feat: Modernisation UI/UX et configuration Flutter multi-plateforme

Phase 1 - Corrections Critiques:
- Fixed memory leaks dans music_provider.dart (stream subscriptions)
- Fixed race conditions dans search_provider.dart (stale results)
- Fixed token refresh errors dans api_service.dart
- Improved error handling avec messages utilisateur
- Changed API URL to HTTPS by default

Phase 2 - Améliorations UX Desktop:
- Ajouté cursor pointers sur tous les éléments cliquables
- Implémenté hover states avec effets néon glow (200ms transitions)
- Créé skeleton loading states avec shimmer animation
- Ajouté widgets: ClickableWrapper, ErrorDisplay, SkeletonLoading
- Enhanced visual feedback pour desktop users

Phase 3 - Configuration Flutter:
- Configuré Android (Gradle 8.1.0, Kotlin 1.9.0, minSdk 21, targetSdk 34)
- Créé launcher icons cyberpunk néon (5 densités)
- Configuré Windows desktop (structure complète)
- Activé Linux desktop support
- Ajouté package équatable pour entités de domaine
- Corrigé imports (colors.dart, auth_provider.dart)
- Fixed Dio API compatibility (RequestOptions)

Documentation:
- STYLE_GUIDE.md: Guide complet (100+ pages)
- DESIGN_IMPLEMENTATION_GUIDE.md: Implémentation Flutter
- BUILD_STATUS.md: Status builds + troubleshooting
- QUICKSTART_BUILDS.md: Guide rapide
- BUILD_INDEX.md: Index documentation
- PHASE_1_CORRECTIONS.md: Corrections Phase 1
- PHASE_2_UX_IMPROVEMENTS.md: Améliorations Phase 2
- PR_REVIEW_SUMMARY.md: Revue code complète
- CODE_ANALYSIS_AND_PRIORITIES.md: Analyse code

Scripts & Builds:
- BUILD_ALL.sh: Script automatisé builds multi-plateforme
- builds/: Structure avec README par plateforme
- design-system/: Système de design complet

Backend:
- Ajouté streaming HTTP Range pour audio progressif
- Enhanced YouTube service avec métadonnées complètes
- Improved error handling et validation

Generated with [Claude Code](https://claude.com/claude-code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

frontend/lib/presentation/pages/mobile/mobile_home_page.dart

@@ -1,13 +1,18 @@
 import 'package:flutter/material.dart';
 
 import '../../../core/theme/colors.dart';
+import '../../widgets/common/skeleton_loading.dart';
 
-/// Mobile Home Page
+/// Mobile Home Page with loading states
 class MobileHomePage extends StatelessWidget {
   const MobileHomePage({super.key});
 
   @override
   Widget build(BuildContext context) {
+    // TODO: Integrate with actual data provider
+    // For now, showing skeleton loading as example
+    final isLoading = false; // Change to true to see skeleton
+
     return CustomScrollView(
       slivers: [
         // Header
@@ -39,63 +44,68 @@ class MobileHomePage extends StatelessWidget {
           ),
         ),
 
-        // Content sections
+        // Content sections or skeleton
         SliverToBoxAdapter(
-          child: Padding(
-            padding: const EdgeInsets.all(16),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                // Quick picks grid
-                GridView.builder(
-                  shrinkWrap: true,
-                  physics: const NeverScrollableScrollPhysics(),
-                  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
-                    crossAxisCount: 2,
-                    childAspectRatio: 2.5,
-                    crossAxisSpacing: 12,
-                    mainAxisSpacing: 12,
-                  ),
-                  itemCount: 6,
-                  itemBuilder: (context, index) {
-                    return const _QuickPickCard();
-                  },
-                ),
+          child: isLoading
+              ? const PageSkeleton(
+                  showHero: false,
+                  sectionCount: 3,
+                )
+              : Padding(
+                  padding: const EdgeInsets.all(16),
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      // Quick picks grid
+                      GridView.builder(
+                        shrinkWrap: true,
+                        physics: const NeverScrollableScrollPhysics(),
+                        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                          crossAxisCount: 2,
+                          childAspectRatio: 2.5,
+                          crossAxisSpacing: 12,
+                          mainAxisSpacing: 12,
+                        ),
+                        itemCount: 6,
+                        itemBuilder: (context, index) {
+                          return const _QuickPickCard();
+                        },
+                      ),
 
-                const SizedBox(height: 24),
+                      const SizedBox(height: 24),
 
-                // Recently played
-                const _SectionTitle(title: 'Recently Played'),
-                const SizedBox(height: 12),
-                SizedBox(
-                  height: 160,
-                  child: ListView.builder(
-                    scrollDirection: Axis.horizontal,
-                    itemCount: 10,
-                    itemBuilder: (context, index) {
-                      return const _AlbumCard();
-                    },
+                      // Recently played
+                      const _SectionTitle(title: 'Recently Played'),
+                      const SizedBox(height: 12),
+                      SizedBox(
+                        height: 160,
+                        child: ListView.builder(
+                          scrollDirection: Axis.horizontal,
+                          itemCount: 10,
+                          itemBuilder: (context, index) {
+                            return const _AlbumCard();
+                          },
+                        ),
+                      ),
+
+                      const SizedBox(height: 24),
+
+                      // Made for you
+                      const _SectionTitle(title: 'Made For You'),
+                      const SizedBox(height: 12),
+                      SizedBox(
+                        height: 160,
+                        child: ListView.builder(
+                          scrollDirection: Axis.horizontal,
+                          itemCount: 8,
+                          itemBuilder: (context, index) {
+                            return const _PlaylistCard();
+                          },
+                        ),
+                      ),
+                    ],
                   ),
                 ),
-
-                const SizedBox(height: 24),
-
-                // Made for you
-                const _SectionTitle(title: 'Made For You'),
-                const SizedBox(height: 12),
-                SizedBox(
-                  height: 160,
-                  child: ListView.builder(
-                    scrollDirection: Axis.horizontal,
-                    itemCount: 8,
-                    itemBuilder: (context, index) {
-                      return const _PlaylistCard();
-                    },
-                  ),
-                ),
-              ],
-            ),
-          ),
         ),
       ],
     );