should have push notifs as well as Battery SOC monitoring

lib/BlindMasterScreens/Startup/login_screen.dart

@@ -1,3 +1,4 @@
+import 'package:blind_master/BlindMasterResources/fcm_service.dart';
 import 'package:blind_master/BlindMasterResources/secure_transmissions.dart';
 import 'package:blind_master/BlindMasterScreens/Startup/create_user_screen.dart';
 import 'package:blind_master/BlindMasterScreens/Startup/forgot_password_screen.dart';
@@ -84,6 +85,7 @@ class _LoginScreenState extends State<LoginScreen> {
       if (token.isEmpty) throw Exception('Token Not Received');
       final storage = FlutterSecureStorage();
       await storage.write(key: 'token', value: token);
+      await FcmService.register();
 
     } catch(e) {
       if (!mounted) return;

lib/BlindMasterScreens/Startup/splash_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 
+import 'package:blind_master/BlindMasterResources/fcm_service.dart';
 import 'package:blind_master/BlindMasterResources/secure_transmissions.dart';
 import 'package:blind_master/BlindMasterScreens/home_screen.dart';
 import 'package:blind_master/BlindMasterScreens/Startup/login_screen.dart';
@@ -50,6 +51,7 @@ class _SplashScreenState extends State<SplashScreen> {
         }
         
         nextScreen = HomeScreen();
+        await FcmService.register();
       } else {
         nextScreen = LoginScreen();
       }

lib/BlindMasterScreens/email_verification_waiting_screen.dart

@@ -121,7 +121,7 @@ abstract class BaseVerificationWaitingScreenState<T extends BaseVerificationWait
           child: ListView(
             physics: AlwaysScrollableScrollPhysics(),
             children: [
-              Container(
+              SizedBox(
                 height: MediaQuery.of(context).size.height,
                 child: Column(
                   mainAxisAlignment: MainAxisAlignment.center,

lib/BlindMasterScreens/individualControl/device_screen.dart

@@ -24,6 +24,7 @@ class _DeviceScreenState extends State<DeviceScreen> {
   List occports = [];
   Widget? peripheralList;
   String deviceName = "...";
+  int? batterySoc;
 
   @override
   void initState() {
@@ -48,7 +49,8 @@ class _DeviceScreenState extends State<DeviceScreen> {
         final body = json.decode(response.body) as Map<String, dynamic>;
         setState(() {
           deviceName = body['device_name'];
-        }); 
+          batterySoc = body['battery_soc'] as int?;
+        });
       }
     } catch (e) {
       if (!mounted) return;
@@ -355,12 +357,30 @@ class _DeviceScreenState extends State<DeviceScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(
-          deviceName,
-          style: GoogleFonts.aBeeZee(),
-        ),
+        title: Text(deviceName, style: GoogleFonts.aBeeZee()),
         backgroundColor: Theme.of(context).primaryColorLight,
         foregroundColor: Colors.white,
+        actions: [
+          if (batterySoc != null)
+            Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 16),
+              child: Row(
+                children: [
+                  Icon(
+                    batterySoc! <= 10 ? Icons.battery_alert
+                    : batterySoc! <= 20 ? Icons.battery_1_bar
+                    : batterySoc! <= 40 ? Icons.battery_2_bar
+                    : batterySoc! <= 60 ? Icons.battery_3_bar
+                    : batterySoc! <= 80 ? Icons.battery_5_bar
+                    : Icons.battery_full,
+                    color: batterySoc! <= 10 ? Colors.red : Colors.white,
+                  ),
+                  const SizedBox(width: 4),
+                  Text('$batterySoc%', style: const TextStyle(color: Colors.white)),
+                ],
+              ),
+            ),
+        ],
       ),
       body: peripheralList ?? SizedBox(
         height: MediaQuery.of(context).size.height * 0.8,

lib/BlindMasterScreens/individualControl/peripheral_screen.dart

@@ -124,6 +124,27 @@ class _PeripheralScreenState extends State<PeripheralScreen> {
           }
         });
         
+        socket?.on("battery_alert", (data) {
+          if (data is! Map<String, dynamic>) return;
+          if (data['deviceId'] != widget.deviceId) return;
+          if (!mounted) return;
+          final type = data['type'] as String? ?? '';
+          final soc  = data['soc']  as int?    ?? 0;
+          final (String message, Color color) = switch (type) {
+            'overvoltage'          => ('Battery fault detected. Please check your charger.', Colors.red),
+            'critical_low'        => ('Battery critically low ($soc%). Device shutting down.', Colors.red),
+            'low_voltage_warning' => ('Battery voltage dip detected ($soc%). Monitor closely.', Colors.orange),
+            'low_20'              => ('Battery low: $soc% remaining. Consider charging soon.', Colors.orange),
+            'low_10'              => ('Battery very low: $soc% remaining. Charge now.', Colors.deepOrange),
+            _                     => ('Battery alert received ($soc%).', Colors.orange),
+          };
+          ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+            content: Text(message),
+            backgroundColor: color,
+            duration: const Duration(seconds: 6),
+          ));
+        });
+
         socket?.on("calib", (periphData) {
           if (periphData is Map<String, dynamic>) {
             if (periphData['periphID'] == widget.peripheralId) {