feat(techniques): show test status on template cards

Each template card in 'Available Test Templates' now shows contextual
status derived from technique.tests (already loaded):

- Active test (draft/executing/evaluating/in_review):
    blue 'Executing / In Review' badge + 'View test →' button
    (prevents blind duplicate creation)
- Validated / detected (fresh):
    green 'Detected' badge + dimmed 'Re-run' button
- Validated / not_detected or partial:
    red/yellow result badge + full 'Run This Test' button (re-run encouraged)
- Validated but stale (review_required=true):
    result badge + '⚠ Coverage may be stale' line
- No tests: normal 'Run This Test' button

No extra API calls — status is derived from the technique detail
already in-memory.

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

frontend/src/pages/TechniqueDetailPage.tsx

@@ -373,11 +373,70 @@ export default function TechniqueDetailPage() {
           </div>
         ) : templates.length > 0 ? (
           <div className="grid gap-3 sm:grid-cols-2">
-            {templates.map((tpl) => (
+            {templates.map((tpl) => {
+              // ── Derive test status for this technique ──────────────
+              const allTests = (technique as any).tests ?? [];
+
+              // Any test currently in a non-terminal state
+              const ACTIVE_STATES: TestState[] = [
+                "draft", "red_executing", "blue_evaluating", "in_review",
+              ];
+              const activeTest = allTests.find(
+                (t: { state: TestState }) => ACTIVE_STATES.includes(t.state)
+              ) ?? null;
+
+              // Most recent validated test
+              const latestValidated: {
+                id: string;
+                detection_result: TestResult | null;
+                updated_at: string | null;
+                created_at: string;
+              } | null =
+                [...allTests]
+                  .filter((t: { state: TestState }) => t.state === "validated")
+                  .sort((a: { updated_at: string | null; created_at: string }, b: { updated_at: string | null; created_at: string }) =>
+                    (b.updated_at || b.created_at).localeCompare(a.updated_at || a.created_at)
+                  )[0] ?? null;
+
+              // Coverage is stale if the sync job raised the review flag
+              // (only meaningful when we already have a validated test)
+              const isStale = technique.review_required && !!latestValidated;
+
+              // ── Helpers ────────────────────────────────────────────
+              const ACTIVE_LABEL: Partial<Record<TestState, string>> = {
+                draft:           "Draft",
+                red_executing:   "Executing",
+                blue_evaluating: "Evaluating",
+                in_review:       "In Review",
+              };
+
+              const detResult = latestValidated?.detection_result;
+              const detBadgeStyle =
+                detResult === "detected"
+                  ? "border-green-500/30 bg-green-500/10 text-green-400"
+                  : detResult === "partially_detected"
+                  ? "border-yellow-500/30 bg-yellow-500/10 text-yellow-400"
+                  : detResult === "not_detected"
+                  ? "border-red-500/30 bg-red-500/10 text-red-400"
+                  : "border-gray-600/30 bg-gray-800/50 text-gray-400";
+
+              const detLabel =
+                detResult === "detected"        ? "Detected"
+                : detResult === "partially_detected" ? "Partial"
+                : detResult === "not_detected"  ? "Not detected"
+                : "Validated";
+
+              const needsReRun =
+                !activeTest &&
+                latestValidated &&
+                (detResult !== "detected" || isStale);
+
+              return (
               <div
                 key={tpl.id}
-                className="flex items-center justify-between rounded-lg border border-gray-800 bg-gray-800/30 p-4 transition-colors hover:border-gray-700"
+                className="flex items-start justify-between rounded-lg border border-gray-800 bg-gray-800/30 p-4 transition-colors hover:border-gray-700"
               >
+                {/* Left: template info */}
                 <div className="min-w-0 flex-1">
                   <p className="truncate text-sm font-medium text-gray-200">{tpl.name}</p>
                   <div className="mt-1 flex flex-wrap gap-1">
@@ -396,15 +455,60 @@ export default function TechniqueDetailPage() {
                     )}
                   </div>
                 </div>
+
+                {/* Right: status + action */}
+                <div className="ml-3 flex shrink-0 flex-col items-end gap-2">
+                  {/* ── Status badge ── */}
+                  {activeTest && (
+                    <span className="inline-flex items-center gap-1 rounded-full border border-blue-500/30 bg-blue-500/10 px-2 py-0.5 text-[10px] font-medium text-blue-400">
+                      <Clock className="h-2.5 w-2.5" />
+                      {ACTIVE_LABEL[activeTest.state as TestState] ?? activeTest.state.replace(/_/g, " ")}
+                    </span>
+                  )}
+
+                  {!activeTest && latestValidated && (
+                    <div className="flex flex-col items-end gap-0.5">
+                      <span className={`inline-flex items-center gap-1 rounded-full border px-2 py-0.5 text-[10px] font-medium ${detBadgeStyle}`}>
+                        {detResult === "detected"
+                          ? <CheckCircle className="h-2.5 w-2.5" />
+                          : <AlertTriangle className="h-2.5 w-2.5" />
+                        }
+                        {detLabel}
+                      </span>
+                      {isStale && (
+                        <span className="text-[9px] font-medium text-amber-400">
+                          ⚠ Coverage may be stale
+                        </span>
+                      )}
+                    </div>
+                  )}
+
+                  {/* ── Action button ── */}
+                  {activeTest ? (
+                    <button
+                      onClick={() => navigate(`/tests/${activeTest.id}`)}
+                      className="flex items-center gap-1 rounded-lg border border-blue-500/30 bg-blue-500/10 px-3 py-1.5 text-xs font-medium text-blue-400 hover:bg-blue-500/20 transition-colors"
+                    >
+                      <ExternalLink className="h-3.5 w-3.5" />
+                      View test
+                    </button>
+                  ) : (
                     <button
                       onClick={() => setTemplateFormId(tpl.id)}
-                  className="ml-3 flex shrink-0 items-center gap-1 rounded-lg border border-cyan-500/30 bg-cyan-500/10 px-3 py-1.5 text-xs font-medium text-cyan-400 hover:bg-cyan-500/20 transition-colors"
+                      className={`flex items-center gap-1 rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors ${
+                        latestValidated && detResult === "detected" && !isStale
+                          ? "border-gray-600/30 bg-gray-800/50 text-gray-400 hover:border-gray-600 hover:text-gray-300"
+                          : "border-cyan-500/30 bg-cyan-500/10 text-cyan-400 hover:bg-cyan-500/20"
+                      }`}
                     >
                       <FlaskConical className="h-3.5 w-3.5" />
-                  Run This Test
+                      {needsReRun ? "Run This Test" : latestValidated ? "Re-run" : "Run This Test"}
                     </button>
+                  )}
                 </div>
-            ))}
+              </div>
+              );
+            })}
           </div>
         ) : (
           <div className="flex flex-col items-center justify-center py-8 text-gray-400">