Use non-interactive npx launch commands for MCP configs

[spqw]

Summary

The generated and documented MCP launch commands use plain npx @blitzdev/iphone-mcp for Claude Code, Cursor, and Codex.

Problem

Plain npx can prompt on first install or cache miss. That is a poor fit for MCP stdio startup, which should remain non-interactive.

Proposed fix

Use npx -y @blitzdev/iphone-mcp consistently in generated configs and README examples.

Expected impact

MCP launches become non-interactive and more reliable across clients.