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/utils/friendLink.ts

@@ -0,0 +1,38 @@
+import type { FriendLinkApply } from '../api/types';
+
+/** 解析友链 LOGO 为可加载的 URL（相对路径补全为当前站点 origin） */
+export function resolveFriendLinkLogo(logo?: string, siteURL?: string): string {
+  const raw = logo?.trim() || '';
+  if (!raw) return '';
+  if (/^https?:\/\//i.test(raw)) return raw;
+  if (raw.startsWith('/')) {
+    const base = siteURL?.trim() || (typeof window !== 'undefined' ? window.location.origin : '');
+    return base ? `${base.replace(/\/$/, '')}${raw}` : raw;
+  }
+  return raw;
+}
+
+/** 回链检测是否仍在后台进行中 */
+export function isReciprocalChecking(apply: FriendLinkApply): boolean {
+  if (apply.status !== 'pending') return false;
+  if (apply.reciprocal_checked_at) return false;
+  if (apply.reciprocal_verified) return false;
+  if (apply.reciprocal_check_note?.trim()) return false;
+  return true;
+}
+
+export function reciprocalStatusLabel(apply: FriendLinkApply): {
+  text: string;
+  variant: 'green' | 'orange' | 'secondary';
+} {
+  if (isReciprocalChecking(apply)) {
+    return { text: '检测中…', variant: 'secondary' };
+  }
+  if (apply.reciprocal_verified) {
+    return { text: '回链已检测到', variant: 'green' };
+  }
+  if (apply.reciprocal_check_note?.trim()) {
+    return { text: apply.reciprocal_check_note, variant: 'orange' };
+  }
+  return { text: '未检测', variant: 'secondary' };
+}