@

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/compare/compare-record-detail.md

@@ -0,0 +1,25 @@
+# GET /api/v1/compare/records/{record_id} — 比价记录详情
+
+> 所属:比价记录组（前缀 `/api/v1/compare`） | 鉴权:Bearer | [← 返回 API 索引](../README.md)
+
+单条比价记录详情，在列表项基础上额外带 `raw_payload`（客户端上报的原始全量），供未来 UI 展示任意细节。
+
+## 入参（path）
+
+| 字段 | 类型 | 说明 |
+|---|---|---|
+| `record_id` | int | 记录 id |
+
+## 出参
+响应 `200`：**ComparisonRecordDetailOut** = [ComparisonRecordOut](./compare-records.md#出参) 全部字段 + 下列：
+
+| 字段 | 类型 | 说明 |
+|---|---|---|
+| `raw_payload` | object \| null | 客户端上报的原始 body 全量（calibration + done.params） |
+
+## 错误
+- `401` 未鉴权
+- `404` 记录不存在，或不属于当前用户（限本人，避免越权读他人记录）
+
+## 说明
+`404` 同时覆盖「id 不存在」和「id 属于他人」两种情况——不区分以免泄露他人记录是否存在。