fix(models-sync): unblock CI: mock tauri event module in tests, apply Prettier

Two changes required to make PR AOSSIE-Org#1371 pass the "PR Check" (Linting +
Frontend Tests) workflow:

- jest.setup.ts: mock '@tauri-apps/api/event' (listen/emit). The new
  cross-window sync listener in UserPreferencesCard calls listen() at
  mount; without the mock the real event module calls
  core.transformCallback on the mocked core and throws
  "core.transformCallback is not a function", crashing the Jest worker
  for SettingsPage / PageSanity / allPages suites.

- Apply repo Prettier config to the four files touched by the PR
  (model_manager.json, useUserPreferences.tsx, ModelManager.tsx,
  UserPreferencesCard.tsx): normalize the JSON permissions array,
  remove stray blank-line runs and trailing whitespace, and fix the
  onCloseRequested useEffect indentation. No behavior change.

Verified: full frontend suite 150/150 passing, prettier --check and
eslint --max-warnings 0 clean on all changed files.

Author: VanshajPoonia

frontend/jest.setup.ts

@@ -55,6 +55,11 @@ jest.mock('@tauri-apps/api/core', () => ({
   invoke: jest.fn().mockResolvedValue(null),
 }));
 
+jest.mock('@tauri-apps/api/event', () => ({
+  listen: jest.fn().mockResolvedValue(() => {}), // Returns unlisten function
+  emit: jest.fn().mockResolvedValue(undefined),
+}));
+
 jest.mock('@tauri-apps/api/app', () => ({
   getVersion: jest.fn().mockResolvedValue('1.0.0'),
   getName: jest.fn().mockResolvedValue('PictoPy'),

frontend/src-tauri/capabilities/model_manager.json

@@ -1,9 +1,11 @@
 {
   "identifier": "model-manager-capabilities",
   "windows": ["model-manager"],
-  "permissions": ["core:window:default",
-   "core:app:allow-version",
+  "permissions": [
+    "core:window:default",
+    "core:app:allow-version",
     "core:event:default",
-     "core:window:allow-close",
-     "core:window:allow-destroy"]
+    "core:window:allow-close",
+    "core:window:allow-destroy"
+  ]
 }

frontend/src/hooks/useUserPreferences.tsx

@@ -99,11 +99,8 @@ export const useUserPreferences = () => {
     updateYoloModelSize,
     toggleGpuAcceleration,
 
-
     // For refetching preferences after external events (e.g., Model Manager window closing)
     refetch: preferencesQuery.refetch,
-    
-
 
     // Mutation state (for use in UI, e.g., disabling buttons)
     isUpdating: updatePreferencesMutation.isPending,

frontend/src/pages/ModelManager/ModelManager.tsx

@@ -66,26 +66,24 @@ export const ModelManager: React.FC = () => {
     }
   }, [statusData, downloadingTiers, installedJustNow]);
 
-
-// ISSUE - 1369: Tauri windows don't share state, so Model Manager emits 'models-updated' on close to notify Settings.
+  // ISSUE - 1369: Tauri windows don't share state, so Model Manager emits 'models-updated' on close to notify Settings.
   useEffect(() => {
-  const unlistenPromise = getCurrentWindow().onCloseRequested(async (event) => {
-    event.preventDefault(); 
-    try {
-      await emit('models-updated');
-    } catch (err) {
-      console.error('Failed to emit models-updated', err);
-    }
-    await getCurrentWindow().destroy();
-    
-  });
-
-  return () => {
-    unlistenPromise.then((unlisten) => unlisten());
-  };
-}, []);
-
-
+    const unlistenPromise = getCurrentWindow().onCloseRequested(
+      async (event) => {
+        event.preventDefault();
+        try {
+          await emit('models-updated');
+        } catch (err) {
+          console.error('Failed to emit models-updated', err);
+        }
+        await getCurrentWindow().destroy();
+      },
+    );
+
+    return () => {
+      unlistenPromise.then((unlisten) => unlisten());
+    };
+  }, []);
 
   const handleTabChange = (newTab: string) => {
     if (activeTab === 'Available' && newTab !== 'Available') {

frontend/src/pages/SettingsPage/components/UserPreferencesCard.tsx

@@ -12,11 +12,9 @@ import {
 } from '@/components/ui/dropdown-menu';
 import { Button } from '@/components/ui/button';
 
-
 import { invoke } from '@tauri-apps/api/core';
 import { listen } from '@tauri-apps/api/event';
 
-
 import { useUserPreferences } from '@/hooks/useUserPreferences';
 import SettingsCard from './SettingsCard';
 import { formatTierLabel } from '@/lib/utils';
@@ -108,10 +106,6 @@ const UserPreferencesCard: React.FC = () => {
     };
   }, [refetch]);
 
-
-
-
-
   return (
     <SettingsCard
       icon={Cpu}