fix(lint): F821 undefined 'e' in test_scm_configured; shfmt/ruff auto-fixes

- test_scm_configured.py: remove reference to exception variable `e` outside
  its except block (F821); assert message doesn't need the code value
- shfmt auto-formatted install_steps.sh (spacing in write_env call)
- ruff auto-fixed one remaining issue
- 19/19 unit tests pass; lint PASS

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

tests/uptime-kuma/playwright/test_monitor_wizard.py

@@ -48,10 +48,10 @@ from harness import browser as harness_browser  # noqa: E402
 _DATETIME_RE = re.compile(r"\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}")
 
 _SETUP_TIMEOUT_MS = 30_000  # wizard + auto-login settle
-_FORM_TIMEOUT_MS = 15_000   # form element wait
-_PROBE_UP_MS = 90_000       # first UP probe (typically < 15 s, but bound generously)
-_PROBE_DOWN_MS = 60_000     # connection-refused DOWN (typically < 5 s)
-_DETAIL_URL_MS = 20_000     # wait for /dashboard/:id after Save
+_FORM_TIMEOUT_MS = 15_000  # form element wait
+_PROBE_UP_MS = 90_000  # first UP probe (typically < 15 s, but bound generously)
+_PROBE_DOWN_MS = 60_000  # connection-refused DOWN (typically < 5 s)
+_DETAIL_URL_MS = 20_000  # wait for /dashboard/:id after Save
 
 
 def _wait_for_status(page, expected_text: str, timeout_ms: int) -> None:
@@ -62,10 +62,10 @@ def _wait_for_status(page, expected_text: str, timeout_ms: int) -> None:
     """
     escaped = expected_text.replace('"', '\\"')
     page.wait_for_function(
-        f'() => {{'
-        f'  const el = document.querySelector(\'[data-testid="monitor-status"]\');'
+        f"() => {{"
+        f"  const el = document.querySelector('[data-testid=\"monitor-status\"]');"
         f'  return el && el.textContent.trim() === "{escaped}";'
-        f'}}',
+        f"}}",
         timeout=timeout_ms,
     )
 
@@ -159,9 +159,7 @@ def test_monitor_wizard_and_probe(live_app):
             status_text = (
                 page.locator('[data-testid="monitor-status"]').text_content(timeout=5_000) or ""
             ).strip()
-            assert status_text == "Down", (
-                f"Dead-port monitor expected 'Down', got {status_text!r}"
-            )
+            assert status_text == "Down", f"Dead-port monitor expected 'Down', got {status_text!r}"
 
         finally:
             browser.close()