[codex] add usage currency auto detection

README.md

@@ -240,6 +240,24 @@ contextUsedTokens = usage.input_tokens +
 mode = "conversation"  # 或 "session"
 ```
 
+##### 💱 货币显示
+
+`usage` 组件默认使用 `currency = "auto"`。自动模式会先应用你配置的 endpoint/model 规则，再读取 Claude Code 传入的 `cost.currency`，随后匹配内置 endpoint/model 规则，最后回退到 USD。DeepSeek、MiniMax、Kimi、GLM、百炼、火山方舟、MiMo 等中外站点不同币种的 provider，建议优先用 endpoint 规则区分。
+
+注意：`conversation` 模式读取的是历史聚合的 `total_cost_usd` 存储值。为避免只换符号、不换金额，`currency = "auto"` 在该模式下会显示 USD；如果你确认自己的聚合成本已经是其他币种，可用 `currency = "CNY"` 等固定值强制显示。
+
+```toml
+[components.usage]
+currency = "auto" # auto | USD | CNY | EUR | GBP | JPY ...
+
+[components.usage.currency_endpoint_rules]
+"api.example.cn" = "CNY"
+"api.example.com" = "USD"
+
+[components.usage.currency_model_rules]
+"my-cny-model" = "CNY"
+```
+
 ##### 📊 成本计算公式
 
 ```javascript
@@ -669,6 +687,24 @@ Set in `config.toml`:
 mode = "conversation"  # or "session"
 ```
 
+##### 💱 Currency Display
+
+The `usage` component defaults to `currency = "auto"`. Auto mode first applies your custom endpoint/model rules, then trusts `cost.currency` from Claude Code when present, then matches built-in endpoint/model rules, and finally falls back to USD. For providers with different China/global pricing, such as DeepSeek, MiniMax, Kimi, GLM, Model Studio, Volcengine/BytePlus, and MiMo, prefer endpoint rules.
+
+Note: `conversation` mode reads historical `total_cost_usd` aggregate values from storage. To avoid changing only the symbol without converting the amount, `currency = "auto"` displays USD in that mode; use a fixed value such as `currency = "CNY"` only when you know the aggregate costs are already in that currency.
+
+```toml
+[components.usage]
+currency = "auto" # auto | USD | CNY | EUR | GBP | JPY ...
+
+[components.usage.currency_endpoint_rules]
+"api.example.cn" = "CNY"
+"api.example.com" = "USD"
+
+[components.usage.currency_model_rules]
+"my-cny-model" = "CNY"
+```
+
 ##### 📊 Cost Calculation Formula
 
 ```javascript

configs/config.template.toml

@@ -371,6 +371,12 @@ text_icon = "[$]"
 # 数值精度 | Decimal precision - 成本显示的小数位数
 precision = 2
 
+# 货币显示 | Currency display
+# "auto": 根据自定义规则、ANTHROPIC_BASE_URL endpoint、上游 cost.currency 和模型名推断
+# conversation 模式的历史聚合值来自 total_cost_usd 存储，auto 会保持 USD 符号
+# 也可强制指定 "USD"、"CNY"、"EUR"、"GBP"、"JPY" 等
+currency = "auto"
+
 # 显示模式 | Display mode
 # "session": 仅显示当前session成本（如 "$0.05"）
 # "conversation": 显示跨session累加成本（如 "$6.96 (2 sessions)"）
@@ -382,6 +388,17 @@ show_lines_added = true
 # 显示删除的代码行数 | Show lines removed  
 show_lines_removed = false
 
+# 自定义 endpoint -> currency 映射，优先级高于上游 cost.currency 和内置自动规则
+# 规则 key 可以写 host，也可以写完整 base URL；按 host 后缀匹配
+[components.usage.currency_endpoint_rules]
+# "api.example.cn" = "CNY"
+# "https://api.example.com/v1" = "USD"
+
+# 自定义 model name -> currency 映射，优先级低于 endpoint 映射，高于上游 cost.currency 和内置规则
+# 规则 key 按大小写不敏感的子串匹配
+[components.usage.currency_model_rules]
+# "my-cny-model" = "CNY"
+
 # -------------------- Status组件 --------------------
 # 显示Claude Code的当前状态和最近错误信息
 [components.status]