初始提交：识流 AI 助手项目

微信自动回复机器人，基于截图+OCR识别消息，支持关键词规则和 AI（OpenAI/DeepSeek/Dify）自动回复。
技术栈：PySide6 + Flask + Vue3 + RapidOCR + SQLite

注：OCR大模型文件（.onnx / .pdiparams）不纳入版本控制，需单独下载。

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backend_main.py

@@ -0,0 +1,46 @@
+import os
+import sys
+from pathlib import Path
+
+from app.application.services import AppConfig
+from app.infrastructure.backend import start_backend
+
+PROJECT_ROOT = Path(__file__).resolve().parent
+VENV_ROOT = PROJECT_ROOT / ".venv"
+VENV_DIR = VENV_ROOT / "Scripts"
+VENV_PYTHON = VENV_DIR / "python.exe"
+
+
+def _resolve(path):
+    try:
+        return Path(path).resolve()
+    except Exception:
+        return None
+
+
+def _running_in_project_venv():
+    current_prefix = _resolve(sys.prefix)
+    if current_prefix == _resolve(VENV_ROOT):
+        return True
+    current_executable = _resolve(sys.executable)
+    return current_executable == _resolve(VENV_PYTHON)
+
+
+def ensure_project_venv():
+    if _running_in_project_venv():
+        return
+    if os.environ.get("OPENCLAW_PROJECT_VENV_REEXEC") == "1":
+        raise RuntimeError("重启后仍未进入项目 .venv，请检查 .venv 是否损坏")
+    if not VENV_PYTHON.exists():
+        raise RuntimeError(f"未找到项目 .venv 解释器: {VENV_PYTHON}")
+    os.environ["OPENCLAW_PROJECT_VENV_REEXEC"] = "1"
+    os.chdir(str(PROJECT_ROOT))
+    os.execv(str(VENV_PYTHON), [str(VENV_PYTHON), str(PROJECT_ROOT / "backend_main.py")])
+
+
+ensure_project_venv()
+
+
+if __name__ == "__main__":
+    config = AppConfig()
+    start_backend(host=config.host, port=config.port)