feat: 增加友链申请、独立页面、投票/悬赏/抽奖帖与侧栏签到，并统一开发数据目录

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

frontend/src/hooks/useCheckIn.ts

@@ -0,0 +1,53 @@
+import { useCallback, useEffect, useState } from 'react';
+import { notify } from '@/lib/notify';
+import { api } from '../api/client';
+import type { CheckInStatus } from '../api/types';
+import { useAuth } from './useAuth';
+
+/** 每日签到状态与操作（侧栏、积分页等复用） */
+export function useCheckIn(enabled = true) {
+  const { user, refresh } = useAuth();
+  const [status, setStatus] = useState<CheckInStatus | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [busy, setBusy] = useState(false);
+
+  const load = useCallback(() => {
+    if (!user || !enabled) {
+      setStatus(null);
+      setLoading(false);
+      return;
+    }
+    setLoading(true);
+    api.checkInStatus()
+      .then(d => setStatus(d.check_in))
+      .catch(e => notify.error(e instanceof Error ? e.message : '加载签到状态失败'))
+      .finally(() => setLoading(false));
+  }, [user, enabled]);
+
+  useEffect(() => {
+    load();
+  }, [load]);
+
+  const doCheckIn = useCallback(async () => {
+    if (!user) return;
+    setBusy(true);
+    try {
+      const r = await api.checkIn();
+      notify.success(`签到成功，+${r.check_in.today_points} 积分`);
+      setStatus(r.check_in);
+      await refresh();
+    } catch (e: unknown) {
+      notify.error(e instanceof Error ? e.message : '签到失败');
+    } finally {
+      setBusy(false);
+    }
+  }, [user, refresh]);
+
+  return {
+    status,
+    loading,
+    busy,
+    doCheckIn,
+    reload: load,
+  };
+}