fix v1.28.1: openings fully inert in View mode

- op-hit: pointer-events none + default cursor by default; interactive (grab,
  hover outline, drag) only inside Plan; lock badge is a pure indicator
- opening click edits in Plan with any tool; no interaction whatsoever in View
- smoke_inert_openings.mjs; TESTING.md updated

demo/smoke_inert_openings.mjs

@@ -0,0 +1,30 @@
+import { launch } from './serve.mjs';
+const { page, browser } = await launch();
+const res = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  const sr = () => c.shadowRoot || c.renderRoot;
+  // добавить открывание на f1
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== 'f1' ? s : ({
+    ...s, openings: [{ id: 'op1', type: 'door', rx: 550, ry: 200, angle: 90, len_cm: 90 }] })) };
+  c.requestUpdate(); await c.updateComplete;
+  const hit = sr().querySelector('.op-hit');
+  out.hasOpening = !!hit;
+  const cs = hit ? getComputedStyle(hit) : null;
+  out.viewInert = cs ? cs.pointerEvents === 'none' && cs.cursor === 'default' : null;
+  out.lockBadgeInert = (() => { const l = sr().querySelector('.oplock'); return l ? getComputedStyle(l).pointerEvents === 'none' : 'no-badge'; })();
+  // View: клик по открыванию ничего не открывает
+  c._opClick({ stopPropagation(){} }, { id: 'op1', rx: 550, ry: 200, rlen: 90 });
+  out.viewClickNoop = !c._openingInfo && !c._openingDialog;
+  // Plan: op-hit интерактивен, клик редактирует
+  c._setMode('plan'); await c.updateComplete;
+  const cs2 = getComputedStyle(sr().querySelector('.op-hit'));
+  out.planInteractive = cs2.pointerEvents === 'auto' && cs2.cursor === 'grab';
+  const op = c._spaceModel().openings?.[0] || { id: 'op1', rx: 550, ry: 200, rlen: 90 };
+  c._opClick({ stopPropagation(){} }, op);
+  out.planClickEdits = !!c._openingDialog;
+  c._openingDialog = null; c._setMode('view');
+  return out;
+});
+console.log(JSON.stringify(res, null, 1));
+await browser.close();