feat(mini-user): enable share on home/benefit and OSS qualification

Wire WeChat share on home and benefit tabs; serve mine qualification
from OSS; mask phones on admin users and wechat bindings pages.

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

apps/admin-web/src/lib/constants.ts

@@ -128,3 +128,18 @@ export const LEDGER_TYPE_LABELS: Record<string, string> = {
 export function fmtTime(v?: string | null) {
   return v ? new Date(v).toLocaleString('zh-CN') : '—';
 }
+
+/** 手机号脱敏展示：138****5678；空值返回 — */
+export function maskPhone(phone?: string | null): string {
+  const raw = String(phone ?? '').trim();
+  if (!raw) return '—';
+  const digits = raw.replace(/\D/g, '');
+  if (digits.length >= 11) {
+    return `${digits.slice(0, 3)}****${digits.slice(-4)}`;
+  }
+  if (digits.length >= 7) {
+    return `${digits.slice(0, 3)}****${digits.slice(-2)}`;
+  }
+  if (digits.length > 0) return `${digits.slice(0, 1)}****`;
+  return '****';
+}