Store calculation history on server with bazi input and chart snapshots.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/api/history/[id]/route.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+import { getHistoryUsername } from "@/lib/history/request-user";
+import { deleteHistoryEntry } from "@/lib/history/server-store";
+
+export async function DELETE(
+  _req: Request,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  const username = await getHistoryUsername();
+  if (!username) {
+    return NextResponse.json({ error: "请先登录" }, { status: 401 });
+  }
+
+  const { id } = await params;
+  const removed = await deleteHistoryEntry(username, id);
+  if (!removed) {
+    return NextResponse.json({ error: "记录不存在" }, { status: 404 });
+  }
+
+  return NextResponse.json({ ok: true });
+}