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

frontend/src/components/test-detail/TestDetailHeader.tsx

@@ -10,6 +10,7 @@ import {
   ShieldCheck,
 } from "lucide-react";
 import type { Test, TestState, User } from "../../types/models";
+import LiveTimer from "./LiveTimer";
 
 // ── Progress steps ─────────────────────────────────────────────────
 
@@ -235,6 +236,30 @@ export default function TestDetailHeader({
     );
   };
 
+  // ── Live timer ───────────────────────────────────────────────────
+
+  const renderLiveTimer = () => {
+    if (test.state === "red_executing" && test.red_started_at) {
+      return (
+        <LiveTimer
+          startedAt={test.red_started_at}
+          label="Red Team Timer"
+          variant="red"
+        />
+      );
+    }
+    if (test.state === "blue_evaluating" && test.blue_started_at) {
+      return (
+        <LiveTimer
+          startedAt={test.blue_started_at}
+          label="Blue Team Timer"
+          variant="blue"
+        />
+      );
+    }
+    return null;
+  };
+
   // ── Render ───────────────────────────────────────────────────────
 
   return (
@@ -263,7 +288,10 @@ export default function TestDetailHeader({
           </div>
         </div>
 
-        {renderActions()}
+        <div className="flex flex-col items-end gap-2">
+          {renderLiveTimer()}
+          {renderActions()}
+        </div>
       </div>
 
       {/* Progress bar */}