merge: integrate usage response models with service tier badges

Merge upstream PR #837, preserving its original commits and resolving the UsageModelDisplay layout conflict after #841. Cover response models alongside dynamic service-tier badges in detail tests.

frontend/src/api/dashboard.ts

@@ -219,6 +219,7 @@ export interface RequestDetail {
   has_format_conversion?: boolean | null
   model: string
   target_model?: string | null  // 映射后的目标模型名
+  response_model?: string | null  // 上游响应体实际返回的模型名
   requested_reasoning_effort?: string | null
   reasoning_effort?: string | null
   service_tier?: string | null

frontend/src/api/me.ts

@@ -60,6 +60,7 @@ export interface UsageRecordDetail {
   reasoning_effort?: string | null
   service_tier?: string | null
   actual_service_tier?: string | null
+  response_model?: string | null
   input_tokens: number
   effective_input_tokens?: number
   output_tokens: number
@@ -392,6 +393,7 @@ export const meApi = {
       has_format_conversion?: boolean | null
       has_fallback?: boolean | null
       target_model?: string | null
+      response_model?: string | null
       request_type?: string | null
       requested_reasoning_effort?: string | null
       reasoning_effort?: string | null
@@ -438,6 +440,7 @@ export const meApi = {
       has_format_conversion?: boolean | null
       has_fallback?: boolean | null
       target_model?: string | null
+      response_model?: string | null
       request_type?: string | null
       requested_reasoning_effort?: string | null
       reasoning_effort?: string | null

frontend/src/api/usage.ts

@@ -20,6 +20,7 @@ export interface UsageRecord {
   reasoning_effort?: string | null
   service_tier?: string | null
   actual_service_tier?: string | null
+  response_model?: string | null
   input_tokens: number
   effective_input_tokens?: number
   output_tokens: number
@@ -618,6 +619,7 @@ export const usageApi = {
       has_format_conversion?: boolean | null
       has_fallback?: boolean | null
       target_model?: string | null
+      response_model?: string | null
       request_type?: string | null
       requested_reasoning_effort?: string | null
       reasoning_effort?: string | null
@@ -685,6 +687,7 @@ export const usageApi = {
       has_format_conversion?: boolean | null
       has_fallback?: boolean | null
       target_model?: string | null
+      response_model?: string | null
       request_type?: string | null
       requested_reasoning_effort?: string | null
       reasoning_effort?: string | null

frontend/src/api/usageRecords.ts

@@ -19,6 +19,7 @@ export interface UsageRecord {
   model: string
   target_model?: string | null  // 映射后的目标模型名（若无映射则为空）
   model_version?: string | null  // Provider 返回的实际模型版本（列表轻量字段）
+  response_model?: string | null  // 上游响应体实际返回的模型名
   request_type?: string | null  // 由请求语义识别出的操作类型
   requested_reasoning_effort?: string | null  // 用户请求侧 reasoning 级别，用于展示转换关系
   reasoning_effort?: string | null  // 从发送给 Provider 的请求体提取的 reasoning 级别