os.Create truncates the target immediately; a failed write or flush
leaves the file empty/corrupt. Write to a temp file in the same
directory, flush, close, then os.Rename — the rename is atomic on
Windows (same volume). Also check WriteString return values.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Go HTTP server with Winamp IPC via WM_USER/WM_COMMAND
- internal/winamp: TWinampControl port (play/pause/stop/seek/volume/title/playlist)
- internal/killist: persistent skip-list (port of Delphi KillFile feature)
- internal/resume: JSON-based resume state (port of Delphi resume.dat)
- internal/server: HTTP API + background killist checker + resume restore
- web/static: mobile-first touch UI (dark theme, progress bar, seek buttons)
- config.yaml.example for winamp path / port / file paths

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>