fixed the return values to strings instead of JSON.parse

.opencode/tools/tea-context.ts

@@ -7,7 +7,7 @@ export const whoami = tool({
   async execute(args, context) {
     try {
       const result = await $`tea whoami --output json`.text()
-      return JSON.parse(result)
+      return result
     } catch (error: any) {
       return {
         error: "Failed to get current user info",