Improve web UI sound deployment

static/skald.js

@@ -265,6 +265,7 @@ function reflectSettings() {
 /** @type {AudioContext} */
 let notificationAudioContext = null;
 let userNotificationSoundsReady = false;
+let notificationSoundGainScale = 2.5;
 
 function notificationSoundsEnabled() {
     return !!getSettings().notificationSounds;
@@ -309,7 +310,9 @@ function scheduleGlide(start, duration, fromFrequency, toFrequency, gainValue, t
     oscillator.frequency.setValueAtTime(fromFrequency, start);
     oscillator.frequency.exponentialRampToValueAtTime(toFrequency, start + duration);
     gain.gain.setValueAtTime(0, start);
-    gain.gain.linearRampToValueAtTime(gainValue, start + 0.02);
+    gain.gain.linearRampToValueAtTime(
+        gainValue * notificationSoundGainScale, start + 0.02,
+    );
     gain.gain.exponentialRampToValueAtTime(0.0001, start + duration);
     oscillator.connect(gain);
     gain.connect(context.destination);
@@ -335,7 +338,9 @@ function scheduleTone(offset, duration, frequency, gainValue, type) {
     oscillator.type = type || 'sine';
     oscillator.frequency.setValueAtTime(frequency, start);
     gain.gain.setValueAtTime(0, start);
-    gain.gain.linearRampToValueAtTime(gainValue, start + 0.015);
+    gain.gain.linearRampToValueAtTime(
+        gainValue * notificationSoundGainScale, start + 0.015,
+    );
     gain.gain.exponentialRampToValueAtTime(0.0001, start + duration);
     oscillator.connect(gain);
     gain.connect(context.destination);

webserver/webserver.go

@@ -193,11 +193,22 @@ func makeCachable(w http.ResponseWriter, p string, fi os.FileInfo, cachable bool
 	cc := normalCacheControl
 	if strings.HasPrefix(p, "/third-party/") {
 		cc = veryCachableCacheControl
+	} else if isFirstPartyWebAsset(p) {
+		cc = "no-cache"
 	}
 
 	w.Header().Set("Cache-Control", cc)
 }
 
+func isFirstPartyWebAsset(p string) bool {
+	switch path.Ext(p) {
+	case ".css", ".html", ".js":
+		return true
+	default:
+		return false
+	}
+}
+
 // fileHandler is our custom reimplementation of http.FileServer
 type fileHandler struct {
 	root http.FileSystem