReader(
 		return fmt.Errorf("check aliyun bucket: %w", err)
 	}
 	if !exists {
-		if err := c.client.CreateBucket(c.bucket); err != nil {
+		if err := c.client.CreateBucket(c.bucket, oss.WithContext(ctx)); err != nil {
 			c.logError(ctx, "aliyun create bucket failed",
 				zap.String("bucket", c.bucket),
 				zap.String("object_key", objectKey),
@@ -126,6 +126,7 @@ func (c *aliyunClient) PutReader(
 	if err != nil {
 		return err
 	}
+	options = append(options, oss.WithContext(ctx))
 	if err := bucket.PutObject(objectKey, reader, options...); err != nil {
 		c.logError(ctx, "aliyun put object failed",
 			zap.String("bucket", c.bucket),
@@ -144,6 +145,14 @@ func (c *aliyunClient) PutReader(
 	return nil
 }
 
+func (c *aliyunClient) bucketExists(ctx context.Context) (bool, error) {
+	listRes, err := c.client.ListBuckets(oss.Prefix(c.bucket), oss.MaxKeys(1), oss.WithContext(ctx))
+	if err != nil {
+		return false, err
+	}
+	return len(listRes.Buckets) == 1 && listRes.Buckets[0].Name == c.bucket, nil
+}
+
 func aliyunPutObjectOptions(cfg config.ObjectStorageConfig, contentType string) ([]oss.Option, error) {
 	options := []oss.Option{oss.ContentType(contentType)}
 	acl := strings.ToLower(strings.TrimSpace(cfg.ObjectACL))
@@ -200,7 +209,7 @@ func (c *aliyunClient) GetBytes(ctx context.Context, objectKey string) ([]byte,
 		return nil, fmt.Errorf("get aliyun bucket: %w", err)
 	}
 
-	reader, err := bucket.GetObject(objectKey)
+	reader, err := bucket.GetObject(objectKey, oss.WithContext(ctx))
 	if err != nil {
 		c.logError(ctx, "aliyun get object failed",
 			zap.String("bucket", c.bucket),
@@ -255,7 +264,7 @@ func (c *aliyunClient) Exists(ctx context.Context, objectKey string) (bool, erro
 		return false, fmt.Errorf("get aliyun bucket: %w", err)
 	}
 
-	exists, err := bucket.IsObjectExist(objectKey)
+	exists, err := bucket.IsObjectExist(objectKey, oss.WithContext(ctx))
 	if err != nil {
 		c.logError(ctx, "aliyun stat object failed",
 			zap.String("bucket", c.bucket),
@@ -285,7 +294,7 @@ func (c *aliyunClient) Delete(ctx context.Context, objectKey string) error {
 		return fmt.Errorf("get aliyun bucket: %w", err)
 	}
 
-	if err := bucket.DeleteObject(objectKey); err != nil {
+	if err := bucket.DeleteObject(objectKey, oss.WithContext(ctx)); err != nil {
 		c.logError(ctx, "aliyun delete object failed",
 			zap.String("bucket", c.bucket),
 			zap.String("object_key", objectKey),
@@ -336,7 +345,7 @@ func (c *aliyunClient) Usage(ctx context.Context) (*UsageInfo, error) {
 	if err := c.Validate(); err != nil {
 		return nil, err
 	}
-	stat, err := c.client.GetBucketStat(c.bucket)
+	stat, err := c.client.GetBucketStat(c.bucket, oss.WithContext(ctx))
 	if err != nil {
 		c.logError(ctx, "aliyun get bucket stat failed",
 			zap.String("bucket", c.bucket),
@@ -382,6 +391,7 @@ func (c *aliyunClient) List(ctx context.Context, in ListInput) (*ListResult, err
 	if startAfter := normalizeObjectKeyPath(in.StartAfter); startAfter != "" {
 		options = append(options, oss.StartAfter(startAfter))
 	}
+	options = append(options, oss.WithContext(ctx))
 
 	result, err := bucket.ListObjectsV2(options...)
 	if err != nil {
@@ -426,7 +436,7 @@ func (c *aliyunClient) Stat(ctx context.Context, objectKey string) (*ObjectInfo,
 	if err != nil {
 		return nil, fmt.Errorf("get aliyun bucket: %w", err)
 	}
-	header, err := bucket.GetObjectDetailedMeta(objectKey)
+	header, err := bucket.GetObjectDetailedMeta(objectKey, oss.WithContext(ctx))
 	if err != nil {
 		c.logError(ctx, "aliyun stat object failed",
 			zap.String("bucket", c.bucket),
@@ -457,7 +467,7 @@ func (c *aliyunClient) Copy(ctx context.Context, sourceKey, destinationKey strin
 	if err != nil {
 		return fmt.Errorf("get aliyun bucket: %w", err)
 	}
-	if _, err := bucket.CopyObject(sourceKey, destinationKey); err != nil {
+	if _, err := bucket.CopyObject(sourceKey, destinationKey, oss.WithContext(ctx)); err != nil {
 		c.logError(ctx, "aliyun copy object failed",
 			zap.String("bucket", c.bucket),
 			zap.String("source_key", sourceKey),
diff --git a/server/internal/shared/objectstorage/aliyun_test.go b/server/internal/shared/objectstorage/aliyun_test.go
index 6635286..abdc999 100644
--- a/server/internal/shared/objectstorage/aliyun_test.go
+++ b/server/internal/shared/objectstorage/aliyun_test.go
@@ -1,7 +1,11 @@
 package objectstorage
 
 import (
+	"context"
+	"net/http"
+	"net/http/httptest"
 	"testing"
+	"time"
 
 	"github.com/geo-platform/tenant-api/internal/shared/config"
 )
@@ -34,6 +38,61 @@ func TestAliyunPutObjectOptionsRejectsUnsupportedObjectACL(t *testing.T) {
 	}
 }
 
+func TestAliyunExistsHonorsContextCancellation(t *testing.T) {
+	t.Parallel()
+
+	requestStarted := make(chan struct{})
+	blockRequest := make(chan struct{})
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		select {
+		case <-requestStarted:
+		default:
+			close(requestStarted)
+		}
+		<-blockRequest
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer func() {
+		close(blockRequest)
+		server.Close()
+	}()
+
+	client := NewAliyunClient(config.ObjectStorageConfig{
+		Provider:  "aliyun",
+		Endpoint:  server.URL,
+		AccessKey: "test-access-key",
+		SecretKey: "test-secret-key",
+		Bucket:    "test-bucket",
+		Region:    "cn-test",
+	}, nil)
+	ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond)
+	defer cancel()
+
+	started := make(chan struct{})
+	done := make(chan error, 1)
+	go func() {
+		close(started)
+		_, err := client.Exists(ctx, "desktop-client/releases/test.dmg")
+		done <- err
+	}()
+	<-started
+
+	select {
+	case <-requestStarted:
+	case <-time.After(time.Second):
+		t.Fatal("expected aliyun request to reach the test server")
+	}
+
+	select {
+	case err := <-done:
+		if err == nil {
+			t.Fatal("expected context cancellation error")
+		}
+	case <-time.After(2 * time.Second):
+		t.Fatal("aliyun Exists did not honor context cancellation")
+	}
+}
+
 func TestIsPublicReadACL(t *testing.T) {
 	t.Parallel()