Add live request pipeline recheck

frontend/app/requests/[id]/page.tsx

@@ -427,6 +427,38 @@ export default function RequestTimelinePage() {
   const posterUrl = snapshot.artwork?.poster_url
   const resolvedPoster = posterUrl?.startsWith('http') ? posterUrl : posterUrl ? `${getApiBase()}${posterUrl}` : null
 
+  const recheckRequest = async () => {
+    setBusyAction('recheck_pipeline')
+    setActionError(null)
+    setActionMessage(null)
+    setReleaseOptions([])
+    try {
+      const response = await authFetch(
+        `${getApiBase()}/requests/${snapshot.request_id}/actions/recheck`,
+        { method: 'POST' }
+      )
+      if (response.status === 401) {
+        clearToken()
+        router.push('/login')
+        return
+      }
+      if (!response.ok) {
+        throw new Error(await readApiError(response, 'The request could not be rechecked.'))
+      }
+      const data = await response.json()
+      if (!isSnapshotPayload(data?.snapshot)) {
+        throw new Error('The request was checked, but Magent did not return a valid pipeline.')
+      }
+      setSnapshot(data.snapshot)
+      setActionMessage(data?.message ?? 'Request status rebuilt from live service data.')
+    } catch (error) {
+      console.error(error)
+      setActionError(error instanceof Error ? error.message : 'The request could not be rechecked.')
+    } finally {
+      setBusyAction(null)
+    }
+  }
+
   const runAction = async (action: RequestAction) => {
     if (action.requires_confirmation && !window.confirm(`Run “${action.label}”?`)) return
     const actionPaths: Record<string, string> = {
@@ -538,15 +570,22 @@ export default function RequestTimelinePage() {
           <span className="request-overview-label">Next step</span>
           <strong>{nextStep.title}</strong>
           <p>{nextStep.description}</p>
-          {recommendedActions.length > 0 && (
-            <div className="request-action-row">
-              {recommendedActions.map((action) => (
-                <button key={action.id} type="button" disabled={Boolean(busyAction)} onClick={() => void runAction(action)}>
-                  {busyAction === action.id ? 'Working…' : action.label}
-                </button>
-              ))}
-            </div>
-          )}
+          <div className="request-action-row">
+            {recommendedActions.map((action) => (
+              <button key={action.id} type="button" disabled={Boolean(busyAction)} onClick={() => void runAction(action)}>
+                {busyAction === action.id ? 'Working…' : action.label}
+              </button>
+            ))}
+            <button
+              type="button"
+              className="request-recheck-button"
+              disabled={Boolean(busyAction)}
+              onClick={() => void recheckRequest()}
+              title="Recheck Seerr, the library collector, qBittorrent, and the media server"
+            >
+              {busyAction === 'recheck_pipeline' ? 'Rechecking…' : 'Recheck request'}
+            </button>
+          </div>
         </div>
         {(actionMessage || actionError) && (
           <div className={`request-action-feedback ${actionError ? 'is-error' : 'is-success'}`} role="status">