Add a per-row Test button to the Integrations list

The add/edit forms already had "Test connection", backed by existing
POST /api/integrations/:id/test (admin-only, pings with the stored
config) and POST /api/integrations/test (for a not-yet-saved one) --
but there was no way to re-test an already-configured integration
without opening its edit form. Add a "Test" button next to Edit/
Delete on each row, showing an OK/latency or Failed/error badge
inline once it returns. Pure frontend wiring to the existing endpoint,
no server changes needed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/pages/Integrations.tsx

@@ -29,6 +29,8 @@ export default function Integrations({ user }: { user: CurrentUser }) {
   const [editingIntegration, setEditingIntegration] = useState<IntegrationSummary | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [integrationColors, setIntegrationColors] = useState<Record<string, string>>({});
+  const [testingId, setTestingId] = useState<number | null>(null);
+  const [testResults, setTestResults] = useState<Record<number, { ok: boolean; latencyMs?: number; error?: string }>>({});
 
   useEffect(() => {
     api.settings.integrationColors().then((res) => setIntegrationColors(res.integrationColors)).catch(() => {});
@@ -52,6 +54,18 @@ export default function Integrations({ user }: { user: CurrentUser }) {
     }
   }
 
+  async function testIntegration(i: IntegrationSummary) {
+    setTestingId(i.id);
+    try {
+      const result = await api.integrations.testExisting(i.id, {});
+      setTestResults((prev) => ({ ...prev, [i.id]: result }));
+    } catch (err) {
+      setTestResults((prev) => ({ ...prev, [i.id]: { ok: false, error: err instanceof Error ? err.message : String(err) } }));
+    } finally {
+      setTestingId(null);
+    }
+  }
+
   async function removeIntegration(i: IntegrationSummary) {
     if (!confirm(`Delete integration "${i.name}"?`)) return;
     try {
@@ -159,7 +173,17 @@ export default function Integrations({ user }: { user: CurrentUser }) {
                   </td>
                   {isAdmin && (
                     <td>
-                      <div className="btn-list flex-nowrap">
+                      <div className="btn-list flex-nowrap align-items-center">
+                        <button className="btn btn-sm" onClick={() => testIntegration(i)} disabled={testingId === i.id}>
+                          {testingId === i.id ? "Testing…" : "Test"}
+                        </button>
+                        {testResults[i.id] && testingId !== i.id && (
+                          <span className={`badge ${testResults[i.id].ok ? "bg-green-lt text-green" : "bg-red-lt text-red"}`}>
+                            {testResults[i.id].ok
+                              ? `OK${testResults[i.id].latencyMs !== undefined ? ` (${testResults[i.id].latencyMs}ms)` : ""}`
+                              : "Failed"}
+                          </span>
+                        )}
                         <button className="btn btn-sm" onClick={() => setEditingIntegration(i)}>
                           Edit
                         </button>
@@ -167,6 +191,9 @@ export default function Integrations({ user }: { user: CurrentUser }) {
                           Delete
                         </button>
                       </div>
+                      {testResults[i.id] && !testResults[i.id].ok && testingId !== i.id && (
+                        <div className="text-red small mt-1">{testResults[i.id].error}</div>
+                      )}
                     </td>
                   )}
                 </tr>