feat(adapter): claude local chrome flag and max-turns session handling

Add --chrome flag support for Claude adapter. Detect max-turns
exhaustion (via subtype, stop_reason, or result text) and clear
the session to prevent stale session re-use. Add unit tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/components/agent-config-defaults.ts

@@ -6,6 +6,7 @@ export const defaultCreateValues: CreateConfigValues = {
   promptTemplate: "",
   model: "",
   thinkingEffort: "",
+  chrome: false,
   dangerouslySkipPermissions: false,
   search: false,
   dangerouslyBypassSandbox: false,