fix: seven small honesty fixes from the 29.08 audit (#369)

(a) documented: deleting a vacuum marker erases its server trail at once
and a re-added marker starts from scratch (VACUUM.md + both USER-GUIDEs).
(b) smoothVacPath reports dropped non-finite segments — one console warn
per call with the count — instead of hiding the whole trail silently on a
broken calibration matrix. (c) room climate (#317) now reaches legacy
markers whose exported config carries an ABSENT area key rather than an
explicit null: `== null` where the placement is decided. (d) the armed
furniture preview follows Shift without mouse movement — window
keydown/keyup listeners live exactly as long as the palette is armed,
detached at every palette teardown. (e) only the primary mouse button
places decor/furniture: a right or middle click with an armed tool is a
no-op, touch/pen untouched. (f) a device whose registry entities were ALL
deliberately disabled by the user no longer glows as an alive controller —
the #318 entityless-active rule now requires a genuinely empty roster.
(g) furniture-pack author corrected to Sergey Matyunin (Сергей Матюнин)
per the owner's decision — LICENSE.md, README.md, pack.json,
docs/FURNITURE.md, the provenance check in generate-furniture-assets and
its unit; the source archive bytes are unchanged and the README notes the
romanisation fix.

Proofs: units for (b)/(c)/(f) including the #318 regression pair; new
smoke_furniture_polish for (d)/(e) with listener add/remove counters and
both mouse buttons; five registry mutants, one per code change.

Issue: #369
User-Visible: yes

demo/smoke_furniture_polish.mjs

@@ -0,0 +1,103 @@
+// #369(д)(е): the armed furniture preview follows Shift without mouse motion,
+// its window listeners come and go with the palette, and only the primary
+// mouse button places objects — a right-click with an armed tool is a no-op.
+import { launch, checkAll, finish } from './serve.mjs';
+const { page, browser } = await launch();
+const out = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  const sr = () => c.shadowRoot || c.renderRoot;
+  const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
+  const stageEl = () => sr().querySelector('.stage');
+  const toScreen = (x, y) => {
+    const r = stageEl().getBoundingClientRect();
+    const v = c._viewOr(c._baseVb());
+    return [r.left + ((x - v.x) / v.w) * r.width, r.top + ((y - v.y) / v.h) * r.width * (v.h / v.w) * (r.height / (r.width * (v.h / v.w)))];
+  };
+  // счётчики слушателей окна
+  const addReal = window.addEventListener.bind(window);
+  const removeReal = window.removeEventListener.bind(window);
+  let shiftAdds = 0; let shiftRemoves = 0;
+  window.addEventListener = (type, fn, opts) => {
+    if (type === 'keydown' || type === 'keyup') shiftAdds++;
+    return addReal(type, fn, opts);
+  };
+  window.removeEventListener = (type, fn, opts) => {
+    if (type === 'keydown' || type === 'keyup') shiftRemoves++;
+    return removeReal(type, fn, opts);
+  };
+
+  // в декор-режим, инструмент «мебель», выбрать символ
+  await c._requestMode('decor', false);
+  await c.updateComplete;
+  c._editorSecondary.openPalette?.();
+  c._decorTool = 'furniture';
+  c._furnPalette = null; c._furnCategory = null;
+  c.requestUpdate(); await c.updateComplete;
+  const pal = () => sr().querySelector('.furnpalette');
+  pal()?.querySelector('.furnitem[data-category="sofa"]')?.click();
+  await c.updateComplete;
+  pal()?.querySelector('.furnitem[data-symbol="sofa"]')?.click();
+  await c.updateComplete;
+  out.symbolArmed = !!c._furnPalette;
+  out.listenersAttached = shiftAdds >= 2;
+
+  // превью от движения мыши
+  const stage = stageEl();
+  const rect = stage.getBoundingClientRect();
+  const cx = rect.left + rect.width * 0.5;
+  const cy = rect.top + rect.height * 0.55;
+  stage.dispatchEvent(new PointerEvent('pointermove', {
+    bubbles: true, composed: true, pointerType: 'mouse', pointerId: 7,
+    clientX: cx, clientY: cy,
+  }));
+  await c.updateComplete;
+  out.previewVisible = !!c._furnPreviewInput;
+  out.previewStartsSnapped = c._furnPreviewInput?.free === false;
+
+  // (д): Shift БЕЗ движения мыши переводит превью в free и обратно
+  window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Shift', bubbles: true }));
+  await c.updateComplete;
+  out.shiftDownGoesFree = c._furnPreviewInput?.free === true;
+  window.dispatchEvent(new KeyboardEvent('keyup', { key: 'Shift', bubbles: true }));
+  await c.updateComplete;
+  out.shiftUpBacksToSnap = c._furnPreviewInput?.free === false;
+
+  // (е): правый клик с armed-символом НЕ ставит мебель
+  const beforeCount = c._decorList.length;
+  stage.dispatchEvent(new PointerEvent('pointerdown', {
+    bubbles: true, composed: true, pointerType: 'mouse', pointerId: 8,
+    clientX: cx, clientY: cy, button: 2, buttons: 2,
+  }));
+  await c.updateComplete; await sleep(50);
+  out.rightClickPlacesNothing = c._decorList.length === beforeCount
+    && !!c._furnPalette;
+
+  // левый клик — ставит (регресс)
+  stage.dispatchEvent(new PointerEvent('pointerdown', {
+    bubbles: true, composed: true, pointerType: 'mouse', pointerId: 9,
+    clientX: cx, clientY: cy, button: 0, buttons: 1,
+  }));
+  await c.updateComplete; await sleep(50);
+  out.leftClickPlaces = c._decorList.length === beforeCount + 1;
+
+  // (д): после установки палитра погашена — слушатели сняты симметрично
+  out.paletteDisarmed = !c._furnPalette;
+  out.listenersDetached = shiftRemoves >= 2 && shiftRemoves === shiftAdds;
+
+  // Shift после снятия — не трогает ничего (превью нет)
+  window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Shift', bubbles: true }));
+  out.shiftAfterDetachIsInert = !c._furnPreviewInput;
+  window.dispatchEvent(new KeyboardEvent('keyup', { key: 'Shift', bubbles: true }));
+
+  window.addEventListener = addReal;
+  window.removeEventListener = removeReal;
+  // прибрать поставленный диван
+  const sp = c._curSpaceCfg;
+  sp.decor = sp.decor.slice(0, beforeCount);
+  c._decorSel = null;
+  c.requestUpdate(); await c.updateComplete;
+  return out;
+});
+checkAll(out);
+await finish(browser, out);