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frontend/app/post/[id]/edit/page.tsx

@@ -0,0 +1,137 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { fetchPostDetail, apiMe, apiUpdatePost, type Post, type User } from "@/lib/api";
+
+interface EditPageProps {
+  params: Promise<{ id: string }>;
+}
+
+export default function EditPostPage({ params }: EditPageProps) {
+  const router = useRouter();
+  const [post, setPost] = useState<Post | null>(null);
+  const [user, setUser] = useState<User | null>(null);
+  const [title, setTitle] = useState("");
+  const [content, setContent] = useState("");
+  const [tags, setTags] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+  const [checking, setChecking] = useState(true);
+
+  // params 是 Promise，需要解包
+  const [id, setId] = useState("");
+  useEffect(() => {
+    params.then((p) => setId(p.id));
+  }, [params]);
+
+  // 加载帖子 + 校验权限
+  useEffect(() => {
+    if (!id) return;
+    Promise.all([fetchPostDetail(id), apiMe()])
+      .then(([postData, meData]) => {
+        setPost(postData.post);
+        setTitle(postData.post.title);
+        setContent(postData.post.content);
+        setTags(postData.post.tags || "");
+        const u = meData.user;
+        setUser(u || null);
+        // 非作者且非管理员 → 跳转
+        if (!u || (u.id !== postData.post.user.id && u.role !== "admin")) {
+          router.push(`/post/${id}`);
+        }
+      })
+      .catch(() => router.push(`/post/${id}`))
+      .finally(() => setChecking(false));
+  }, [id, router]);
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!post) return;
+    setLoading(true);
+    setError("");
+    try {
+      const res = await apiUpdatePost(String(post.id), { title, content, tags });
+      if (res.post) {
+        router.push(`/post/${post.id}`);
+      } else {
+        setError(res.error || "更新失败");
+      }
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  if (checking) {
+    return (
+      <div className="max-w-3xl mx-auto mt-12 text-center" style={{ color: "var(--text-secondary)" }}>
+        加载中...
+      </div>
+    );
+  }
+
+  if (!post) return null;
+
+  return (
+    <div className="max-w-3xl mx-auto">
+      <h1 className="text-2xl font-bold mb-6">编辑帖子</h1>
+      <form onSubmit={handleSubmit} className="space-y-4">
+        {error && (
+          <div className="p-3 rounded-lg bg-red-50 text-red-600 text-sm">{error}</div>
+        )}
+        <div>
+          <label className="block text-sm mb-1" style={{ color: "var(--text-secondary)" }}>标题</label>
+          <input
+            type="text"
+            value={title}
+            onChange={(e) => setTitle(e.target.value)}
+            required
+            maxLength={256}
+            className="w-full px-3 py-2 rounded-lg border"
+            style={{ borderColor: "var(--border)", background: "var(--bg)", color: "var(--text)" }}
+          />
+        </div>
+        <div>
+          <label className="block text-sm mb-1" style={{ color: "var(--text-secondary)" }}>标签（逗号分隔，可选）</label>
+          <input
+            type="text"
+            value={tags}
+            onChange={(e) => setTags(e.target.value)}
+            placeholder="例如：技术,Go"
+            className="w-full px-3 py-2 rounded-lg border"
+            style={{ borderColor: "var(--border)", background: "var(--bg)", color: "var(--text)" }}
+          />
+        </div>
+        <div>
+          <label className="block text-sm mb-1" style={{ color: "var(--text-secondary)" }}>内容（支持 Markdown）</label>
+          <textarea
+            value={content}
+            onChange={(e) => setContent(e.target.value)}
+            required
+            rows={12}
+            className="w-full px-3 py-2 rounded-lg border resize-y font-mono"
+            style={{ borderColor: "var(--border)", background: "var(--bg)", color: "var(--text)" }}
+          />
+        </div>
+        <div className="flex gap-3">
+          <button
+            type="submit"
+            disabled={loading || !title.trim() || !content.trim()}
+            className="px-6 py-2 rounded-lg text-white disabled:opacity-50"
+            style={{ background: "var(--primary)" }}
+          >
+            {loading ? "保存中..." : "保存修改"}
+          </button>
+          <button
+            type="button"
+            onClick={() => router.push(`/post/${post.id}`)}
+            className="px-6 py-2 rounded-lg"
+            style={{ background: "var(--bg-secondary)", color: "var(--text)" }}
+          >
+            取消
+          </button>
+        </div>
+      </form>
+    </div>
+  );
+}