feat: 预计最终到期时间展示新增具体

openspec/changes/add-asset-estimated-final-expiry-display/specs/iot-card-management/spec.md

@@ -2,7 +2,7 @@
 
 ### Requirement: IoT Card Estimated Final Expiry Display
 
-The IoT card management list integration SHALL preserve and display the backend asset-level estimated final package expiry fields without calculating package continuation dates in the frontend.
+The IoT card management list integration SHALL preserve and display the five backend asset-level estimated final package expiry fields `estimated_final_expires_at`, `days_until_final_expiry`, `expiry_estimate_status`, `expiry_estimate_status_name`, and `is_expiring` returned in `data.items[]` by `GET /api/admin/iot-cards/standalone`. The status SHALL be one of `exact`, `waiting_activation`, `none`, or `invalid_data`; non-`exact` records SHALL have `estimated_final_expires_at=null` and `days_until_final_expiry=null`. The frontend SHALL NOT calculate package continuation dates. This requirement applies only to the admin IoT card list.
 
 #### Scenario: Display exact card final expiry estimate
 
@@ -13,11 +13,26 @@ The IoT card management list integration SHALL preserve and display the backend
 
 #### Scenario: Display activation-pending card final expiry
 
-- **GIVEN** 卡列表接口返回待激活等不可预计的 `expiry_estimate_status`
+- **GIVEN** 卡列表接口返回 `expiry_estimate_status=waiting_activation`
 - **WHEN** 页面渲染卡列表行
 - **THEN** `预计套餐到期时间` MUST display `待激活后起算`
 - **AND** 页面 MUST NOT calculate or display a fabricated date
 
+#### Scenario: Display card estimate status names for non-exact states
+
+- **GIVEN** 卡列表接口返回 `expiry_estimate_status=none` 或 `expiry_estimate_status=invalid_data`
+- **WHEN** 页面渲染卡列表行
+- **THEN** `none` MUST display a stable empty placeholder
+- **AND** `invalid_data` MUST display `数据异常`
+- **AND** 页面 MUST use the status enum to choose the display rule
+
+#### Scenario: Preserve null fields for non-exact card estimates
+
+- **GIVEN** 卡列表接口返回 `expiry_estimate_status=none` 或 `expiry_estimate_status=invalid_data`
+- **THEN** `estimated_final_expires_at` MUST be `null`
+- **AND** `days_until_final_expiry` MUST be `null`
+- **AND** 页面 MUST NOT derive either field from套餐数据
+
 #### Scenario: Highlight expiring card without reordering
 
 - **GIVEN** 卡列表接口返回 `is_expiring=true` and `days_until_final_expiry`
@@ -31,3 +46,9 @@ The IoT card management list integration SHALL preserve and display the backend
 - **WHEN** 页面渲染预计套餐到期时间列
 - **THEN** 页面 MUST display a stable placeholder
 - **AND** 页面 MUST NOT use an individual package expiry as a substitute
+
+#### Scenario: Preserve card status name without using it for business calculation
+
+- **WHEN** 卡列表接口返回 `expiry_estimate_status_name`
+- **THEN** 前端类型 MUST preserve the field
+- **AND** 页面 MUST NOT calculate or replace the backend status name