embed web/static into binary via go:embed

Static files are now compiled into the binary using //go:embed.
- Add web/embed.go with //go:embed static directive
- Update server.New() to accept fs.FS parameter
- Switch file server from http.Dir to http.FS

Deployment is now: roadamp.exe + config.yaml + winamp/

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

internal/server/server.go

@@ -8,6 +8,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"io/fs"
 	"log"
 	"net/http"
 	"os"
@@ -53,14 +54,15 @@ func loadConfig(path string) (Config, error) {
 // ── Server ────────────────────────────────────────────────────────────────────
 
 type Server struct {
-	cfg  Config
-	wa   *winamp.Controller
-	kl   *killist.KillList
-	hub  *hub
-	mux  *http.ServeMux
+	cfg      Config
+	wa       *winamp.Controller
+	kl       *killist.KillList
+	hub      *hub
+	mux      *http.ServeMux
+	staticFS fs.FS
 }
 
-func New(configPath string) (*Server, error) {
+func New(configPath string, staticFS fs.FS) (*Server, error) {
 	cfg, err := loadConfig(configPath)
 	if err != nil {
 		return nil, fmt.Errorf("config: %w", err)
@@ -69,7 +71,7 @@ func New(configPath string) (*Server, error) {
 	if err != nil {
 		return nil, fmt.Errorf("killist: %w", err)
 	}
-	s := &Server{cfg: cfg, wa: winamp.New(), kl: kl, mux: http.NewServeMux()}
+	s := &Server{cfg: cfg, wa: winamp.New(), kl: kl, mux: http.NewServeMux(), staticFS: staticFS}
 	s.hub = newHub(s.handleCommand)
 	s.routes()
 	return s, nil
@@ -90,7 +92,7 @@ func (s *Server) Run() error {
 // ── Routes ────────────────────────────────────────────────────────────────────
 
 func (s *Server) routes() {
-	s.mux.Handle("/", http.FileServer(http.Dir("web/static")))
+	s.mux.Handle("/", http.FileServer(http.FS(s.staticFS)))
 
 	// WebSocket (primary interface)
 	s.mux.HandleFunc("/ws", s.handleWS)

web/embed.go

@@ -0,0 +1,7 @@
+// Package web embeds the frontend static files into the binary.
+package web
+
+import "embed"
+
+//go:embed static
+var FS embed.FS