feat: add invite code validity controls

- Add invite code starts/expires fields across contracts, API, Spacetime bindings, and admin UI
- Enforce pending/expired invite code redemption behavior and expose admin status
- Add admin write-operation confirmation guard and documentation
- Add invite code contract/runtime tests

docs/technical/SPACETIMEDB_TABLE_CATALOG.md

@@ -24,7 +24,7 @@ spacetime sql <db> "SELECT * FROM custom_world_gallery_entry"
 | --- | --- |
 | 运维迁移 | `database_migration_operator`, `database_migration_import_chunk` |
 | 认证 | `auth_store_snapshot`, `user_account`, `auth_identity`, `refresh_session` |
-| 运行时档案 | `runtime_setting`, `runtime_snapshot`, `user_browse_history`, `profile_dashboard_state`, `profile_wallet_ledger`, `tracking_event`, `tracking_daily_stat`, `profile_task_config`, `profile_task_progress`, `profile_task_reward_claim`, `profile_redeem_code`, `profile_redeem_code_usage`, `profile_invite_code`, `profile_referral_relation`, `profile_played_world`, `profile_membership`, `profile_recharge_order`, `profile_save_archive` |
+| 运行时档案 | `runtime_setting`, `runtime_snapshot`, `user_browse_history`, `profile_dashboard_state`, `profile_wallet_ledger`, `analytics_date_dimension`, `tracking_event`, `tracking_daily_stat`, `profile_task_config`, `profile_task_progress`, `profile_task_reward_claim`, `profile_redeem_code`, `profile_redeem_code_usage`, `profile_invite_code`, `profile_referral_relation`, `profile_played_world`, `profile_membership`, `profile_recharge_order`, `profile_save_archive` |
 | RPG 运行时 | `story_session`, `story_event`, `npc_state`, `inventory_slot`, `battle_state`, `treasure_record`, `quest_record`, `quest_log`, `player_progression`, `chapter_progression` |
 | 世界创作 | `custom_world_profile`, `custom_world_session`, `custom_world_agent_session`, `custom_world_agent_message`, `custom_world_agent_operation`, `custom_world_draft_card`, `custom_world_gallery_entry` |
 | 拼图 | `puzzle_agent_session`, `puzzle_agent_message`, `puzzle_work_profile`, `puzzle_event`, `puzzle_runtime_run`, `puzzle_leaderboard_entry` |
@@ -158,6 +158,20 @@ SELECT * FROM profile_wallet_ledger WHERE user_id = '<user_id>';
 SELECT * FROM profile_wallet_ledger WHERE user_id = '<user_id>' ORDER BY created_at DESC;
 ```
 
+### `analytics_date_dimension`
+
+- 作用：分析日期维表，每个北京时间业务自然日一行，用于把日桶映射到周、月、季度和年。
+- 结构：`date_key PK: i64`, `calendar_date: String`, `weekday: u8`, `iso_week_key: i32`, `week_start_date_key: i64`, `week_end_date_key: i64`, `month_key: i32`, `month_start_date_key: i64`, `month_end_date_key: i64`, `quarter_key: i32`, `quarter_start_date_key: i64`, `quarter_end_date_key: i64`, `year_key: i32`, `year_start_date_key: i64`, `year_end_date_key: i64`, `created_at: Timestamp`, `updated_at: Timestamp`。
+- 索引：主键 `date_key`，`iso_week_key`，`month_key`，`quarter_key`，`year_key`。
+- 写入口：`ensure_analytics_date_dimension_for_date({ date_key })` 幂等补单日；`seed_analytics_date_dimensions({ start_date, end_date })` 按 `YYYY-MM-DD` 闭区间幂等批量补种，单次最多 `3660` 天。
+- 口径：`date_key` 沿用当前埋点日桶 `floor((occurred_at_micros + 8h) / 1d)`，`calendar_date` 是该北京时间业务日的公历日期。
+
+```sql
+SELECT * FROM analytics_date_dimension WHERE date_key = <date_key>;
+SELECT * FROM analytics_date_dimension WHERE iso_week_key = 202501 ORDER BY date_key;
+SELECT * FROM analytics_date_dimension WHERE month_key = 202402 ORDER BY date_key;
+```
+
 ### `tracking_event`
 
 - 作用：埋点原始事件表，保存整站、作品、模块和用户层的原始事实。