v1.50.4: one model builder for both cards (HP-1503-01)

The full card's _buildModel() was a hand-copied twin of spaceModels(), and
the twin missed the legacy-store fallbacks v1.50.3 gave the shared builder —
the same broken store rendered recovered in the static card and as
viewBox='0 0 0 0' with negative-width rects in the main one. The divergence
of the duplicates IS the bug, so the duplicate is gone: the full card calls
spaceModels() and only swaps the raw plan url back in (its signing flow must
not bake a signed url into a memoized model — 2026-07-27).

New smoke_legacy_geometry runs the audit's exact vector (zero viewport +
negative rect) through both models and both DOM trees and asserts parity:
full-canvas fallback, normalised rectangle, no negative SVG attributes.
Inventory: 140 / 51 / 43 / 65.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "houseplan-card",
-  "version": "1.50.3",
+  "version": "1.50.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "houseplan-card",
-      "version": "1.50.3",
+      "version": "1.50.4",
       "license": "MIT",
       "dependencies": {
         "lit": "^3.1.3",