fix: 商户池和代理充值

openspec/changes/update-payment-merchant-pool-response-display/proposal.md

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+# Change: 补齐支付商户池新增响应字段展示
+
+## Why
+
+支付商户池接口新增启用成员数、当前命中商户和最近失败调查字段，前端类型及列表/详情尚未完整展示。
+
+## What Changes
+
+- 扩展商户池响应类型。
+- 商户池列表和详情展示新增运行状态与最近失败字段。
+- 保持现有代理充值新增参数在列表和详情中的展示。

openspec/changes/update-payment-merchant-pool-response-display/specs/payment-merchant-pool/spec.md

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+## ADDED Requirements
+
+### Requirement: Payment Merchant Pool Runtime Fields
+
+The merchant pool list and detail pages SHALL display enabled member count, total member count, current routed merchant, and the latest failure investigation fields returned by the backend.
+
+#### Scenario: Display pool runtime information
+
+- **WHEN** the pool list or detail response contains runtime fields
+- **THEN** the frontend MUST display them without deriving values from stale member data

openspec/changes/update-payment-merchant-pool-response-display/tasks.md

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+## 1. Implementation
+
+- [x] 1.1 扩展商户池类型。
+- [x] 1.2 更新商户池列表和详情字段。
+- [x] 1.3 校验代理充值列表/详情新增字段展示。
+
+## 2. Verification
+
+- [x] 2.1 运行类型检查、lint、构建和 OpenSpec 校验。