feat: change theme

lib/feature/chat/presentation/widgets/chat_panel.dart

@@ -107,7 +107,7 @@ class _ChatPanelState extends State<ChatPanel> {
                     isScrollable: true,
                     tabAlignment: TabAlignment.center,
                     indicator: BoxDecoration(
-                      color: const Color(0xFF7B0E14),
+                      color: AppColors.lapis,
                       borderRadius: BorderRadius.circular(10),
                       border: Border.all(color: AppColors.gold, width: 1.4),
                     ),
@@ -146,7 +146,7 @@ class _ChatPanelState extends State<ChatPanel> {
             gradient: const LinearGradient(
               begin: Alignment.topCenter,
               end: Alignment.bottomCenter,
-              colors: [Color(0xFF8E0E1B), Color(0xFF5A0A12)],
+              colors: [AppColors.lapisMid, AppColors.lapisLo],
             ),
             borderRadius: BorderRadius.circular(16),
             border: Border.all(color: AppColors.gold, width: 2),
@@ -171,7 +171,7 @@ class _ChatPanelState extends State<ChatPanel> {
               ),
               child: const Text('بسته چت',
                   style: TextStyle(
-                      color: Color(0xFF3A0A12),
+                      color: AppColors.lapisInk,
                       fontSize: 17,
                       fontWeight: FontWeight.bold)),
             ),
@@ -184,7 +184,7 @@ class _ChatPanelState extends State<ChatPanel> {
             onTap: () => Navigator.pop(context),
             child: const CircleAvatar(
               radius: 15,
-              backgroundColor: Color(0xFFB81D2A),
+              backgroundColor: AppColors.accent,
               child: Icon(Icons.close, color: Colors.white, size: 18),
             ),
           ),
@@ -211,7 +211,7 @@ class _ChatPanelState extends State<ChatPanel> {
       padding: const EdgeInsets.all(16),
       margin: const EdgeInsets.symmetric(horizontal: 24),
       decoration: BoxDecoration(
-        color: const Color(0xCC2A0710),
+        color: AppColors.lapisLo.withValues(alpha: 0.9),
         borderRadius: BorderRadius.circular(14),
         border: Border.all(color: AppColors.gold, width: 1.5),
       ),
@@ -270,7 +270,7 @@ class _ChatPanelState extends State<ChatPanel> {
                   gradient: const LinearGradient(
                     begin: Alignment.topCenter,
                     end: Alignment.bottomCenter,
-                    colors: [Color(0xFF9A1622), Color(0xFF5E0E16)],
+                    colors: [AppColors.lapisHi, AppColors.lapisLo],
                   ),
                   borderRadius: BorderRadius.circular(10),
                   border: Border.all(color: AppColors.goldDark, width: 1.2),