feat(api): add AI text-to-deck generation, wallet deposit structure, and profile/notification endpoints

Fills the gaps between the admin panel screens and the backend: a full
free-text + slide-count + language -> AI-generated presentation flow with
new slide-cloning logic in TemplateFillService, a "my presentations" list
endpoint, a swappable payment-gateway structure for wallet top-ups (fake
driver for now), and avatar upload / public-profile toggle / account
deletion / password change / notification preference endpoints.

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

app/Http/Requests/Profile/UpdateProfileRequest.php

@@ -25,6 +25,8 @@ class UpdateProfileRequest extends FormRequest
             'email' => ['sometimes', 'required', 'string', 'email', 'max:255', Rule::unique('users', 'email')->ignore($userId)],
             'mobile' => ['sometimes', 'required', 'string', 'regex:/^09\d{9}$/', Rule::unique('users', 'mobile')->ignore($userId)],
             'password' => ['sometimes', 'required', 'string', 'min:8'],
+            'avatar' => ['sometimes', 'nullable', 'image', 'max:3072'],
+            'is_public' => ['sometimes', 'nullable', 'boolean'],
         ];
     }
 
@@ -45,6 +47,8 @@ class UpdateProfileRequest extends FormRequest
             'mobile.unique' => 'این شماره موبایل قبلاً ثبت شده است.',
             'password.required' => 'رمز عبور الزامی است.',
             'password.min' => 'رمز عبور باید حداقل ۸ کاراکتر باشد.',
+            'avatar.image' => 'فایل ارسالی باید تصویر باشد.',
+            'avatar.max' => 'حداکثر حجم تصویر ۳ مگابایت است.',
         ];
     }
 }