Prettify lockscreen ui

lib/ui/lock_screen.dart

@@ -1,7 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:logging/logging.dart';
+import 'package:photos/ente_theme_data.dart';
 import 'package:photos/ui/app_lock.dart';
+import 'package:photos/ui/common/gradientButton.dart';
 import 'package:photos/utils/auth_util.dart';
 
 class LockScreen extends StatefulWidget {
@@ -24,17 +25,36 @@ class _LockScreenState extends State<LockScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       body: Center(
-        child: Container(
-          width: double.infinity,
-          height: 64,
-          padding: const EdgeInsets.fromLTRB(80, 0, 80, 0),
-          child: OutlinedButton(
-            child: Text("Unlock"),
-            onPressed: () async {
-              _showLockScreen();
-            },
-          ),
-        ),
+        child: Column(
+            crossAxisAlignment: CrossAxisAlignment.center,
+            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+            children: [
+              Stack(
+                alignment: Alignment.center,
+                children: [
+                  Image.asset(MediaQuery.of(context).platformBrightness ==
+                          Brightness.light
+                      ? 'assets/loading_photos_light.png'
+                      : 'assets/loading_photos_dark.png'),
+                  SizedBox(
+                    width: 172,
+                    child: GradientButton(
+                      child: Text(
+                        'Unlock',
+                        style: gradientButtonTextTheme(),
+                      ),
+                      linearGradientColors: const [
+                        Color(0xFF2CD267),
+                        Color(0xFF1DB954),
+                      ],
+                      onTap: () async {
+                        _showLockScreen();
+                      },
+                    ),
+                  ),
+                ],
+              ),
+            ]),
       ),
     );
   }