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/main.py

@@ -4,8 +4,8 @@ from starlette.middleware.sessions import SessionMiddleware
 
 from web.config import settings
 from web.database import engine, Base
-from web.models import User  # noqa: F401 — registers model with Base
-from web.routes import auth, profile, reset
+from web.models import User, EvotorConnection  # noqa: F401 — registers models with Base
+from web.routes import auth, profile, reset, evotor
 
 app = FastAPI(title="EvoSync — Личный кабинет")
 
@@ -15,6 +15,7 @@ app.mount("/static", StaticFiles(directory="web/static"), name="static")
 app.include_router(auth.router)
 app.include_router(profile.router)
 app.include_router(reset.router)
+app.include_router(evotor.router)
 
 
 @app.on_event("startup")