feat: add auth guards to protected routes and extend requireAuth coverage

app/(main)/post/new/page.tsx

@@ -20,6 +20,7 @@ import {
   SelectValue,
 } from "@/components/ui/select"
 import { Textarea } from "@/components/ui/textarea"
+import { useRequireAuth } from "@/lib/use-require-auth"
 
 const postSchema = z.object({
   title: z.string().min(2, "标题至少2个字符").max(50, "标题最多50个字符"),
@@ -30,6 +31,7 @@ const tagOptions = ["英雄联盟", "王者荣耀", "CS2", "原神", "上分", "
 
 export default function NewPostPage() {
   const router = useRouter()
+  const { isAuthenticated, requireAuth } = useRequireAuth()
   const [postType, setPostType] = useState("normal")
   const [selectedTags, setSelectedTags] = useState<string[]>([])
   const [imageCount, setImageCount] = useState(0)
@@ -49,6 +51,11 @@ export default function NewPostPage() {
   }
 
   const onSubmit = async () => {
+    if (!isAuthenticated) {
+      requireAuth(() => undefined)
+      return
+    }
+
     await new Promise((r) => setTimeout(r, 500))
     router.push("/community")
   }