feat(flow-chat): show MCP tool input parameters

Expose stable MCP invocation parameters in a nested details section so
users can inspect requests without crowding the default card view.

- Keep parameter details collapsed by default and reset them when the
  parent card closes
- Allow failed and result-less calls to expose available input
- Auto-expand each MCP App once while preserving later user collapse
- Add focused coverage for input parsing and expansion behavior

Merge pull request GCWing#2372 from bobleer/bob/sync-session-history-…

…fixes

fix(sessions): stabilize durable history reconciliation

fix(cli): stabilize dispatch retention retries