fix(space-card): nothing in the static schematic is hit-testable (#664)

The stage is pointer-events:none, but that is not an inherited ban: the
shared marker styles opt the 44 px floor (.dev::before) and the painted
capsule (.device-shell-frame) back in for the interactive plan (#564).
The static card imports them whole, so since v1.76.0-beta.2 it showed a
hand cursor over every marker and swallowed clicks that do nothing.

The card now closes every descendant opt-in (.hp-static-stage *, ::before,
::after). smoke_space_card asserts the browser hit test itself
(elementFromPoint over the marker and a 9x9 grid across the stage) and
the cursor, not the stage computed style that stayed green through the
regression. Mutant static-card-descendants-hit-testable.

Screenshots: 11 frames pixel-identical, fingerprint only
(npm run docs:accept -- --identical).

Issue: #664
User-Visible: yes

scripts/mutation-registry.mjs

@@ -3391,6 +3391,17 @@ const MUTANT_DEFINITIONS = [
       replace: "",
     }],
   },
+  {
+    id: 'static-card-descendants-hit-testable',
+    guard: 'node demo/smoke_space_card.mjs',
+    because: '#664: pointer-events:none on the stage does not stop a descendant that opts back in; '
+      + 'without the subtree rule the shared #564 capsule shows a pointer cursor and swallows clicks',
+    patches: [{
+      file: 'src/space-card.ts',
+      find: "      .hp-static-stage *,\n      .hp-static-stage *::before,\n      .hp-static-stage *::after {\n        pointer-events: none;\n      }\n",
+      replace: "",
+    }],
+  },
   {
     id: 'fit-house-hidden-walls-vote',
     guard: 'node demo/smoke_space_card.mjs',