fix: eval command displays result instead of undefined

Agent-browser returns { origin, result } for eval but the type declared
{ value } and the CLI formatter read v.value. Updated type and formatter
to match the actual response shape.

src/cli/index.ts

@@ -954,7 +954,7 @@ export async function main(argv = process.argv.slice(2), cwd = process.cwd()): P
       const expression = getRequiredStringFlag(parsed.flags, 'expression')
       const worktree = await getBrowserWorktreeSelector(parsed.flags, cwd, client)
       const result = await client.call<BrowserEvalResult>('browser.eval', { expression, worktree })
-      return printResult(result, json, (v) => v.value)
+      return printResult(result, json, (v) => v.result)
     }
 
     if (matches(commandPath, ['tab', 'list'])) {

src/shared/runtime-types.ts

@@ -210,7 +210,8 @@ export type BrowserScreenshotResult = {
 }
 
 export type BrowserEvalResult = {
-  value: string
+  result: string
+  origin: string
 }
 
 export type BrowserTabInfo = {