fix: guardar OAuth Google con upsert real (PATCH vacío no insertaba)

El callback creía haber guardado el token y fallaba al emparejar Drive
con «no conectado». Upsert on_conflict=provider + match no bloquea OAuth.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/admin/drive/callback/route.ts

@@ -56,10 +56,11 @@ export async function GET(req: NextRequest) {
       email,
     });
 
-    // Auto-match
-    const headers = serviceHeaders();
+    // Auto-match folders (non-fatal: tokens already saved)
     let linked = 0;
     let ambiguous = 0;
+    try {
+      const headers = serviceHeaders();
       if (headers) {
         const tRes = await fetch(
           `${supabaseUrl()}/rest/v1/tenants?select=id,name,slug&order=name.asc`,
@@ -78,6 +79,9 @@ export async function GET(req: NextRequest) {
           ambiguous = matches.filter((m) => m.status === 'ambiguous').length;
         }
       }
+    } catch {
+      // match can fail without undoing OAuth
+    }
 
     const res = NextResponse.redirect(
       `${appUrl()}/dashboard/agencia?drive=ok&linked=${linked}&ambiguous=${ambiguous}`

src/components/DriveConnectPanel.tsx

@@ -38,14 +38,17 @@ export default function DriveConnectPanel() {
     const params = new URLSearchParams(window.location.search);
     if (params.get('drive') === 'ok') {
       setMsg(
-        `Drive conectado. Enlazadas ${params.get('linked') || 0} carpetas` +
+        `Google conectado. Enlazadas ${params.get('linked') || 0} carpetas Drive` +
           (params.get('ambiguous') && params.get('ambiguous') !== '0'
             ? ` · ${params.get('ambiguous')} ambiguas (revisa abajo)`
             : '')
       );
     }
     if (params.get('drive') === 'error') {
-      setErr(params.get('msg') || 'Error OAuth Drive');
+      setErr(params.get('msg') || 'Error OAuth Google');
+    }
+    if (params.get('drive')) {
+      window.history.replaceState({}, '', '/dashboard/agencia');
     }
     void loadStatus();
   }, []);
@@ -133,13 +136,21 @@ export default function DriveConnectPanel() {
         </div>
       </div>
 
-      {connected && (
-        <p className="text-xs text-emerald-400">
+      {connected ? (
+        <p className="text-xs text-emerald-700">
           Conectado{email ? ` · ${email}` : ''}
         </p>
+      ) : (
+        <p className="text-xs text-amber-800">
+          Aún no conectado — pulsa el botón naranja.
+        </p>
       )}
       {msg && <p className="text-xs text-gray-600">{msg}</p>}
-      {err && <p className="text-xs text-red-400">{err}</p>}
+      {err && (
+        <p className="text-xs text-red-700 bg-red-50 border border-red-200 rounded-lg px-3 py-2">
+          {err}
+        </p>
+      )}
 
       {matches && matches.length > 0 && (
         <ul className="space-y-2 max-h-72 overflow-y-auto">

src/lib/google-drive.ts

@@ -133,29 +133,27 @@ export async function saveAgencyOAuth(opts: {
   };
   if (opts.refreshToken) row.refresh_token = opts.refreshToken;
 
-  // Upsert: try PATCH then POST
-  const base = `${supabaseUrl()}/rest/v1/agency_oauth?provider=eq.${DRIVE_PROVIDER}`;
-  const patch = await fetch(base, {
-    method: 'PATCH',
-    headers: {
-      ...headers,
-      'Content-Type': 'application/json',
-      Prefer: 'return=minimal',
-    },
-    body: JSON.stringify(row),
-  });
-  if (patch.ok) return;
-
-  const ins = await fetch(`${supabaseUrl()}/rest/v1/agency_oauth`, {
+  // PostgREST PATCH returns 204 even when 0 rows match — do not treat that as success.
+  // Upsert on primary key `provider`.
+  const upsert = await fetch(
+    `${supabaseUrl()}/rest/v1/agency_oauth?on_conflict=provider`,
+    {
       method: 'POST',
       headers: {
         ...headers,
         'Content-Type': 'application/json',
-      Prefer: 'resolution=merge-duplicates',
+        Prefer: 'resolution=merge-duplicates,return=representation',
       },
       body: JSON.stringify(row),
-  });
-  if (!ins.ok) throw new Error(`save oauth: ${(await ins.text()).slice(0, 300)}`);
+    }
+  );
+  if (!upsert.ok) {
+    throw new Error(`save oauth: ${(await upsert.text()).slice(0, 300)}`);
+  }
+  const saved = (await upsert.json()) as unknown[];
+  if (!Array.isArray(saved) || saved.length === 0) {
+    throw new Error('save oauth: upsert no escribió filas');
+  }
 }
 
 type OAuthRow = {