Refactor: Change profile tab cancel actions to reset form state instead of navigating, and adjust agent availability UI.

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

@@ -438,16 +438,7 @@ class _AgentHomeContentState extends ConsumerState<_AgentHomeContent> {
               ),
             ),
             const Spacer(),
-            if (_isTogglingAvailability && !isActive)
-              const SizedBox(
-                width: 16,
-                height: 16,
-                child: CircularProgressIndicator(
-                  strokeWidth: 2,
-                  color: AppColors.accentOrange,
-                ),
-              )
-            else if (isActive)
+            if (isActive)
               Text(
                 'Active',
                 style: TextStyle(