Vacuum: deselect what is blown out, Ctrl + wheel scrolls the bag, Ctrl+click fix (t20)

Blowing out the last of a selected material removes it from the selection,
so an emptied selection picks up what you click again. Ctrl + wheel never
zooms the page and scrolls the bag list under the mouse. A bag click while
Ctrl is held adds to the selection even if the click lacks the Ctrl flag.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/input.js

@@ -68,6 +68,15 @@ canvas.addEventListener('wheel', e => {
   if (e.shiftKey || e.ctrlKey) setBrush(d);
   else { SET.zoom = Math.max(2, Math.min(12, SET.zoom + d)); saveSettings(); resizeRender(); R.snapNext = true; }
 }, { passive: false });
+// Ctrl + wheel would zoom the browser page (Ctrl shows the full bag list): scroll the list under the mouse instead
+window.addEventListener('wheel', e => {
+  if (!e.ctrlKey || e.target === canvas) return;
+  e.preventDefault();
+  for (let n = e.target; n && n !== document.body; n = n.parentElement) {
+    const oy = getComputedStyle(n).overflowY;
+    if ((oy === 'auto' || oy === 'scroll') && n.scrollHeight > n.clientHeight) { n.scrollTop += e.deltaY * (e.deltaMode === 1 ? 16 : e.deltaMode === 2 ? n.clientHeight : 1); break; }
+  }
+}, { passive: false });
 window.addEventListener('resize', () => { if (R.canvas) resizeRender(); });
 document.addEventListener('visibilitychange', () => {
   if (document.hidden && GAME.running) saveWorld('auto', true);