feat: 新增 ZenMux Token Plan 供应商，支持手动凭证与 USD 额度富展示 (#2709)

* feat(Token plan): 增加 ZenMux 支持

* chore: format code with prettier

* chore: format code with cargo fmt

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Co-authored-by: 明桓 <jihaodong.jhd@oceanbase.com>
Co-authored-by: Jason <farion1231@gmail.com>

src/types/subscription.ts

@@ -8,6 +8,9 @@ export interface QuotaTier {
   name: string;
   utilization: number; // 0-100
   resetsAt: string | null;
+  usedValueUsd?: number | null;
+  maxValueUsd?: number | null;
+  planLabel?: string | null;
 }
 
 export interface ExtraUsage {