feat: add client release size bytes

apps/portal/admin.py

@@ -11,6 +11,7 @@ class DownloadReleaseAdmin(admin.ModelAdmin):
         "is_current",
         "force_update",
         "download_source",
+        "size_bytes",
         "sha256_short",
         "updated_at",
     )
@@ -36,6 +37,7 @@ class DownloadReleaseAdmin(admin.ModelAdmin):
                 "fields": (
                     "file",
                     "external_url",
+                    "size_bytes",
                     "sha256",
                 )
             },

apps/portal/migrations/0004_downloadrelease_size_bytes.py

@@ -0,0 +1,25 @@
+# Generated by Django 5.2.15 on 2026-07-13
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("portal", "0003_importtemplate"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="downloadrelease",
+            name="size_bytes",
+            field=models.PositiveBigIntegerField(
+                blank=True,
+                help_text="客户端下载文件大小，单位字节；桌面端用于下载后校验。",
+                null=True,
+                validators=[django.core.validators.MinValueValidator(1)],
+                verbose_name="文件大小字节数",
+            ),
+        ),
+    ]

apps/portal/models.py

@@ -1,5 +1,5 @@
 from django.core.exceptions import ValidationError
-from django.core.validators import RegexValidator
+from django.core.validators import MinValueValidator, RegexValidator
 from django.db import models, transaction
 
 
@@ -13,6 +13,13 @@ class DownloadRelease(models.Model):
     version = models.CharField("版本", max_length=64)
     file = models.FileField("安装包文件", upload_to="downloads/", blank=True)
     external_url = models.URLField("外部下载地址", blank=True)
+    size_bytes = models.PositiveBigIntegerField(
+        "文件大小字节数",
+        null=True,
+        blank=True,
+        validators=[MinValueValidator(1)],
+        help_text="客户端下载文件大小，单位字节；桌面端用于下载后校验。",
+    )
     sha256 = models.CharField(
         "SHA256",
         max_length=64,