title: Fix stdio multi-account session binding

issue_type: task

created_by: Taylor Wilsdon


title: Implement CLI mode for Workspace MCP

description:
Create a CLI mode for the Workspace MCP server, activated via --cli flag, that allows all tools to be used directly from the command line without running as an MCP server.

**Goals:**
- Add --cli startup flag to enable CLI mode
- Expose all existing tools as CLI subcommands
- No changes to individual tool implementations - reuse existing code
- Lightweight and flexible design
- Enable usage by coding agents (Codex, Claude Code) without MCP server overhead

**Requirements:**
- Parse tool name and arguments from command line
- Route to existing tool handlers
- Output results to stdout (JSON or human-readable)
- Maintain same authentication/credential flow
- Support all current tools without modification