fix: waveform zoom buttons - use 1.5x multiplier, show zoom level, remove wheel zoom

js/events.js

@@ -8,6 +8,11 @@ import { resize, screenToWorld } from './renderer.js';
 
 const PAN_SPEED = 40;
 
+function updateWaveZoomLabel() {
+    const el = document.getElementById('wave-zoom-label');
+    if (el) el.textContent = `${state.waveZoom}px`;
+}
+
 export function initEvents() {
     const canvas = document.getElementById('canvas');
 
@@ -214,25 +219,16 @@ export function initEvents() {
     document.getElementById('wave-step').addEventListener('click', manualStep);
 
     document.getElementById('wave-zoom-in').addEventListener('click', () => {
-        state.waveZoom = Math.min(100, state.waveZoom + 5);
+        state.waveZoom = Math.min(100, Math.round(state.waveZoom * 1.5));
+        updateWaveZoomLabel();
     });
     document.getElementById('wave-zoom-out').addEventListener('click', () => {
-        state.waveZoom = Math.max(2, state.waveZoom - 5);
+        state.waveZoom = Math.max(2, Math.round(state.waveZoom / 1.5));
+        updateWaveZoomLabel();
     });
 
-    // Scroll waveform with mouse wheel
-    document.getElementById('wave-canvas').addEventListener('wheel', e => {
-        e.preventDefault();
-        if (e.ctrlKey || e.metaKey) {
-            // Ctrl+wheel = zoom waveform
-            const delta = e.deltaY > 0 ? -3 : 3;
-            state.waveZoom = Math.max(2, Math.min(100, state.waveZoom + delta));
-        } else {
-            // Wheel = scroll waveform horizontally
-            const scrollDelta = e.deltaY > 0 ? 3 : -3;
-            state.waveScroll = Math.max(0, state.waveScroll + scrollDelta);
-        }
-    }, { passive: false });
+    // Init zoom label
+    updateWaveZoomLabel();
 
     // ==================== SIMULATION CONTROLS ====================
     document.getElementById('sim-run-btn').addEventListener('click', () => {