### Improvements
- TUI ESM panel: track FullThink/FullText/FullResult/LastToolName/LastToolArgs for complete sub-agent activity inspection
- ESM panel shows Now/Progress/Next status with pipeline stage count and remaining items
- Tool modal renders raw assistant/thinking content directly; activity timeline preserved without truncation
- Tool argument keys sorted alphabetically for deterministic display

### Fixes
- Fix OpenAI-compatible provider tool call failures against providers (e.g. Volcengine Ark) that stream tool arguments as raw JSON objects
- Introduce openAIToolArguments with custom UnmarshalJSON accepting both string-encoded and raw object forms
- Normalize and re-marshal to OpenAI string form on outbound messages for wire compatibility
- Add unit tests for string, object, null, and streamed tool call round-trip cases
- Register Volcengine Ark as known provider default and list in provider/model docs

### Release
- Bump npm/pypi installer packages to v1.1.63