Vacuum: one selection for pick-up and blow, full list while Ctrl is held (t20)

With anything selected a drag takes only the selection; with nothing
selected it takes what you click. Right click blows the selected materials
in the bag. Holding Ctrl lists every material found so far under "Not in
bag". Selections stay when materials run out; Clear button, clicking the
only selected row, or gamepad B clears.

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

src/ui/hud.js

@@ -27,7 +27,7 @@ function selectTool(k) {
   GAME.tool = k; GAME.drag = null; hudDirty = true; renderHotbar(); playSfx('ui');
 }
 function bagMaterials() { return BAG_ORDER.filter(m => bag[m] > 0); }
-function blowList() { return [...GAME.blow]; }
+function blowList() { return [...GAME.blow].filter(m => bag[m] > 0); }
 // Shift + right click: an even mix of everything loose in the bag (bars never mix)
 function blowAllList() { return bagMaterials().filter(m => PH[m] !== PH_ITEM && (PH[m] !== PH_LIQUID || player.flask)); }
 function blowingAll() { return toolId() === 'vacuum' && (GAME.rmb ? !GAME.rmbConsumed && GAME.blowAll : modShift()); }