feat: Enhance contact agent bottom sheet layout with max height and safe area, and refine send request button styling.

lib/features/agents/presentation/screens/agent_detail_screen.dart

@@ -1664,20 +1664,21 @@ class _ConnectModalContentState extends State<_ConnectModalContent> {
     return Padding(
       padding: EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
       child: Container(
+        constraints: BoxConstraints(
+          maxHeight: MediaQuery.of(context).size.height * 0.85,
+        ),
         decoration: const BoxDecoration(
           color: Colors.white,
           borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
         ),
-        padding: EdgeInsets.fromLTRB(
+        child: SafeArea(
-          24,
+          top: false,
-          24,
-          24,
-          24 + MediaQuery.of(context).padding.bottom,
-        ),
           child: SingleChildScrollView(
+            padding: const EdgeInsets.fromLTRB(24, 24, 24, 24),
             child: _success ? _buildSuccessContent() : _buildFormContent(),
           ),
         ),
+      ),
     );
   }
 
@@ -1860,12 +1861,17 @@ class _ConnectModalContentState extends State<_ConnectModalContent> {
                   onPressed: _isSubmitting ? null : _handleSend,
                   style: ElevatedButton.styleFrom(
                     backgroundColor: AppColors.accentOrange,
+                    foregroundColor: Colors.white,
                     disabledBackgroundColor:
                         AppColors.accentOrange.withValues(alpha: 0.5),
+                    disabledForegroundColor: Colors.white,
                     shape: RoundedRectangleBorder(
                       borderRadius: BorderRadius.circular(24),
                     ),
+                    padding: const EdgeInsets.symmetric(horizontal: 16),
                   ),
+                  child: FittedBox(
+                    fit: BoxFit.scaleDown,
                     child: Text(
                       _isSubmitting ? 'Sending...' : 'Send Request',
                       style: const TextStyle(
@@ -1878,6 +1884,7 @@ class _ConnectModalContentState extends State<_ConnectModalContent> {
                   ),
                 ),
               ),
+            ),
           ],
         ),
       ],