Vacuum controls: pick-up modes and separate pick-up and blow marks in the bag (t6, t15)

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

src/sim/progress.js

@@ -27,7 +27,7 @@ const MILESTONES = [
   { id: 'brick', title: 'Fired brick', hint: 'Clay turns into brick after a while above about 900°C, hotter than an open wood fire gets. Blow clay lumps into a coal fire, best walled in like a furnace, and vacuum up the brick rubble. Brick rubble builds brick blocks.', reward: 'Brick insulates far better than stone and survives 1750°C.' },
   { id: 'charcoal', title: 'Charcoal', hint: 'Wood that gets hot without air turns into charcoal instead of burning. Bury a burning pile of wood chunks under dirt, or heat a sealed box of wood chunks from outside.', reward: 'A fuel you can grow: nearly as hot as coal.' },
   { id: 'grow', title: 'Plant a tree', msg: 'Wood is renewable. Plant rows of acorns on dirt to farm it.', hint: 'Cutting down a tree drops acorns. Leave one on dirt or grass under open sky and it sprouts, then grows into a tree in about a minute and a half.' },
-  { id: 'copper', title: 'Molten copper', msg: 'Molten copper sinks to the bottom of the charge. Get it into a mold before it sets.', hint: 'Copper ore melts at 1085°C. An open fire loses too much heat, so wall coal and ore in with blocks and leave a small vent at the top for smoke. Mix ore and coal about half and half: tick both in your bag and pick Ticked mix with Q/E, and right click blows an even mix.' },
+  { id: 'copper', title: 'Molten copper', msg: 'Molten copper sinks to the bottom of the charge. Get it into a mold before it sets.', hint: 'Copper ore melts at 1085°C. An open fire loses too much heat, so wall coal and ore in with blocks and leave a small vent at the top for smoke. Mix ore and coal about half and half: click coal in your bag, then mark copper ore with ⬆. Right click blows an even mix.' },
   { id: 'bars', title: 'Copper bars', msg: 'Bars sell for far more than the ore in them, and make metal wall blocks.', hint: 'Build an Ingot mold (Build, 3) right under the furnace with a floor of clay Grates between them: molten copper drips through, while the charge and the thick slag stay up. When the bars set, they drop out of the bottom of the mold onto whatever is under it; a belt carries them off. Leave space below, or vacuum up the bars. Ingot molds empty themselves: bars, junk and scrap drop below, slag is thrown away and the grate above is raked. Removing any mold returns its set metal to your bag: whole bars as bars, the rest as scrap. Copper that sets in the furnace melts again next firing.' },
   { id: 'bit1', title: 'Copper drill bit', hint: 'Cast copper in a Bit mold. Building the furnace right on top works. A Grate over the funnel keeps the charge out. Let it set, then press F.', reward: 'Copper bit. You can now dig iron ore.' },
   { id: 'auto', title: 'Moving parts', msg: 'Machines can now haul for you. Feed furnaces automatically, and lift ore out of your mines.', hint: 'Belts carry grains and bars resting on them. Screw tubes push loose material along (never liquids); stacked pointing up they lift it out of a mine. A Filter lets one material fall through and carries the rest along, so you can sort ore from rubble. Move 300 grains with machines.' },

src/sim/vacuum.js

@@ -45,7 +45,7 @@ function toolBlow(cx, cy, r, m, mix) {
   let pickM = null;
   if (mix && mix.length) {
     const avail = mix.filter(k => bag[k] > 0 && PH[k] !== PH_ITEM && (PH[k] !== PH_LIQUID || player.flask));
-    if (!avail.length) return { placed: 0, status: 'Tick materials in your bag to mix.' };
+    if (!avail.length) return { placed: 0, status: 'No marked materials left to blow.' };
     pickM = () => { for (let k = 0; k < avail.length; k++) { const c = avail[(blowRR++) % avail.length]; if (bag[c] > 0) return c; } return 0; };
     m = avail[0];
   }