Handle usage API 429 backoff

Closes #204

Author: sirmalloc

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ccstatusline",
-  "version": "2.2.2",
+  "version": "2.2.3",
   "description": "A customizable status line formatter for Claude Code CLI",
   "module": "src/ccstatusline.ts",
   "type": "module",

src/types/RenderContext.ts

@@ -16,7 +16,7 @@ export interface RenderUsageData {
     extraUsageLimit?: number;
     extraUsageUsed?: number;
     extraUsageUtilization?: number;
-    error?: 'no-credentials' | 'timeout' | 'api-error' | 'parse-error';
+    error?: 'no-credentials' | 'timeout' | 'rate-limited' | 'api-error' | 'parse-error';
 }
 
 export interface RenderContext {