fix: prevent browser process leaks and improve robustness

- fix(browser): wrap context lifecycle in try/finally to ensure browser
  closes on exceptions and KeyboardInterrupt (login, sniffer, generator)
- fix(browser): replace time.sleep with Playwright native waits
  (wait_for, wait_for_timeout) for more reliable element interaction
- fix(browser): use parameterized page.evaluate instead of f-string
  JS injection in generator polling
- fix(api): add retry logic in wait_for_completion to survive transient
  network errors
- fix(config): add prepare_profile_dir to copy profile to temp dir,
  preventing Chromium SingletonLock conflicts when tools run concurrently
- fix(sniffer): stream API logs to tempfile instead of unbounded memory
  list to avoid OOM
- fix(api): specify encoding='utf-8' when loading cookies from file

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

hunyuan3dweb/api.py

@@ -190,8 +190,15 @@ class Hunyuan3DAPI:
             完成的创作信息
         """
         start_time = time.time()
+        last_error = None
         while time.time() - start_time < timeout:
-            status = self.get_generation_status(creation_id)
+            try:
+                status = self.get_generation_status(creation_id)
+            except Exception as e:
+                last_error = e
+                print(f"查询状态失败: {e}，将在 {poll_interval} 秒后重试...")
+                time.sleep(poll_interval)
+                continue
 
             # Handle both wrapped {code, data} and flat response formats
             if "code" in status:
@@ -209,6 +216,8 @@ class Hunyuan3DAPI:
 
             time.sleep(poll_interval)
 
+        if last_error:
+            raise TimeoutError(f"Generation timeout after {timeout} seconds. Last error: {last_error}")
         raise TimeoutError(f"Generation timeout after {timeout} seconds")
 
 
@@ -217,7 +226,7 @@ from .config import get_cookie_path
 def load_cookies_from_file(filepath: Optional[str] = None) -> str:
     """从文件加载Cookie，默认读取用户配置目录的 cookies.txt"""
     path = filepath or str(get_cookie_path())
-    with open(path, 'r') as f:
+    with open(path, 'r', encoding='utf-8') as f:
         return f.read().strip()