feat: 类型帖互动、积分经济与发帖体验

补齐问答采纳/重开、投票匿名与有票禁编、悬赏过期退回、抽奖回帖开奖，并接入积分账本与发帖附件可见性。

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

frontend/app/admin/economy/page.tsx

@@ -0,0 +1,176 @@
+import type { Metadata } from "next";
+import Link from "next/link";
+import { cookies } from "next/headers";
+import { Coins, Flame, Gift, Layers } from "lucide-react";
+import { fetchAdminEconomyStats } from "@/lib/api";
+import { authCookieHeader } from "@/lib/cookies";
+import { getMeCached } from "@/lib/serverData";
+import { isAdminOrAbove } from "@/lib/roles";
+import { postTypeLabel } from "@/lib/postMeta";
+import { pointReasonLabel } from "@/lib/points";
+import { formatRelative } from "@/lib/format";
+import Forbidden from "../Forbidden";
+
+export const metadata: Metadata = {
+  title: "积分看板",
+};
+
+const fmt = (n: number) => n.toLocaleString("zh-CN");
+
+export default async function AdminEconomyPage() {
+  const cookie = authCookieHeader(await cookies());
+  const me = await getMeCached(cookie || undefined);
+  if (!me.user || !isAdminOrAbove(me.user.role)) {
+    return <Forbidden text="积分看板仅管理员及以上可查看。" />;
+  }
+
+  let stats: Awaited<ReturnType<typeof fetchAdminEconomyStats>> | null = null;
+  try {
+    stats = await fetchAdminEconomyStats(cookie);
+  } catch {
+    stats = null;
+  }
+
+  if (!stats) {
+    return (
+      <div className="panel p-8 text-center">
+        <p className="meta">暂时无法加载积分数据</p>
+      </div>
+    );
+  }
+
+  const cards = [
+    {
+      label: "用户余额合计",
+      value: fmt(stats.total_balance),
+      icon: <Coins size={18} />,
+      hint: "全站可用积分之和",
+    },
+    {
+      label: "今日签到",
+      value: fmt(stats.checkin_today),
+      icon: <Flame size={18} />,
+      hint: "今日已签到人数",
+    },
+    {
+      label: "托管中悬赏",
+      value: `${fmt(stats.open_bounties)} / ${fmt(stats.escrowed_points)}`,
+      icon: <Gift size={18} />,
+      hint: "未结算帖数 / 托管积分",
+    },
+    {
+      label: "流水条数",
+      value: fmt(stats.ledger_count),
+      icon: <Layers size={18} />,
+      hint: "历史入账出账记录",
+    },
+  ];
+
+  const typeEntries = Object.entries(stats.posts_by_type || {}).sort(
+    (a, b) => b[1] - a[1]
+  );
+
+  return (
+    <div>
+      <div className="mb-6">
+        <h1 className="text-[22px] font-extrabold" style={{ color: "var(--ink)" }}>
+          积分与类型帖看板
+        </h1>
+        <p className="meta text-[13px] mt-1">
+          观察全站积分流通、悬赏托管与帖子类型分布
+        </p>
+      </div>
+
+      <div className="grid grid-cols-1 sm:grid-cols-2 xl:grid-cols-4 gap-4 mb-6">
+        {cards.map((c) => (
+          <div key={c.label} className="panel p-5">
+            <div className="flex items-center gap-2 meta text-[12.5px]">
+              <span style={{ color: "var(--accent)" }}>{c.icon}</span>
+              {c.label}
+            </div>
+            <p
+              className="mt-3 text-[22px] font-extrabold tabular-nums leading-none"
+              style={{ color: "var(--ink)" }}
+            >
+              {c.value}
+            </p>
+            <p className="meta text-[12px] mt-2">{c.hint}</p>
+          </div>
+        ))}
+      </div>
+
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-5">
+        <section className="panel overflow-hidden">
+          <div
+            className="px-5 py-3.5 font-bold text-[15px]"
+            style={{ borderBottom: "1px solid var(--line)", color: "var(--ink)" }}
+          >
+            帖子类型分布
+          </div>
+          {typeEntries.length === 0 ? (
+            <p className="meta text-center py-10">暂无数据</p>
+          ) : (
+            <ul>
+              {typeEntries.map(([t, n]) => (
+                <li
+                  key={t}
+                  className="px-5 py-3 flex items-center justify-between"
+                  style={{ borderTop: "1px solid var(--line)" }}
+                >
+                  <span className="font-semibold text-[14px]" style={{ color: "var(--ink)" }}>
+                    {postTypeLabel(t)}
+                  </span>
+                  <span className="tabular-nums meta">{fmt(n)}</span>
+                </li>
+              ))}
+            </ul>
+          )}
+        </section>
+
+        <section className="panel overflow-hidden">
+          <div
+            className="px-5 py-3.5 font-bold text-[15px]"
+            style={{ borderBottom: "1px solid var(--line)", color: "var(--ink)" }}
+          >
+            最近流水
+          </div>
+          {(stats.recent_ledger || []).length === 0 ? (
+            <p className="meta text-center py-10">暂无流水</p>
+          ) : (
+            <ul>
+              {stats.recent_ledger.map((it) => (
+                <li
+                  key={it.id}
+                  className="px-5 py-3 flex items-start justify-between gap-3"
+                  style={{ borderTop: "1px solid var(--line)" }}
+                >
+                  <div className="min-w-0">
+                    <p className="font-semibold text-[13.5px] truncate" style={{ color: "var(--ink)" }}>
+                      {pointReasonLabel(it.reason)}
+                      {it.note ? ` · ${it.note}` : ""}
+                    </p>
+                    <p className="meta text-[12px] mt-0.5">{formatRelative(it.created_at)}</p>
+                  </div>
+                  <span
+                    className="tabular-nums font-bold shrink-0"
+                    style={{ color: it.delta >= 0 ? "var(--accent)" : "var(--danger)" }}
+                  >
+                    {it.delta >= 0 ? `+${it.delta}` : it.delta}
+                  </span>
+                </li>
+              ))}
+            </ul>
+          )}
+        </section>
+      </div>
+
+      <p className="meta text-[12.5px] mt-5">
+        用户可在{" "}
+        <Link href="/points" className="hover:text-[var(--accent)]">
+          /points
+        </Link>{" "}
+        查看个人流水。
+      </p>
+    </div>
+  );
+}