fix(gtea): ruff format + check all gtea files and bridge.py

Clears cc-ci self-test lint failures:
- ruff format: 9 files reformatted (all gtea test files + test_discovery.py)
- ruff check --fix: bridge.py UP017 (datetime.UTC alias) + 6 gtea check errors
- manifest.py B007: rename unused loop variable path → _path (no auto-fix available)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/gitea/test_install.py

@@ -33,8 +33,9 @@ def test_install_gitea(live_app, meta):
     # 3. Admin API reachable + authenticated — GET /api/v1/users/search as ci_admin
     user, password = admin_creds(live_app)
     import base64
-    import urllib.request
     import ssl
+    import urllib.request
+
     ctx = ssl.create_default_context()
     ctx.check_hostname = False
     ctx.verify_mode = ssl.CERT_NONE
@@ -44,6 +45,7 @@ def test_install_gitea(live_app, meta):
         headers={"Authorization": f"Basic {auth}"},
     )
     import urllib.error
+
     try:
         with urllib.request.urlopen(req, timeout=15, context=ctx) as r:
             assert r.status == 200, f"Admin API /users/search returned {r.status}"
@@ -52,16 +54,19 @@ def test_install_gitea(live_app, meta):
 
     # 4. Playwright: sign-in page renders
     from playwright.sync_api import sync_playwright
+
     url = f"https://{live_app}/user/login"
     with sync_playwright() as p:
         browser = p.chromium.launch(args=["--no-sandbox"])
         try:
             page = browser.new_context(ignore_https_errors=True).new_page()
-            harness_browser.goto_with_retry(page, url, accept_statuses=(200, 302), goto_timeout_ms=30_000)
+            harness_browser.goto_with_retry(
+                page, url, accept_statuses=(200, 302), goto_timeout_ms=30_000
+            )
             page.wait_for_selector("input#user_name", timeout=20_000)
             content = page.content()
-            assert "gitea" in content.lower() or "sign in" in content.lower(), (
-                "Sign-in page did not render expected gitea content"
-            )
+            assert (
+                "gitea" in content.lower() or "sign in" in content.lower()
+            ), "Sign-in page did not render expected gitea content"
         finally:
             browser.close()