feat: UI sounds, live LFO visualization, wire fix, worlds 7-12, bug fixes

- Add procedural UI sound effects (connect/disconnect, engine start/stop,
  level complete/fail, star earned, hint, navigation) via Tone.js
- Live LFO modulation visualization: knobs animate in real-time showing
  modulated value, ghost dot shows base value, number glows cyan
- Fix wire recalculation on zoom/pan/level re-entry (post-layout refresh)
- Fix retry button to keep current patch instead of reloading level
- Fix default param detection: newly added modules now populate all
  default params so level checkers work without manual param changes
- Add worlds 7-12: Secuencias y Ritmos, Texturas de Ruido, Síntesis
  Sustractiva, Espacio y Stereo, Técnicas Avanzadas, Gran Final
  (48 new levels, 144 new possible stars, 288 total stars)

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

src/index.css

@@ -188,6 +188,18 @@ html, body, #root {
 .knob-container.knob-modulated + .param-value {
   color: var(--accent2);
 }
+/* Ghost dot showing base value position while modulated */
+.knob-base-dot {
+  fill: var(--text2);
+  opacity: 0.4;
+}
+/* Live modulation number — highlight color + subtle glow */
+.param-value-live {
+  color: var(--accent) !important;
+  text-shadow: 0 0 6px rgba(0, 229, 255, 0.5);
+  font-variant-numeric: tabular-nums;
+  transition: none;
+}
 
 .knob-editing { display: flex; align-items: center; justify-content: center; }
 .knob-input {