chore: serve static files from dir on dev

internal/routes/routes.go

@@ -33,9 +33,15 @@ func SetupRoutes(a *app.App) http.Handler {
 	)
 
 	// Static assets (bypass router groups — registered directly on mux)
-	sub, _ := fs.Sub(assets.AssetsFS, ".")
+	var assetsFS http.FileSystem
+	if a.Cfg.IsProduction() {
+		sub, _ := fs.Sub(assets.AssetsFS, ".")
+		assetsFS = http.FS(sub)
+	} else {
+		assetsFS = http.Dir("./assets")
+	}
 	r.Mux().Handle("GET /assets/",
-		middleware.CacheStatic(http.StripPrefix("/assets/", http.FileServer(http.FS(sub)))),
+		middleware.CacheStatic(http.StripPrefix("/assets/", http.FileServer(assetsFS))),
 	)
 
 	// Public pages

internal/routes/routes_test.go

@@ -220,6 +220,9 @@ func TestSetupRoutes_NotFound(t *testing.T) {
 func TestSetupRoutes_StaticAssets(t *testing.T) {
 	testutil.ForEachDB(t, func(t *testing.T, dbi testutil.DBInfo) {
 		a := newTestApp(dbi)
+		// Force the embedded-FS branch so the test is independent of CWD;
+		// in dev we serve from ./assets on disk (see SetupRoutes).
+		a.Cfg.AppEnv = "production"
 		handler := SetupRoutes(a)
 
 		req := httptest.NewRequest(http.MethodGet, "/assets/css/output.css", nil)