feat: add multi-image vision analysis

apps/billing/migrations/0008_alter_callrecord_operation_type_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.2.15 on 2026-07-16 03:52
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('billing', '0007_alter_pointsledger_change_type_signupbonusgrant'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='callrecord',
+            name='operation_type',
+            field=models.CharField(choices=[('title', '生成标题'), ('image', '生成图片'), ('vision', '图片理解')], max_length=32, verbose_name='操作类型'),
+        ),
+        migrations.AlterField(
+            model_name='pricingrule',
+            name='operation_type',
+            field=models.CharField(choices=[('title', '生成标题'), ('image', '生成图片'), ('vision', '图片理解')], max_length=32, verbose_name='操作类型'),
+        ),
+    ]

apps/billing/models.py

@@ -14,6 +14,7 @@ class CallRecord(models.Model):
     class OperationType(models.TextChoices):
         TITLE = "title", "生成标题"
         IMAGE = "image", "生成图片"
+        VISION = "vision", "图片理解"
 
     class Status(models.TextChoices):
         PENDING = "pending", "待处理"