Sempurnakan auth flow: AuthGate route ke LoginScreen saat sessionExpired, _ensureSessionAndAuth bedakan auth mati vs network blip, refresh() stop query saat auth mati, login() reset sessionExpired + muat data langsung

lib/state/app_state.dart

@@ -197,7 +197,13 @@ class AppState extends ChangeNotifier {
   }
 
   Future<void> refresh() async {
-    await _ensureSessionAndAuth();
+    final authOk = await _ensureSessionAndAuth();
+    if (!authOk) {
+      // Auth mati: jangan lanjut query (pasti 401). Cukup notify agar
+      // AuthGate redirect ke LoginScreen.
+      notifyListeners();
+      return;
+    }
     await _loadProducts();
     await _loadSales();
     notifyListeners();
@@ -306,7 +312,13 @@ class AppState extends ChangeNotifier {
         'Login',
       );
       userId = res.user?.id;
+      _sessionExpired = false;
       await _loadProfile();
+      // Muat produk/riwayat langsung agar user tidak menunggu poll berikut.
+      // Gagal load tak mematikan proses login.
+      try {
+        await refresh();
+      } catch (_) {}
       notifyListeners();
       return null;
     } on AuthException catch (e) {
@@ -551,8 +563,15 @@ class AppState extends ChangeNotifier {
       if (res.session != null && !res.session!.isExpired) {
         return true;
       }
-    } catch (_) {}
-    _sessionExpired = true;
+      // Refresh jalan tapi session tetap tak valid → auth benar-benar mati.
+      _sessionExpired = true;
+    } on AuthException {
+      // Token refresh ditolak server (invalid/kedaluwarsa) → auth mati.
+      _sessionExpired = true;
+    } catch (_) {
+      // Error jaringan/timeout: JANGAN tandai sessionExpired (bisa network
+      // blip). Data gagal load sementara, session belum dianggap mati.
+    }
     return false;
   }