feat(#48): add SYB sync orchestration, import endpoint and page entry

Stage 2. Completes the path from the SYB API to the archive.

sybimport.Sync pages a date range day by day and folds each detail line
through the existing idempotent ApplyDetail. The paging loop is driven by
listTotal, never by the list response's own total, which live data
confirmed is the page's row count rather than the filtered total. A day
whose completeness cannot be proven — a short page, a total that drifted
while paging, a detail response missing an order — stops the run instead
of reporting a partial import as a whole one. Rows already written stay:
they are idempotent on (order_code, detail_id), so a re-run overwrites.

sybimport.Connect reuses the cached session and only discards it when SYB
explicitly says it is invalid. Caching the numeric user id alongside the
cookies is required, not incidental: session validation calls
/am/user/get?id=, and a wrong id comes back as a business error rather
than a logout, so cookies alone can never be revalidated.

The import endpoint is single-flight and detached from the request
context, so closing the tab cannot abandon a half-finished range. It
reads only; no SYB write endpoint is reachable from GoAuto.

The page swaps its "no import entry" warning for a date-range dialog that
warns when the span is wide — a single week held over 7000 orders — and
reports partial progress when a run fails midway.

Verified: go build, go vet, go test ./... all pass. The drift check was
mutation-tested. Not verified: the MySQL migration for syb_session, and
any browser walkthrough.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/02-architecture-and-code-map.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Architecture-and-Code-Map
 wiki_url: https://git.ilapage.cn/OPC/goauto/wiki/Architecture-and-Code-Map.-
-wiki_revision: 945d51155a72ea5b41f600262590cf928de3f5ab
-synchronized_at: 2026-08-19T08:15:27Z
+wiki_revision: a94218dc2c7cbf1c5d56af808a02bf65aaa19964
+synchronized_at: 2026-08-19T08:53:52Z
 <!-- gitea-wiki-mirror:end -->
 
 # 架构与代码地图
@@ -81,7 +81,8 @@ Android Portal/Agent
 | PDD 商品档案增量迁移 | `server/cmd/migrate/migration/version-local/1786700500000_pdd_product_archive.go` |
 | 虾皮商品档案与规格映射 | `server/app/goauto/shopeeproduct/`（服务端 API 已实现；Admin 页面待实现） |
 | 虾皮商品档案增量迁移 | `server/cmd/migrate/migration/version-local/1786700600000_shopee_product_archive.go` |
-| SYB 商品明细导入、解析与虾皮档案合并 | `server/app/goauto/sybimport/`（解析、幂等落库、管理端 API 已实现；SYB 接口拉取客户端未实现，无凭据；Admin 页面已实现） |
+| SYB 商品明细导入、解析与虾皮档案合并 | `server/app/goauto/sybimport/`（解析、幂等落库、同步编排、导入端点、管理端 API 和 Admin 页面均已实现） |
+| 顺云宝（SYB）ERP HTTP 客户端与登录会话 | `server/app/goauto/sybclient/`（登录、OCR 验证码、会话缓存、列表与明细读取；见 [SYB-ERP-Interface-Contract](SYB-ERP-Interface-Contract)） |
 | SYB 商品明细增量迁移 | `server/cmd/migrate/migration/version-local/1786700700000_syb_product_import.go` |
 | 任务领取、结果、重置与删除 | `server/app/goauto/task/` |
 | 管理端基线 | `web/`（go-admin-ui v3.0.0） |