MAJOR UPPDATE: "First Ai"

feat: add AI categorization for products and enhance user management

- Integrated AI service for category suggestions in receipt import and product management.
- Added premium subscription feature for users with corresponding API endpoints.
- Implemented admin interface for managing pending product suggestions.
- Enhanced user management to include premium status and corresponding UI updates.
- Updated database schema to support new fields for premium status and product status.

backend/src/receipt-import/receipt-import.controller.ts

@@ -1,7 +1,9 @@
 import {
   Controller,
   Post,
+  Request,
   UploadedFile,
+  UseGuards,
   UseInterceptors,
   BadRequestException,
 } from '@nestjs/common';
@@ -9,6 +11,7 @@ import { FileInterceptor } from '@nestjs/platform-express';
 import { memoryStorage } from 'multer';
 import { ReceiptImportService } from './receipt-import.service';
 import { ParsedReceiptItem } from './dto/parsed-receipt-item.dto';
+import { JwtAuthGuard } from '../auth/jwt-auth.guard';
 
 const ALLOWED_MIMES = [
   'image/jpeg',
@@ -24,6 +27,7 @@ export class ReceiptImportController {
   constructor(private readonly receiptImportService: ReceiptImportService) {}
 
   @Post()
+  @UseGuards(JwtAuthGuard)
   @UseInterceptors(
     FileInterceptor('file', {
       storage: memoryStorage(),
@@ -32,6 +36,7 @@ export class ReceiptImportController {
   )
   async parseReceipt(
     @UploadedFile() file?: Express.Multer.File,
+    @Request() req?: any,
   ): Promise<ParsedReceiptItem[]> {
     if (!file?.buffer) {
       throw new BadRequestException('Ingen fil skickades med.');
@@ -41,6 +46,7 @@ export class ReceiptImportController {
         'Otillåten filtyp. Använd JPEG, PNG, WebP eller PDF.',
       );
     }
-    return this.receiptImportService.parseReceipt(file);
+    const isPremium = req?.user?.isPremium === true || req?.user?.role === 'admin';
+    return this.receiptImportService.parseReceipt(file, isPremium);
   }
 }