Pass MCP config inline in npm run claude

[mme]

Summary

• Pass MCP config as inline JSON to --mcp-config instead of writing and cleaning up a temp file
• Also supports PORT env var override from prior PR

Test plan

• Run npm run claude — verify Claude starts with mcp-docs tools available
• Run PORT=3002 npm run claude — verify it connects to the correct port

[jpr5]

Closing — the issues this was trying to solve have been fixed differently:

1. OAuth auth failure on newer Claude Code (>= 2.1.80): Root cause was stale OAuth discovery state cached in the macOS Keychain from failed connection attempts. The fix was "headers": {} in the MCP config (tells Claude Code to skip OAuth probing), plus returning 405 instead of 400 on GET /mcp without a session (the SDK expects 405 for "no SSE stream").

2. Claude not using the tools: Fixed by creating a CLAUDE.md in the temp working dir that instructs Claude to use search-breeze-docs and submit-breeze-feedback.

Both fixes are on main. The inline config approach here would lose the "headers": {} and the CLAUDE.md, so it would regress both issues.