feat(ui): modals close only via Esc/X/cancel; standard 3:1 form cover processing

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/lead-forms/public-lead-forms.controller.ts

@@ -33,7 +33,10 @@ export class PublicLeadFormsController {
   ) {
     const row = await this.leadFormsService.getByToken(token);
     if (!row?.coverStorageKey) throw new NotFoundException('کاور پیدا نشد');
-    res.set({ 'Content-Type': 'image/jpeg', 'Cache-Control': 'public, max-age=3600' });
+    res.set({
+      'Content-Type': this.leadFormsService.coverContentType(row.coverStorageKey),
+      'Cache-Control': 'public, max-age=3600',
+    });
     return new StreamableFile(this.files.openReadStream(row.coverStorageKey));
   }