Restructure into modules/ with single-process CTP and config/ layout.

Move business code under modules/, env template to config/, PM2 single qihuo process, and _legacy shims for old imports.

Co-authored-by: Cursor <cursoragent@cursor.com>

modules/core/paths.py

@@ -0,0 +1,37 @@
+# Copyright (c) 2025-2026 马建军. All rights reserved.
+
+"""Repository layout paths — single source for config, data, uploads."""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+# .../qihuo/modules/core/paths.py -> repo root
+ROOT = Path(__file__).resolve().parents[2]
+
+CONFIG_DIR = ROOT / "config"
+ENV_FILE = CONFIG_DIR / ".env"
+LEGACY_ENV_FILE = ROOT / ".env"
+
+DATA_DIR = ROOT / "data"
+UPLOADS_DIR = ROOT / "uploads"
+LOGS_DIR = ROOT / "logs"
+
+DB_PATH = str(ROOT / "futures.db")
+
+
+def ensure_runtime_dirs() -> None:
+    DATA_DIR.mkdir(parents=True, exist_ok=True)
+    UPLOADS_DIR.mkdir(parents=True, exist_ok=True)
+    LOGS_DIR.mkdir(parents=True, exist_ok=True)
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def resolve_env_file() -> str:
+    """Prefer config/.env, fall back to legacy root .env."""
+    if ENV_FILE.is_file():
+        return str(ENV_FILE)
+    if LEGACY_ENV_FILE.is_file():
+        return str(LEGACY_ENV_FILE)
+    return str(ENV_FILE)