添加动图支持，优化图片和视频上传逻辑，调整超时设置，增强评论时间格式化

app/api/fetcher/browser.ts

@@ -9,10 +9,18 @@ let refCount = 0
 let idleCloseTimer: NodeJS.Timeout | null = null
 
 const USER_DATA_DIR = 'chrome-profile/douyin'
-const DEFAULT_OPTIONS = { headless: true } as const
 
 async function launchContext(): Promise<BrowserContext> {
-  const ctx = await chromium.launchPersistentContext(USER_DATA_DIR, DEFAULT_OPTIONS)
+  const ctx = await chromium.launchPersistentContext(
+    USER_DATA_DIR,
+    {
+      headless: Boolean(process.env.CHROMIUM_HEADLESS ?? 'false'),
+      viewport: {
+        width: Number(process.env.CHROMIUM_VIEWPORT_WIDTH ?? 1280),
+        height: Number(process.env.CHROMIUM_VIEWPORT_HEIGHT ?? 1080)
+      }
+    }
+  )
   // When the context is closed externally, reset manager state
   ctx.on('close', () => {
     context = null