fix(release): prevent frozen backend worker relaunch during key scan

Author: 2977094657

desktop/package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "wechat-data-analysis-desktop",
   "private": true,
-  "version": "1.11.2",
+  "version": "1.11.3",
   "main": "src/main.cjs",
   "scripts": {
     "dev": "node scripts/dev.cjs",

desktop/package.json

@@ -8,9 +8,15 @@
 默认在10392端口启动API服务
 """
 
-import uvicorn
+import multiprocessing
 import os
 from pathlib import Path
+
+# Keep standalone/frozen launches safe when scanner code uses multiprocessing.
+if __name__ == "__main__":
+    multiprocessing.freeze_support()
+
+import uvicorn
 from wechat_decrypt_tool.network_access import get_lan_access_host
 from wechat_decrypt_tool.runtime_settings import read_effective_backend_host, read_effective_backend_port
 

main.py

@@ -1,6 +1,6 @@
 [project]
 name = "wechat-decrypt-tool"
-version = "1.11.2"
+version = "1.11.3"
 description = "Modern WeChat database decryption tool with React frontend"
 readme = "README.md"
 requires-python = ">=3.11"

pyproject.toml

@@ -1,5 +1,5 @@
 """微信数据库解密工具
 """
 
-__version__ = "1.11.1"
+__version__ = "1.11.3"
 __author__ = "WeChat Decrypt Tool"

src/wechat_decrypt_tool/__init__.py

@@ -4,8 +4,16 @@
 cannot detect reliably.
 """
 
+import multiprocessing
 import os
 
+# PyInstaller/frozen Windows builds re-launch this executable for
+# multiprocessing workers.  The memory/DLL key scanners use process pools; if
+# we import and start the FastAPI app before freeze_support() has a chance to
+# divert worker processes, every worker tries to bind the backend port again.
+if __name__ == "__main__":
+    multiprocessing.freeze_support()
+
 import uvicorn
 
 from wechat_decrypt_tool.api import app

src/wechat_decrypt_tool/backend_entry.py

@@ -18,6 +18,7 @@
 import random
 import logging
 import asyncio
+import importlib
 import httpx
 from pathlib import Path
 from typing import Optional, List, Dict, Any
@@ -440,7 +441,7 @@ def _get_db_key_with_v4(
         candidate_plan.extend((candidate, "scan.py") for candidate in scan_candidates)
 
     try:
-        from . import key_v4 as key_v4_module
+        key_v4_module = importlib.import_module(".key_v4", __package__)
     except Exception as e:
         raise RuntimeError(f"包内 key_v4.py 加载失败: {e}") from e