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- 纯函数（`module-game-distribution/src/collection.rs`，与收藏另两条规则同文件）：`encode/parse_game_distribution_collection_cursor`（`"{created_at_micros}:{collection_id}"`，复用仓库既有 `"{micros}:{id}"` 惯例；非法 → Err「收藏列表游标格式无效」→ 400）、`game_distribution_collection_page_limit`（0/缺省 → 20，超界 → 50）、`game_distribution_collection_page`（稳定全序排序 → 跳过游标之前 → 取 limit → 多取一条判 has_more，只对页内最后一条编码下一游标）
- 排序与顺序语义：`created_at` 倒序 + `collection_id` 升序兜底（主键、同用户内唯一 ⇒ 全序，翻页不重不漏）；**先按可见性过滤、再排序切页**——游标位置必须落在已过滤序列上，否则被过滤的行会让下一页漏项（推理写进 tx 与纯函数注释）；snapshot 只对最终页成员计算
- 模块：list 的 input 增 `limit` / `cursor`，result 增 `next_cursor`；api-server `my-collections` 加 `Query<MyCollectionsQuery>`，默认 20 / 上限 50（网格一屏 vs 单响应体积；与后台列表的 200 口径不必相等，理由写进注释），超界**截断**不报错，非法游标 400 透传不吞，日志带 `has_more`
- 契约：Rust DTO 增 `next_cursor`、TS 镜像同步、parity 登记（50 组一致）
- 文档：§3.4 的 `my-collections` 行补分页语义（默认/上限/游标格式/非法 400/末页 null/排序口径）
- 测试 13 条：纯函数 8（不足一页 → None；恰好整页不产生空游标；5 条 limit=2 连翻 3 页不重不漏；同 `created_at` 用 `collection_id` 兜底；limit=0 与超界；游标往返 + 7 种非法输入）、模块事务结构 2、api-server 3（默认与截断、`nextCursor` 透传、非法游标 → 400）
- 门禁：wasm build 0；`cargo check --all-targets` 0；`cargo test -p module-game-distribution` **81 passed**；`cargo test -p api-server game_distribution` **73 passed**；`cargo test -p spacetime-module` 274 passed / 1 ignored；DTO parity **50 组**；`check:spacetime-schema` 0（94 tables）；`check:encoding` 0（5382 files）；`cargo fmt --all -- --check` 0；`git diff --check` 0