diff --git a/backend/app/api/routes/auth.py b/backend/app/api/routes/auth.py
index 78aaf5211..b50e332f3 100644
--- a/backend/app/api/routes/auth.py
+++ b/backend/app/api/routes/auth.py
@@ -33,7 +33,9 @@ async def set_auth_enabled(db: AsyncSession, enabled: bool) -> None:
     from sqlalchemy.dialects.sqlite import insert as sqlite_insert
 
     stmt = sqlite_insert(Settings).values(key="auth_enabled", value="true" if enabled else "false")
-    stmt = stmt.on_conflict_do_update(index_elements=["key"], set_={"value": "true" if enabled else "false", "updated_at": func.now()})
+    stmt = stmt.on_conflict_do_update(
+        index_elements=["key"], set_={"value": "true" if enabled else "false", "updated_at": func.now()}
+    )
     await db.execute(stmt)
     # Note: Don't commit here - let get_db handle it or commit explicitly in the route
 
diff --git a/backend/app/api/routes/printers.py b/backend/app/api/routes/printers.py
index 9a784cabe..2f5a86a58 100644
--- a/backend/app/api/routes/printers.py
+++ b/backend/app/api/routes/printers.py
@@ -48,7 +48,7 @@ async def list_printers(db: AsyncSession = Depends(get_db)):
 async def create_printer(
     printer_data: PrinterCreate,
     db: AsyncSession = Depends(get_db),
-    _current_user = RequireAdminIfAuthEnabled(),
+    _current_user=RequireAdminIfAuthEnabled(),
 ):
     """Add a new printer."""
     # Check if serial number already exists
@@ -83,7 +83,7 @@ async def update_printer(
     printer_id: int,
     printer_data: PrinterUpdate,
     db: AsyncSession = Depends(get_db),
-    _current_user = RequireAdminIfAuthEnabled(),
+    _current_user=RequireAdminIfAuthEnabled(),
 ):
     """Update a printer."""
     result = await db.execute(select(Printer).where(Printer.id == printer_id))
@@ -112,7 +112,7 @@ async def delete_printer(
     printer_id: int,
     delete_archives: bool = True,
     db: AsyncSession = Depends(get_db),
-    _current_user = RequireAdminIfAuthEnabled(),
+    _current_user=RequireAdminIfAuthEnabled(),
 ):
     """Delete a printer.
 
diff --git a/backend/app/core/auth.py b/backend/app/core/auth.py
index 0b2723e6e..072ec5754 100644
--- a/backend/app/core/auth.py
+++ b/backend/app/core/auth.py
@@ -106,9 +106,7 @@ async def get_current_user_optional(
         return user
 
 
-async def get_current_user(
-    credentials: Annotated[HTTPAuthorizationCredentials, Depends(security)]
-) -> User:
+async def get_current_user(credentials: Annotated[HTTPAuthorizationCredentials, Depends(security)]) -> User:
     """Get the current authenticated user from JWT token."""
     credentials_exception = HTTPException(
         status_code=status.HTTP_401_UNAUTHORIZED,
@@ -136,9 +134,7 @@ async def get_current_user(
         return user
 
 
-async def get_current_active_user(
-    current_user: Annotated[User, Depends(get_current_user)]
-) -> User:
+async def get_current_active_user(current_user: Annotated[User, Depends(get_current_user)]) -> User:
     """Get the current active user (alias for clarity)."""
     return current_user
 
@@ -189,9 +185,7 @@ async def require_auth_if_enabled(
 def require_role(required_role: str):
     """Dependency factory for role-based access control."""
 
-    async def role_checker(
-        current_user: Annotated[User, Depends(get_current_user)]
-    ) -> User:
+    async def role_checker(current_user: Annotated[User, Depends(get_current_user)]) -> User:
         if current_user.role != required_role:
             raise HTTPException(
                 status_code=status.HTTP_403_FORBIDDEN,
@@ -346,6 +340,7 @@ def RequireAdmin():
     """Dependency that requires admin role."""
     return Depends(require_role("admin"))
 
+
 def RequireAdminIfAuthEnabled():
     """Dependency that requires admin role if auth is enabled."""
     return Depends(require_admin_if_auth_enabled())
diff --git a/frontend/src/contexts/AuthContext.tsx b/frontend/src/contexts/AuthContext.tsx
index e9def611a..9429dad9b 100644
--- a/frontend/src/contexts/AuthContext.tsx
+++ b/frontend/src/contexts/AuthContext.tsx
@@ -30,7 +30,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
           try {
             const currentUser = await api.getCurrentUser();
             setUser(currentUser);
-          } catch (error) {
+          } catch {
             // Token invalid, clear it
             setAuthToken(null);
             setUser(null);
@@ -79,7 +79,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
       try {
         const currentUser = await api.getCurrentUser();
         setUser(currentUser);
-      } catch (error) {
+      } catch {
         setAuthToken(null);
         setUser(null);
       }