feat: refactor MCP tools to use terminal names instead of IDs
- Replace terminalId parameter with terminalName across all tools
- Add window name uniqueness validation for create/rename operations
- Implement terminal name-to-window resolution in all MCP tools
- Add home directory tilde expansion in working directory paths
- Update terminal resources to use encoded names in URIs
- Remove terminal IDs from API responses (list-terminals, resources)
- Add type checking and error handling for Python agent
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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