Refactor backend auth, setup, router, and runtime state handling

backend/app/services/auth_service.py

@@ -22,7 +22,7 @@ if TYPE_CHECKING:
     from app.models.auth import Session
     from app.repositories.protocols import SessionRepository
 
-from app.repositories import session_repo
+from app.repositories import session_repo as default_session_repo
 from app.utils.constants import SESSION_TOKEN_BYTES, SESSION_TOKEN_SIGNATURE_SEPARATOR
 from app.utils.setup_utils import get_password_hash
 from app.utils.time_utils import add_minutes, utc_now
@@ -81,7 +81,7 @@ async def login(
     db: aiosqlite.Connection,
     password: str,
     session_duration_minutes: int,
-    session_repository: SessionRepository = session_repo,
+    session_repo: SessionRepository = default_session_repo,
 ) -> Session:
     """Verify *password* and create a new session on success.
 
@@ -110,7 +110,7 @@ async def login(
     created_iso = now.isoformat()
     expires_iso = add_minutes(now, session_duration_minutes).isoformat()
 
-    session = await session_repository.create_session(
+    session = await session_repo.create_session(
         db, token=token, created_at=created_iso, expires_at=expires_iso
     )
     log.info("bangui_login_success", token_prefix=token[:8])
@@ -121,7 +121,7 @@ async def validate_session(
     db: aiosqlite.Connection,
     token: str,
     session_secret: str | None = None,
-    session_repository: SessionRepository = session_repo,
+    session_repo: SessionRepository = default_session_repo,
 ) -> Session:
     """Return the session for *token* if it is valid and not expired.
 
@@ -142,13 +142,13 @@ async def validate_session(
         except ValueError as exc:
             raise ValueError("Session token is invalid.") from exc
 
-    session = await session_repository.get_session(db, token)
+    session = await session_repo.get_session(db, token)
     if session is None:
         raise ValueError("Session not found.")
 
     now_iso = utc_now().isoformat()
     if session.expires_at <= now_iso:
-        await session_repository.delete_session(db, token)
+        await session_repo.delete_session(db, token)
         raise ValueError("Session has expired.")
 
     return session
@@ -158,7 +158,7 @@ async def logout(
     db: aiosqlite.Connection,
     token: str,
     session_secret: str | None = None,
-    session_repository: SessionRepository = session_repo,
+    session_repo: SessionRepository = default_session_repo,
 ) -> str | None:
     """Invalidate the session identified by *token*.
 
@@ -177,6 +177,6 @@ async def logout(
             log.warning("bangui_logout_invalid_token", token_prefix=token[:8])
             return None
 
-    await session_repository.delete_session(db, token)
+    await session_repo.delete_session(db, token)
     log.info("bangui_logout", token_prefix=token[:8])
     return token