Add guard functions to check if Claude/Codex/Gemini CLI has been
initialized before attempting to sync MCP configurations. This prevents
creating unwanted config files in directories that don't exist.
- Claude: check ~/.claude dir OR ~/.claude.json file exists
- Codex: check ~/.codex dir exists
- Gemini: check ~/.gemini dir exists
When the target app is not installed, sync operations now silently
succeed without writing any files, allowing users to manage MCP servers
for apps they actually use without side effects on others.
- Remove server from live config when app is disabled during upsert
- Merge enabled flags instead of overwriting when importing from multiple apps
- Normalize Gemini MCP type field (url-only → sse, command → stdio)
- Use atomic write for Codex config updates
- Add tests for disable-removal, multi-app merge, and Gemini SSE import
lif