fix(tests): stop requiring Containment Time when result is Not Contained

Containment Time was gated on detection alone, so picking "Not Contained"
still showed the field and required it before saving — there's no
containment moment to record when nothing was contained. Now only shown
and required when the result is Contained or Partially Contained; a
stale value from a prior Contained selection is cleared when the result
changes away from it, so it can't get silently resubmitted once hidden.

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

@@ -189,6 +189,12 @@ export default function TeamTabs({
     ? blueDraft.detection_result === "detected" || blueDraft.detection_result === "partially_detected"
     : test.detection_result === "detected" || test.detection_result === "partially_detected";
 
+  // Containment Time only makes sense when something was actually contained —
+  // "Not Contained" has no containment moment to record.
+  const isContained = canEditBlue
+    ? blueDraft.containment_result === "contained" || blueDraft.containment_result === "partially_contained"
+    : test.containment_result === "contained" || test.containment_result === "partially_contained";
+
   // Hint messages shown to operators when editing is locked
   const redLockedHint =
     test.state === "draft" && role === "red_tech"
@@ -520,7 +526,9 @@ export default function TeamTabs({
         </div>
       )}
 
-      {/* Detection & Containment times — only when detected/partially_detected */}
+      {/* Detection & Containment times — Detection Time whenever detected;
+          Containment Time only when something was actually contained —
+          "Not Contained" has no containment moment to record. */}
       {isDetected && (
         <div className="grid grid-cols-2 gap-4">
           <div>
@@ -541,6 +549,7 @@ export default function TeamTabs({
               </p>
             )}
           </div>
+          {isContained && (
             <div>
               <label className="mb-1.5 block text-sm font-medium text-gray-300">
                 Containment Time (UTC) <span className="text-red-400">*</span>
@@ -559,6 +568,7 @@ export default function TeamTabs({
                 </p>
               )}
             </div>
+          )}
         </div>
       )}
 

frontend/src/pages/TestDetailPage.tsx

@@ -446,7 +446,17 @@ export default function TestDetailPage() {
   };
 
   const handleBlueFieldChange = (field: string, value: string) => {
-    setBlueDraft((prev) => ({ ...prev, [field]: value }));
+    setBlueDraft((prev) => {
+      const next = { ...prev, [field]: value };
+      // Containment Time only applies when something was actually
+      // contained — clear a stale value left over from a previous
+      // "Contained"/"Partially Contained" selection so it doesn't get
+      // silently resubmitted once the field is hidden again.
+      if (field === "containment_result" && value !== "contained" && value !== "partially_contained") {
+        next.containment_time = "";
+      }
+      return next;
+    });
   };
 
   const handleUploadEvidence = async (file: File, team: TeamSide) => {
@@ -624,8 +634,9 @@ export default function TestDetailPage() {
                 <button
                   onClick={() => {
                     const isDetected = blueDraft.detection_result === "detected" || blueDraft.detection_result === "partially_detected";
+                    const isContained = blueDraft.containment_result === "contained" || blueDraft.containment_result === "partially_contained";
                     if (isDetected && !blueDraft.detection_time) { showToast("Detection Time is required", "error"); return; }
-                    if (isDetected && !blueDraft.containment_time) { showToast("Containment Time is required", "error"); return; }
+                    if (isContained && !blueDraft.containment_time) { showToast("Containment Time is required", "error"); return; }
                     saveBlueMutation.mutate();
                   }}
                   disabled={saveBlueMutation.isPending}