@

docs: reorganize api docs into categorized subdirectories and fill missing docs

- Categorize 77 existing api docs into 16 business-domain subdirectories
  (auth/ad/wallet/coupon/compare/savings/signin/tasks/invite/user/
   device/platform/intent/meituan/other) plus admin/ and internal/
- Split admin/ into 7 sub-resource subdirectories (auth/users/wallet/
  withdraws/feedbacks/admins/ad) with 4 single-file docs at root
- Create 21 new docs covering 28 previously undocumented endpoints:
  ad/watch-report, wallet/transfer-auth (3 endpoints), coupon/session+
  stats+completed-today+prompt (7), invite/me+invitees+bind+landing-track,
  user/onboarding (2), platform/flags+ad-config+app-version,
  intent/step+precoupon/step, analytics/events, order/report,
  report/submit+records, feedback/config+records, trace/finalize
- Add mock request/response JSON examples to all new docs
- Create docs/README.md with full category index for LLM navigation
- Update docs/api/README.md: fix all links, add new endpoint rows,
  replace "no doc" markers with actual links
- Fix back-navigation links (./README.md -> ../README.md or
  ../../README.md) in all moved files
@

docs/api/admin/admins/admin-admin-create.md

@@ -0,0 +1,33 @@
+# POST /admin/api/admins — 创建管理员
+
+> 所属:Admin·Accounts 组（前缀 `/admin/api/admins`） | 鉴权:Bearer admin_token（角色:super_admin） | [← 返回 API 索引](../../README.md)
+
+## 入参
+**application/json**:
+| 字段 | 类型 | 必填 | 默认 | 说明 |
+|---|---|---|---|---|
+| `username` | string | ✓ | — | 账号,3–64 字 |
+| `password` | string | ✓ | — | 初始密码,8–72 字(bcrypt ≤72 字节) |
+| `role` | string | ✗ | `operator` | 角色,枚举:`super_admin` / `finance` / `operator` |
+
+## 出参
+响应 `200`:`AdminOut`（新建的管理员)
+
+| 字段 | 类型 | 说明 |
+|---|---|---|
+| `id` | int | 管理员 id |
+| `username` | string | 账号 |
+| `role` | string | 角色 |
+| `status` | string | 状态(新建默认 `active`) |
+| `created_at` | datetime | 创建时间(UTC) |
+| `last_login_at` | datetime \| null | 上次登录时间(新建为 null) |
+
+## 错误码
+- `401` 未带 admin token / token 无效或过期 / 管理员被禁用
+- `403` 角色不足(仅 super_admin)
+- `409` 用户名已存在
+- `422` 缺字段 / `username` 长度不在 3–64 / `password` 长度不在 8–72 / `role` 非法枚举
+
+## 说明
+- 创建成功后写一条审计:`action=admin.create`、`target_type=admin`、`target_id=新管理员 id`、`detail={username, role}`。见 [admin_audit_log](../database/admin_audit_log.md)。
+- 数据表见 [admin_user](../database/admin_user.md)。