feat(recipes): add recipe visibility and sharing features

- Implemented functionality to set recipe visibility (public/private) with appropriate checks for user permissions.
- Added ability to share recipes with other users, including validation for existing users and permissions.
- Introduced new DTOs for setting visibility and sharing recipes.
- Updated RecipesController and RecipesService to handle new endpoints for visibility and sharing.
- Enhanced inventory preview to consider user permissions and shared recipes.
- Updated front-end to support new sharing and visibility features, including UI changes for recipe detail and admin user management.

backend/src/users/users.service.ts

@@ -25,7 +25,17 @@ export class UsersService {
 
   findAll() {
     return this.prisma.user.findMany({
-      select: { id: true, username: true, email: true, firstName: true, lastName: true, role: true, isPremium: true, createdAt: true },
+      select: {
+        id: true,
+        username: true,
+        email: true,
+        firstName: true,
+        lastName: true,
+        role: true,
+        isPremium: true,
+        canShareRecipes: true,
+        createdAt: true,
+      },
       orderBy: { username: 'asc' },
     });
   }
@@ -38,6 +48,10 @@ export class UsersService {
     return this.prisma.user.update({ where: { id }, data: { isPremium } });
   }
 
+  setRecipeSharing(id: number, canShareRecipes: boolean) {
+    return this.prisma.user.update({ where: { id }, data: { canShareRecipes } });
+  }
+
   async adminCreate(data: { username: string; email: string; password: string; role?: string }) {
     const existing = await this.prisma.user.findFirst({
       where: { OR: [{ username: data.username }, { email: data.email }] },