When binding to 0.0.0.0 (--host 0.0.0.0), print "localhost" and
"<host-ip>" URLs instead of the raw 0.0.0.0 address. Also handles
nil TCPAddr.IP to avoid the ":::" garbled display in Docker.
- Fix#11: Guard bcopy/bzero declarations with _VISUALCPP in commoninclude.h
to avoid redefinition errors on macOS where <strings.h> provides them
- Fix#12: Add --host flag to serve command, default 127.0.0.1
Docker now binds to 0.0.0.0 so Colima can reach the server from host
- Also fix truncate() panic when n < 3
- serve.go: embedded web UI (embed.FS), REST API endpoints for
search, list, download (SSE progress), and WAV extraction
- main.go: added serve subcommand and flag registration
- web/ui: vanilla JS frontend with search cards, download queue,
extract controls; dark theme, zero dependencies
- electron/: Electron wrapper that spawns fetch serve as sidecar,
reads port from stdout, creates BrowserWindow; electron-builder
config for macOS .app bundle with akaiutil + script as resources
Refs #1, #9
david