feat(phase-36): automatic Tempo time tracking via workflow buttons + fix campaign test management

- Add red_started_at/blue_started_at timing fields to Test model with Alembic migration

- Modify workflow transitions to auto-create integrity-hashed worklogs: Start Execution records red_started_at, Submit to Blue Team stops Red timer and creates worklog then starts Blue timer, Submit for Review stops Blue timer and creates worklog

- Auto-sync worklogs to Tempo when test has a Jira link

- Add LiveTimer component showing real-time elapsed counter during active phases

- Clear timing fields on test reopen

- Fix campaign test management: replace broken navigate-to-tests flow with AddTestToCampaignModal that lets users search and add existing tests directly from the campaign detail page

backend/app/services/tempo_service.py

@@ -89,8 +89,26 @@ def auto_log_test_worklog(
 
 
 def _calculate_duration(test, activity_type: str) -> int:
-    """Estimate duration in seconds based on test timestamps and activity type."""
+    """Calculate real duration in seconds from the phase timing fields.
+
+    Uses the actual start/end timestamps recorded by the workflow buttons,
+    so the data cannot be falsified.
+    """
+    from datetime import datetime
+
+    now = datetime.utcnow()
+
+    if activity_type == "red_team_execution" and test.red_started_at:
+        delta = now - test.red_started_at
+        return max(int(delta.total_seconds()), 1)
+
+    if activity_type == "blue_team_evaluation" and test.blue_started_at:
+        delta = now - test.blue_started_at
+        return max(int(delta.total_seconds()), 1)
+
+    # Fallback for legacy activity types
     if activity_type == "execution" and test.execution_date and test.created_at:
         delta = test.execution_date - test.created_at
         return max(int(delta.total_seconds()), 0)
-    return 3600  # default 1 hour if no timestamps available
+
+    return 0