refactor(apps): 主题系统迁移至 ColorScheme + 扩展架构并支持 Dark Mode

apps/lib/features/auth/presentation/screens/auth_boot_screen.dart

@@ -5,8 +5,9 @@ class AuthBootScreen extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
     return Scaffold(
-      backgroundColor: const Color(0xFFEFF8FF),
+      backgroundColor: colorScheme.surface,
       body: SafeArea(
         child: Center(
           child: Image.asset(

apps/lib/features/auth/presentation/screens/login_screen.dart

@@ -97,6 +97,8 @@ class _LoginViewState extends State<LoginView> {
   }
 
   Widget _buildAgreementCheckbox() {
+    final colorScheme = Theme.of(context).colorScheme;
+
     return Center(
       child: Row(
         mainAxisSize: MainAxisSize.min,
@@ -107,7 +109,7 @@ class _LoginViewState extends State<LoginView> {
             checked: _agreedToTerms,
             button: true,
             child: InkWell(
-              borderRadius: BorderRadius.circular(AppRadius.md),
+              borderRadius: BorderRadius.circular(AppRadius.sm),
               onTap: () => setState(() => _agreedToTerms = !_agreedToTerms),
               child: SizedBox(
                 width: 44,
@@ -119,21 +121,21 @@ class _LoginViewState extends State<LoginView> {
                     margin: const EdgeInsets.only(right: AppSpacing.sm),
                     decoration: BoxDecoration(
                       color: _agreedToTerms
-                          ? AppColors.blue600
-                          : Colors.transparent,
+                          ? colorScheme.primary
+                          : colorScheme.surface.withValues(alpha: 0),
                       borderRadius: BorderRadius.circular(4),
                       border: Border.all(
                         color: _agreedToTerms
-                            ? AppColors.blue600
-                            : AppColors.slate400,
+                            ? colorScheme.primary
+                            : colorScheme.onSurfaceVariant,
                         width: 1.5,
                       ),
                     ),
                     child: _agreedToTerms
-                        ? const Icon(
+                        ? Icon(
                             Icons.check,
                             size: 14,
-                            color: AppColors.white,
+                            color: colorScheme.onPrimary,
                           )
                         : null,
                   ),
@@ -143,21 +145,24 @@ class _LoginViewState extends State<LoginView> {
           ),
           RichText(
             text: TextSpan(
-              style: const TextStyle(fontSize: 13, color: AppColors.slate600),
+              style: TextStyle(
+                fontSize: 13,
+                color: colorScheme.onSurfaceVariant,
+              ),
               children: [
                 TextSpan(text: context.l10n.authAgreementPrefix),
                 TextSpan(
                   text: context.l10n.authAgreementTerms,
-                  style: const TextStyle(
-                    color: AppColors.blue600,
+                  style: TextStyle(
+                    color: colorScheme.primary,
                     decoration: TextDecoration.underline,
                   ),
                 ),
                 TextSpan(text: context.l10n.authAgreementAnd),
                 TextSpan(
                   text: context.l10n.authAgreementPrivacy,
-                  style: const TextStyle(
-                    color: AppColors.blue600,
+                  style: TextStyle(
+                    color: colorScheme.primary,
                     decoration: TextDecoration.underline,
                   ),
                 ),