implementing favorite apps feature (#1410)

This PR implements favorite apps feature and addresses issue #827 
    
<!-- This is an auto-generated description by cubic. -->
---

## Summary by cubic
Adds a favorite apps feature with a star toggle in the sidebar.
Favorites are grouped separately and persisted, with optimistic UI
updates and e2e tests.

- **New Features**
- Added isFavorite to the apps schema and an IPC handler
(add-to-favorite) to toggle and persist the state.
  - Updated AppList to show “Favorite apps” and “Other apps” sections.
- Introduced AppItem component with a star button; uses
useAddAppToFavorite for optimistic updates and toasts.
  - Added Playwright tests to verify favoriting and unfavoriting.

- **Migration**
- Run DB migrations to add the apps.is_favorite column (defaults to 0).

<!-- End of auto-generated description by cubic. -->

src/hooks/useAddAppToFavorite.ts

@@ -0,0 +1,36 @@
+import { useMutation } from "@tanstack/react-query";
+import { IpcClient } from "@/ipc/ipc_client";
+import { showError, showSuccess } from "@/lib/toast";
+import { useAtom } from "jotai";
+import { appsListAtom } from "@/atoms/appAtoms";
+
+export function useAddAppToFavorite() {
+  const [_, setApps] = useAtom(appsListAtom);
+
+  const mutation = useMutation<boolean, Error, number>({
+    mutationFn: async (appId: number): Promise<boolean> => {
+      const result = await IpcClient.getInstance().addAppToFavorite(appId);
+      return result.isFavorite;
+    },
+    onSuccess: (newIsFavorite, appId) => {
+      setApps((currentApps) =>
+        currentApps.map((app) =>
+          app.id === appId ? { ...app, isFavorite: newIsFavorite } : app,
+        ),
+      );
+      showSuccess("App favorite status updated");
+    },
+    onError: (error) => {
+      showError(error.message || "Failed to update favorite status");
+    },
+  });
+
+  return {
+    toggleFavorite: mutation.mutate,
+    toggleFavoriteAsync: mutation.mutateAsync,
+    isLoading: mutation.isPending,
+    error: mutation.error,
+    isError: mutation.isError,
+    isSuccess: mutation.isSuccess,
+  };
+}