feat: add Evotor OAuth connection feature with formatted phone input

- Add EvotorConnection model to store user's Evotor access tokens
- Implement OAuth 2.0 flow: /evotor (view), /evotor/connect, /evotor/callback, /evotor/disconnect
- Add Evotor connection page with connected/disconnected states
- Implement phone input masking (+7 (XXX) XXX-XX-XX) using Inputmask
- Add Russian validation messages for form fields
- Update phone validator to match masked format
- Add httpx dependency for async OAuth token exchange
- Add Evotor settings to config: CLIENT_ID, CLIENT_SECRET, SCOPES

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

web/config.py

@@ -7,6 +7,16 @@ class Settings(BaseSettings):
     BASE_URL: str = "http://localhost:8000"
     PASSWORD_RESET_EXPIRE_MINUTES: int = 60
 
+    EVOTOR_CLIENT_ID: str = ""
+    EVOTOR_CLIENT_SECRET: str = ""
+    EVOTOR_SCOPES: str = "store:read product:read"
+
+    # Docker compose vars (ignored in app, kept for env compatibility)
+    DB_ROOT_PASSWORD: str = ""
+    DB_NAME: str = ""
+    DB_USER: str = ""
+    DB_PASSWORD: str = ""
+
     model_config = {"env_file": ".env", "case_sensitive": False}