docs(theme): update documentation and clean up deprecated color scheme definitions

Removed outdated compatibility aliases and deprecated methods from AppColorScheme,
and updated CLAUDE.md to reflect new theme system requirements with centralized
color management and no hard-coded values in UI components.

flutter_monisuo/lib/ui/pages/asset/components/holdings_section.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:google_fonts/google_fonts.dart';
+import '../../../../core/theme/app_theme.dart';
 import '../../../../core/theme/app_color_scheme.dart';
 import '../../../../core/theme/app_spacing.dart';
 import '../../../../data/models/account_models.dart';
@@ -27,18 +27,13 @@ class HoldingsSection extends StatelessWidget {
             children: [
               Text(
                 '交易账户持仓',
-                style: GoogleFonts.inter(
-                  fontSize: 16,
-                  fontWeight: FontWeight.w600,
-                  color: colorScheme.onSurface,
-                ),
+                style: AppTextStyles.headlineLarge(context),
               ),
               Text(
                 '查看全部 >',
-                style: GoogleFonts.inter(
-                  fontSize: 12,
-                  fontWeight: FontWeight.normal,
+                style: AppTextStyles.bodyMedium(context).copyWith(
                   color: colorScheme.onSurfaceVariant,
+                  fontWeight: FontWeight.w400,
                 ),
               ),
             ],
@@ -50,8 +45,7 @@ class HoldingsSection extends StatelessWidget {
             padding: const EdgeInsets.all(AppSpacing.xl),
             child: Text(
               '暂无持仓',
-              style: GoogleFonts.inter(
-                fontSize: 13,
+              style: AppTextStyles.bodyLarge(context).copyWith(
                 color: colorScheme.onSurfaceVariant,
               ),
             ),
@@ -143,8 +137,7 @@ class HoldingRow extends StatelessWidget {
             alignment: Alignment.center,
             child: Text(
               coinCode.substring(0, 1),
-              style: GoogleFonts.inter(
-                fontSize: 14,
+              style: AppTextStyles.headlineMedium(context).copyWith(
                 fontWeight: FontWeight.w700,
                 color: accentColor,
               ),
@@ -159,18 +152,13 @@ class HoldingRow extends StatelessWidget {
               children: [
                 Text(
                   coinCode,
-                  style: GoogleFonts.inter(
-                    fontSize: 14,
-                    fontWeight: FontWeight.w600,
-                    color: colorScheme.onSurface,
-                  ),
+                  style: AppTextStyles.headlineMedium(context),
                 ),
                 const SizedBox(height: 2),
                 Text(
                   quantity,
-                  style: GoogleFonts.inter(
-                    fontSize: 12,
-                    fontWeight: FontWeight.normal,
+                  style: AppTextStyles.bodyMedium(context).copyWith(
+                    fontWeight: FontWeight.w400,
                     color: colorScheme.onSurfaceVariant,
                   ),
                 ),
@@ -184,18 +172,14 @@ class HoldingRow extends StatelessWidget {
             children: [
               Text(
                 value,
-                style: GoogleFonts.inter(
+                style: AppTextStyles.numberMedium(context).copyWith(
                   fontSize: 13,
-                  fontWeight: FontWeight.w500,
-                  color: colorScheme.onSurface,
                 ),
               ),
               const SizedBox(height: 2),
               Text(
                 profitRate,
-                style: GoogleFonts.inter(
-                  fontSize: 12,
-                  fontWeight: FontWeight.w500,
+                style: AppTextStyles.numberSmall(context).copyWith(
                   color: profitColor,
                 ),
               ),