首次提交：姜十三论坛

后端 Go+Gin：认证/CSRF/限流、板块、帖子、评论、点赞、通知、用户资料、置顶推荐；前端 Next.js 16：发帖/编辑/删除、搜索、分页、点赞、通知中心、设置；基础设施 docker-compose 与配置模板；添加 .gitignore 与专有许可证（保留所有权利）

frontend/app/compose/page.tsx

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+"use client";
+
+import { useState, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { apiCreatePost, apiMe, fetchBoards, type Board } from "@/lib/api";
+
+export default function ComposePage() {
+  const router = useRouter();
+  const [boards, setBoards] = useState<Board[]>([]);
+  const [boardId, setBoardId] = useState<number>(0);
+  const [title, setTitle] = useState("");
+  const [content, setContent] = useState("");
+  const [tags, setTags] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    // 通过 /api/me 检查登录态（HttpOnly cookie 自动携带）
+    apiMe()
+      .then((res) => {
+        if (!res.user) {
+          router.push("/login?redirect=/compose");
+          return;
+        }
+        fetchBoards().then((data) => {
+          setBoards(data.boards);
+          if (data.boards.length > 0) setBoardId(data.boards[0].id);
+        });
+      })
+      .catch(() => router.push("/login?redirect=/compose"));
+  }, [router]);
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    setError("");
+    try {
+      const res = await apiCreatePost({
+        board_id: boardId,
+        title,
+        content,
+        tags,
+        post_type: "normal",
+      });
+      if (res.post) {
+        router.push(`/post/${res.post.id}`);
+      } else {
+        setError(res.error || "发帖失败");
+      }
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="max-w-3xl mx-auto">
+      <h1 className="text-2xl font-bold mb-6">发布新帖</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)" }}>板块</label>
+          <select
+            value={boardId}
+            onChange={(e) => setBoardId(Number(e.target.value))}
+            className="w-full px-3 py-2 rounded-lg border"
+            style={{ borderColor: "var(--border)", background: "var(--bg)", color: "var(--text)" }}
+          >
+            {boards.map((b) => (
+              <option key={b.id} value={b.id}>{b.name}</option>
+            ))}
+          </select>
+        </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}
+            placeholder="帖子标题"
+            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}
+            placeholder="帖子内容，支持 Markdown 格式..."
+            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>
+        <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 ? "发布中..." : "发布帖子"}
+        </button>
+      </form>
+    </div>
+  );
+}