fix(chat): Adjust input and padding spacing for better UI layout

lib/features/chat/views/chat_page.dart

@@ -2111,7 +2111,7 @@ class _ChatPageState extends ConsumerState<ChatPage> {
                               gradient: LinearGradient(
                                 begin: Alignment.topCenter,
                                 end: Alignment.bottomCenter,
-                                stops: const [0.0, 0.6, 1.0],
+                                stops: const [0.0, 0.4, 1.0],
                                 colors: [
                                   theme.scaffoldBackgroundColor,
                                   theme.scaffoldBackgroundColor.withValues(

lib/features/chat/widgets/modern_chat_input.dart

@@ -1279,7 +1279,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
             Spacing.inputPadding,
             0,
             Spacing.inputPadding,
-            0,
+            Spacing.sm,
           ),
           child: Row(
             children: [
@@ -1421,9 +1421,9 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     final bottomPadding = MediaQuery.of(context).viewPadding.bottom;
     return Padding(
       padding: EdgeInsets.fromLTRB(
-        Spacing.sm,
+        Spacing.screenPadding,
         0,
-        Spacing.sm,
+        Spacing.screenPadding,
         bottomPadding + Spacing.md,
       ),
       child: shell,