refactor(tests): format code for better readability in test files

backend/tests/test_security_headers_middleware.py

@@ -38,7 +38,9 @@ async def test_security_headers_middleware_appends_lowercase_raw_header_names()
         sent_messages.append(message)
 
     middleware = SecurityHeadersMiddleware(app, x_frame_options="SAMEORIGIN")
-    await middleware({"type": "http", "method": "GET", "path": "/", "headers": []}, lambda: None, capture)
+    await middleware(
+        {"type": "http", "method": "GET", "path": "/", "headers": []}, lambda: None, capture
+    )
 
     response_start = next(
         message for message in sent_messages if message.get("type") == "http.response.start"

frontend/src/app/activity/page.test.tsx

@@ -63,7 +63,8 @@ vi.mock("@clerk/nextjs", () => {
 describe("/activity auth boundary", () => {
   it("renders without ClerkProvider runtime errors when publishable key is a placeholder", () => {
     const previousAuthMode = process.env.NEXT_PUBLIC_AUTH_MODE;
-    const previousPublishableKey = process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY;
+    const previousPublishableKey =
+      process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY;
 
     // Simulate CI/secretless env where an arbitrary placeholder value may be present.
     // AuthProvider should treat this as disabled, and the auth wrappers must not render

frontend/src/app/approvals/page.test.tsx

@@ -60,7 +60,8 @@ vi.mock("@clerk/nextjs", () => {
 describe("/approvals auth boundary", () => {
   it("renders without ClerkProvider runtime errors when publishable key is a placeholder", () => {
     const previousAuthMode = process.env.NEXT_PUBLIC_AUTH_MODE;
-    const previousPublishableKey = process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY;
+    const previousPublishableKey =
+      process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY;
 
     process.env.NEXT_PUBLIC_AUTH_MODE = "local";
     process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY = "placeholder";