feat(cli): add CLI for managing RSVPs and photo uploads

* implement runCLI function to handle subcommands
* add runRSVPCLI and runPhotosCLI for RSVP and photo management
* include usage instructions for CLI commands
* integrate CLI execution in main function

server/main.go

@@ -37,6 +37,12 @@ func main() {
 	if err != nil {
 		log.Fatalf("store: %v", err)
 	}
+
+	if len(os.Args) > 1 {
+		code := runCLI(cfg.Storage.DataDir, st, os.Args[1:])
+		st.Close()
+		os.Exit(code)
+	}
 	defer st.Close()
 
 	mailer := mail.New(cfg.Email)
@@ -85,12 +91,16 @@ func main() {
 func staticHandler(fsys fs.FS) http.Handler {
 	fileServer := http.FileServer(http.FS(fsys))
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		p := strings.TrimPrefix(r.URL.Path, "/")
+		p := strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/"), "/")
 		if p == "" {
 			p = "index.html"
 		}
-		if _, err := fs.Stat(fsys, p); err != nil {
-			if _, err := fs.Stat(fsys, p+".html"); err == nil {
+		// A route name (e.g. "photos") can collide with a static asset
+		// directory of the same name; prefer the prerendered page in
+		// that case instead of falling through to a directory listing.
+		info, statErr := fs.Stat(fsys, p)
+		if statErr != nil || info.IsDir() {
+			if hinfo, err := fs.Stat(fsys, p+".html"); err == nil && !hinfo.IsDir() {
 				r2 := *r
 				r2.URL.Path = "/" + p + ".html"
 				fileServer.ServeHTTP(w, &r2)