refactor(views): replace confirm dialogs with custom dialog manager

Replace native confirm dialogs with showFSDialog in Users, Sessions and InstanceDetail views for consistent UI and better user experience

src/views/InstanceDetail.vue

@@ -305,6 +305,7 @@ import { ref, onMounted, onUnmounted } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import { instanceApi } from '../api/index.js';
 import { showNotification, formatDate, getCookie } from '../utils/functions.js';
+import { showFSDialog } from '../utils/dialogManager.js';
 
 export default {
     name: 'InstanceDetail',
@@ -393,6 +394,13 @@ export default {
         };
 
         const deleteInstance = async () => {
+            const result = await showFSDialog(
+                1,
+                'Delete Instance',
+                'Are you sure you want to delete this instance? This action cannot be undone.'
+            );
+            if (result !== 1) return;
+            
             try {
                 const result = await instanceApi.deleteInstance(instanceID.value);
                 showNotification(result.message || 'Instance deleted successfully', 'success');

src/views/Sessions.vue

@@ -43,6 +43,7 @@
 import { ref, onMounted } from 'vue';
 import { sessionApi } from '../api/index.js';
 import { showNotification, formatDate } from '../utils/functions.js';
+import { showFSDialog } from '../utils/dialogManager.js';
 
 export default {
     name: 'Sessions',
@@ -59,7 +60,13 @@ export default {
         };
 
         const deleteSession = async (sessionId) => {
-            if (!confirm('Are you sure you want to delete this session? This will force the user to re-login.')) return;
+            const result = await showFSDialog(
+                1,
+                'Delete Session',
+                'Are you sure you want to delete this session? This will force the user to re-login.'
+            );
+            if (result !== 1) return;
+            
             try {
                 await sessionApi.removeSession(sessionId);
                 showNotification('Session deleted successfully', 'success');

src/views/Users.vue

@@ -84,6 +84,7 @@
 import { ref, onMounted } from 'vue';
 import { userApi } from '../api/index.js';
 import { showNotification, formatDate } from '../utils/functions.js';
+import { showFSDialog } from '../utils/dialogManager.js';
 
 export default {
     name: 'Users',
@@ -162,7 +163,13 @@ export default {
         };
 
         const deleteUser = async (userId) => {
-            if (!confirm('Are you sure you want to delete this user?')) return;
+            const result = await showFSDialog(
+                1,
+                'Delete User',
+                'Are you sure you want to delete this user?'
+            );
+            if (result !== 1) return;
+            
             try {
                 await userApi.removeUser(userId);
                 showNotification('User deleted successfully', 'success');