v 0.3 Preview: Update admin

backend/accounts/admin.py

@@ -20,6 +20,9 @@ class HulumathUserAdmin(UserAdmin):
         ("葫芦数学", {"fields": ("nickname", "track")}),
     )
     list_display = ("username", "nickname", "track", "rating", "is_active", "date_joined")
+    list_filter = ("is_active", "is_staff", "track", "date_joined")
+    search_fields = ("username", "nickname", "email")
+    ordering = ("-date_joined",)
 
 
 @admin.register(InviteCode)
@@ -27,9 +30,46 @@ class InviteCodeAdmin(admin.ModelAdmin):
     list_display = ("code", "group", "used_count", "max_uses", "expires_at", "is_active")
     list_filter = ("is_active", "group")
     search_fields = ("code", "group")
+    readonly_fields = ("used_count", "created_at")
+    ordering = ("-created_at",)
 
 
-admin.site.register(InviteCodeUsage)
-admin.site.register(UserSession)
-admin.site.register(VisitorMigration)
-admin.site.register(AuditLog)
+@admin.register(InviteCodeUsage)
+class InviteCodeUsageAdmin(admin.ModelAdmin):
+    list_display = ("invite_code", "user", "used_at", "ip_address")
+    search_fields = ("invite_code__code", "user__username", "user__nickname")
+    readonly_fields = ("invite_code", "user", "used_at", "ip_address")
+    ordering = ("-used_at",)
+
+
+@admin.register(UserSession)
+class UserSessionAdmin(admin.ModelAdmin):
+    list_display = ("user", "ip_address", "last_seen_at", "revoked_at")
+    search_fields = ("user__username", "user__nickname", "ip_address")
+    list_filter = ("revoked_at",)
+    readonly_fields = ("user", "session_key", "user_agent", "ip_address", "last_seen_at")
+
+
+@admin.register(VisitorMigration)
+class VisitorMigrationAdmin(admin.ModelAdmin):
+    list_display = ("user", "status", "created_at", "applied_at")
+    list_filter = ("status",)
+    search_fields = ("user__username", "user__nickname")
+    readonly_fields = ("user", "payload", "summary", "created_at", "applied_at")
+
+
+@admin.register(AuditLog)
+class AuditLogAdmin(admin.ModelAdmin):
+    list_display = ("action", "actor", "target_type", "target_id", "created_at")
+    list_filter = ("action", "target_type")
+    search_fields = ("actor__username", "action", "target_type", "target_id", "reason")
+    readonly_fields = (
+        "actor",
+        "action",
+        "target_type",
+        "target_id",
+        "reason",
+        "metadata",
+        "created_at",
+    )
+    ordering = ("-created_at",)