diff --git a/lib/controllers/model_controller.dart b/lib/controllers/model_controller.dart
index a6abaaa..4766312 100644
--- a/lib/controllers/model_controller.dart
+++ b/lib/controllers/model_controller.dart
@@ -504,7 +504,7 @@ class ModelController extends GetxController {
 
     _manager.addCustomModel(model);
 
-    final sizeStr = sizeGb > 0 ? ' (${sizeGb} GB)' : '';
+    final sizeStr = sizeGb > 0 ? ' ($sizeGb GB)' : '';
     Get.snackbar('Model Added', '$name$sizeStr added to your library!',
         snackPosition: SnackPosition.BOTTOM);
   }
diff --git a/lib/screens/api_endpoints_screen.dart b/lib/screens/api_endpoints_screen.dart
index 5de8b84..dfe29d8 100644
--- a/lib/screens/api_endpoints_screen.dart
+++ b/lib/screens/api_endpoints_screen.dart
@@ -76,9 +76,9 @@ class _ApiEndpointsScreenState extends State<ApiEndpointsScreen> {
             Container(
               padding: const EdgeInsets.all(16),
               decoration: BoxDecoration(
-                color: running ? AppColors.green.withOpacity(0.1) : AppColors.red.withOpacity(0.1),
+                color: running ? AppColors.green.withValues(alpha: 0.1) : AppColors.red.withValues(alpha: 0.1),
                 border: Border.all(
-                  color: running ? AppColors.green.withOpacity(0.3) : AppColors.red.withOpacity(0.3),
+                  color: running ? AppColors.green.withValues(alpha: 0.3) : AppColors.red.withValues(alpha: 0.3),
                 ),
                 borderRadius: BorderRadius.circular(12),
               ),
@@ -201,7 +201,7 @@ class _ApiEndpointsScreenState extends State<ApiEndpointsScreen> {
                 Container(
                   padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                   decoration: BoxDecoration(
-                    color: methodColor.withOpacity(0.15),
+                    color: methodColor.withValues(alpha: 0.15),
                     borderRadius: BorderRadius.circular(6),
                   ),
                   child: Text(
diff --git a/lib/screens/home_screen.dart b/lib/screens/home_screen.dart
index c6be4b2..d6cf0f8 100644
--- a/lib/screens/home_screen.dart
+++ b/lib/screens/home_screen.dart
@@ -358,7 +358,7 @@ class _HomeScreenState extends State<HomeScreen> {
           onDestinationSelected: (i) => setState(() => _mobileTabIndex = i),
           backgroundColor: Colors.transparent,
           elevation: 0,
-          indicatorColor: AppColors.accent.withOpacity(0.15),
+          indicatorColor: AppColors.accent.withValues(alpha: 0.15),
           labelBehavior: NavigationDestinationLabelBehavior.alwaysShow,
           height: 64,
           destinations: [
@@ -655,9 +655,9 @@ class _HomeScreenState extends State<HomeScreen> {
                     height: 32,
                     decoration: BoxDecoration(
                       color: isActive
-                          ? AppColors.green.withOpacity(0.15)
+                          ? AppColors.green.withValues(alpha: 0.15)
                           : isLoading
-                          ? AppColors.orange.withOpacity(0.15)
+                          ? AppColors.orange.withValues(alpha: 0.15)
                           : context.bgHover,
                       borderRadius: BorderRadius.circular(8),
                     ),
@@ -815,7 +815,7 @@ class _HomeScreenState extends State<HomeScreen> {
                 ),
                 decoration: BoxDecoration(
                   borderRadius: BorderRadius.circular(8),
-                  color: context.bgHover.withOpacity(0.5),
+                  color: context.bgHover.withValues(alpha: 0.5),
                 ),
                 child: Row(
                   mainAxisSize: MainAxisSize.min,
@@ -1045,7 +1045,7 @@ class _HomeScreenState extends State<HomeScreen> {
           borderRadius: BorderRadius.circular(24),
           boxShadow: [
             BoxShadow(
-              color: Colors.black.withOpacity(context.isDark ? 0.15 : 0.04),
+              color: Colors.black.withValues(alpha: context.isDark ? 0.15 : 0.04),
               blurRadius: 8,
               offset: const Offset(0, 2),
             ),
diff --git a/lib/screens/model_library_screen.dart b/lib/screens/model_library_screen.dart
index b07be71..80d1e00 100644
--- a/lib/screens/model_library_screen.dart
+++ b/lib/screens/model_library_screen.dart
@@ -122,7 +122,6 @@ class _ModelLibraryBodyState extends State<_ModelLibraryBody> {
                 filtered = allCatalog.where((m) => m.isCustom).toList();
                 break;
               case _Filter.all:
-              default:
                 filtered = allCatalog;
             }
 
@@ -527,7 +526,7 @@ class _ImportButton extends StatelessWidget {
         width: 40,
         height: 40,
         decoration: BoxDecoration(
-          color: color.withOpacity(0.15),
+          color: color.withValues(alpha: 0.15),
           borderRadius: BorderRadius.circular(10),
         ),
         child: Icon(icon, color: color, size: 20),
@@ -563,7 +562,7 @@ class _ImportButton extends StatelessWidget {
                 labelText: 'Model Name',
                 labelStyle: TextStyle(color: context.textD, fontSize: 13),
                 hintText: 'e.g. Mistral 7B Uncensored',
-                hintStyle: TextStyle(color: context.textD.withOpacity(0.5)),
+                hintStyle: TextStyle(color: context.textD.withValues(alpha: 0.5)),
                 filled: true,
                 fillColor: context.bgInput,
                 border: OutlineInputBorder(
@@ -589,7 +588,7 @@ class _ImportButton extends StatelessWidget {
                 labelText: 'Download URL',
                 labelStyle: TextStyle(color: context.textD, fontSize: 13),
                 hintText: 'https://huggingface.co/.../model.gguf',
-                hintStyle: TextStyle(color: context.textD.withOpacity(0.5)),
+                hintStyle: TextStyle(color: context.textD.withValues(alpha: 0.5)),
                 filled: true,
                 fillColor: context.bgInput,
                 border: OutlineInputBorder(
diff --git a/lib/screens/settings_screen.dart b/lib/screens/settings_screen.dart
index 3918ebf..1190638 100644
--- a/lib/screens/settings_screen.dart
+++ b/lib/screens/settings_screen.dart
@@ -391,8 +391,8 @@ class _SettingsBody extends StatelessWidget {
                             margin: const EdgeInsets.only(top: 4, bottom: 8),
                             padding: const EdgeInsets.all(8),
                             decoration: BoxDecoration(
-                              color: AppColors.orange.withOpacity(0.1),
-                              border: Border.all(color: AppColors.orange.withOpacity(0.3)),
+                              color: AppColors.orange.withValues(alpha: 0.1),
+                              border: Border.all(color: AppColors.orange.withValues(alpha: 0.3)),
                               borderRadius: BorderRadius.circular(8),
                             ),
                             child: Row(
diff --git a/lib/services/llm_service.dart b/lib/services/llm_service.dart
index 84f8596..d4209a9 100644
--- a/lib/services/llm_service.dart
+++ b/lib/services/llm_service.dart
@@ -1,6 +1,5 @@
 import 'dart:async';
 import 'dart:io';
-import 'package:flutter/foundation.dart';
 import 'package:get/get.dart';
 import 'package:llamadart/llamadart.dart';
 import 'package:path/path.dart' as p;
diff --git a/lib/widgets/chat_bubble.dart b/lib/widgets/chat_bubble.dart
index b573d7b..9220f01 100644
--- a/lib/widgets/chat_bubble.dart
+++ b/lib/widgets/chat_bubble.dart
@@ -86,8 +86,8 @@ class ChatBubble extends StatelessWidget {
                 fontSize: 13,
                 color: const Color(0xFFE6EDF3),
                 backgroundColor: context.isDark
-                    ? Colors.white.withOpacity(0.08)
-                    : Colors.black.withOpacity(0.06),
+                    ? Colors.white.withValues(alpha: 0.08)
+                    : Colors.black.withValues(alpha: 0.06),
               ),
               codeblockDecoration: BoxDecoration(
                 color: const Color(0xFF1E1E2E),
@@ -95,7 +95,7 @@ class ChatBubble extends StatelessWidget {
               ),
               codeblockPadding: const EdgeInsets.all(14),
               blockquoteDecoration: BoxDecoration(
-                color: AppColors.accent.withOpacity(0.08),
+                color: AppColors.accent.withValues(alpha: 0.08),
                 border: const Border(
                   left: BorderSide(color: AppColors.accent, width: 3),
                 ),
diff --git a/lib/widgets/model_card.dart b/lib/widgets/model_card.dart
index 00822fb..2bbc953 100644
--- a/lib/widgets/model_card.dart
+++ b/lib/widgets/model_card.dart
@@ -46,15 +46,15 @@ class ModelCard extends StatelessWidget {
     return Container(
       margin: const EdgeInsets.only(bottom: 12),
       decoration: BoxDecoration(
-        color: isLoaded ? AppColors.accent.withOpacity(0.05) : context.bgPanel,
+        color: isLoaded ? AppColors.accent.withValues(alpha: 0.05) : context.bgPanel,
         borderRadius: BorderRadius.circular(12),
         border: Border.all(
           color: isLoaded
-              ? AppColors.accent.withOpacity(0.5)
+              ? AppColors.accent.withValues(alpha: 0.5)
               : isLoadingModel
-                  ? AppColors.orange.withOpacity(0.5)
+                  ? AppColors.orange.withValues(alpha: 0.5)
                   : isCurrentlyDownloading
-                      ? AppColors.orange.withOpacity(0.4)
+                      ? AppColors.orange.withValues(alpha: 0.4)
                       : context.border,
         ),
       ),
@@ -177,7 +177,7 @@ class ModelCard extends StatelessWidget {
             Container(
               padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
               decoration: BoxDecoration(
-                color: AppColors.orange.withOpacity(0.15),
+                color: AppColors.orange.withValues(alpha: 0.15),
                 borderRadius: BorderRadius.circular(6),
               ),
               child: Text(
@@ -249,7 +249,7 @@ class ModelCard extends StatelessWidget {
             Container(
               padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
               decoration: BoxDecoration(
-                color: AppColors.accent.withOpacity(0.1),
+                color: AppColors.accent.withValues(alpha: 0.1),
                 borderRadius: BorderRadius.circular(4),
               ),
               child: Text(
@@ -373,7 +373,7 @@ class ModelCard extends StatelessWidget {
             Tooltip(
               message: 'Unload model from memory',
               child: Material(
-                color: AppColors.orange.withOpacity(0.12),
+                color: AppColors.orange.withValues(alpha: 0.12),
                 borderRadius: BorderRadius.circular(8),
                 child: InkWell(
                   onTap: onUnload,
@@ -399,8 +399,8 @@ class ModelCard extends StatelessWidget {
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
       decoration: BoxDecoration(
         color: isUncensored
-            ? AppColors.uncensored.withOpacity(0.15)
-            : AppColors.standard.withOpacity(0.15),
+            ? AppColors.uncensored.withValues(alpha: 0.15)
+            : AppColors.standard.withValues(alpha: 0.15),
         borderRadius: BorderRadius.circular(4),
       ),
       child: Text(
@@ -419,7 +419,7 @@ class ModelCard extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
       decoration: BoxDecoration(
-        color: AppColors.accent.withOpacity(0.15),
+        color: AppColors.accent.withValues(alpha: 0.15),
         borderRadius: BorderRadius.circular(4),
       ),
       child: Text(
@@ -437,7 +437,7 @@ class ModelCard extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
       decoration: BoxDecoration(
-        color: color.withOpacity(0.15),
+        color: color.withValues(alpha: 0.15),
         borderRadius: BorderRadius.circular(4),
       ),
       child: Row(