fix(shops): parse multipart logo upload on PATCH /shops/:id/logo

req.files.logo relied on an express-form-data style parser that was
removed app-wide, so the route never had a multipart parser and every
logo upload failed with "لطفاً لوگوی فروشگاه را انتخاب کنید" even
though the client had already picked and sent an image. Add the same
multer-based pattern already used for profile_image and shop-products
image uploads.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

controllers/application/shops/shopController.js

@@ -281,7 +281,7 @@ const updateShopLogo = async (req, res, next) => {
     if (error === 'NOT_FOUND') return shopError(res, 404, 'فروشگاه یافت نشد')
     if (error === 'FORBIDDEN') return shopError(res, 403, 'شما مالک این فروشگاه نیستید')
 
-    const logo = req.files?.logo
+    const logo = req.file
     if (!logo) {
       return shopError(res, 422, 'لطفاً لوگوی فروشگاه را انتخاب کنید')
     }
@@ -289,7 +289,7 @@ const updateShopLogo = async (req, res, next) => {
     const uploadDir = path.join(__dirname, '../../../storage/shops')
     fs.ensureDirSync(uploadDir)
 
-    const uniqueFileName = `${shop._id}-${Date.now()}${path.extname(logo.name)}`
+    const uniqueFileName = `${shop._id}-${Date.now()}${path.extname(logo.originalname || '')}`
     const filePath = path.join(uploadDir, uniqueFileName)
     await fs.move(logo.path, filePath, { overwrite: true })
     await optimizeImageFile(filePath, { maxDimension: 800 })