fix: multiple test-workflow bugs — draft wipe, dark date pickers, Jira status strings, Tempo gate, hold timer

- Fix the red/blue draft form losing unsaved fields (e.g. execution_start_time) whenever an evidence upload refetches the test — the hydration effect now runs once per test, not on every refetch.
- Add color-scheme: dark so native date/time picker popups match the app theme instead of rendering white.
- Fix _STATE_TO_JIRA_STATUS: real Jira statuses are 'To Do' and 'Red Team test review', not 'To-Do' and 'RT Test Review' — confirmed live against the actual workflow transitions, which is why Submit to Blue Team never moved the ticket past 'In Progress'.
- Tempo worklog sync was silently blocked by TEMPO_ENABLED defaulting to False with no admin-facing toggle, even after configuring a Tempo token via Settings. Now bypassed once an admin or personal token is actually configured, mirroring Jira's DB-backed enabled flag.
- Hold now actually pauses the running phase timer (paused_at), and Resume accumulates the held duration into red/blue_paused_seconds — previously the timer kept counting through a hold.

backend/tests/test_jira_service.py

@@ -119,11 +119,11 @@ def test_push_hold_event_sets_blocked(mock_get_client, mock_configured, db):
 @pytest.mark.parametrize(
     "new_state,expected_status",
     [
-        ("draft", "To-Do"),
+        ("draft", "To Do"),
         ("red_executing", "In Progress"),
-        ("red_review", "RT Test Review"),
+        ("red_review", "Red Team test review"),
         ("blue_evaluating", "Queued Blue Team"),
-        ("blue_review", "Blue Team Test Review"),
+        ("blue_review", "Blue Team test review"),
         ("in_review", "Validation"),
         ("validated", "Done"),
         ("rejected", "Rejected"),