feat: restrict the allowed characters for slug

public/locales/zh/dashboard.json

@@ -130,5 +130,6 @@
   "Got it, thanks!" : "好的，谢谢！",
   "Published!" : "已发布！",
   "Title goes here...": "标题在这里...",
-  "Start writing...": "开始写作..."
+  "Start writing...": "开始写作...",
+  "Slug can only contain letters, numbers, hyphens, and underscores." : "短链接只能包含字母、数字、连字符和下划线。"
 }

src/pages/dashboard/[subdomain]/editor.tsx

@@ -140,6 +140,14 @@ export default function SubdomainEditor() {
           ),
         )
       }
+      if (key === "slug" && !/^[a-zA-Z0-9\-_]*$/.test(value as string)) {
+        toast.error(
+          t(
+            "Slug can only contain letters, numbers, hyphens, and underscores.",
+          ),
+        )
+        return
+      }
       const newValues = { ...values, [key]: value }
       if (draftKey) {
         setStorage(draftKey, {