Add MCP config tab with stdio-to-SSE bridge

[chrysb]

Summary

• Adds a new "MCP" tab under Config in the sidebar for managing the OpenCLAW MCP server bridge
• Implements a stdio-to-SSE bridge (mcp-bridge.js) that spawns openclaw mcp serve server-side and exposes it over HTTP endpoints (/mcp/sse, /mcp/message) so remote MCP clients (Cursor, Claude Desktop) can connect
• Provides start/stop controls, live status display, a copyable client config JSON snippet (auto-filled with the host URL and gateway token), and a reference list of the 9 available MCP tools

Test plan

• Verify "MCP" appears in the sidebar under Config with the plug icon
• Click Start — bridge process spawns, status turns green
• Copy config snippet and paste into an MCP client (Cursor/Claude Desktop)
• Verify MCP tools are accessible and functional through the SSE bridge
• Click Stop — bridge stops, status turns red

🤖 Generated with Claude Code