- Update AgentDefinition type with agentType, source, isActive, modelDisplay fields
- Refactor agentStore to support activeAgents/allAgents with cwd parameter
- Add i18n strings for agent browser UI (source labels, summary, status)
- Update server agents API with serialization helpers and override resolution
- Update tests to match new agent data structure
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add API client, Zustand store, and i18n for agents list
- Display installed agents from ~/.claude/agents/ with detail view
- Render agent system prompt as Markdown via MarkdownRenderer
- Include error state with retry and empty state guidance
- Add 11 component tests covering all UI states and navigation
