feat(minimax): add /usage support and fix MiniMax quota parsing (#869)

* Add MiniMax usage UI and API support

* Fix MiniMax usage parsing and refresh UI

* Refactor MiniMax usage handling

src/services/api/minimaxUsage.ts

@@ -0,0 +1,17 @@
+export type {
+  MiniMaxUsageData,
+  MiniMaxUsageRow,
+  MiniMaxUsageSnapshot,
+  MiniMaxUsageWindow,
+} from './minimaxUsage/types.js'
+
+export {
+  buildMiniMaxUsageRows,
+  normalizeMiniMaxUsagePayload,
+} from './minimaxUsage/parse.js'
+
+export {
+  fetchMiniMaxUsage,
+  getMiniMaxUsageUrls,
+  resolveMiniMaxUsageBaseUrl,
+} from './minimaxUsage/fetch.js'