feat: улучшить измерения при Resize

Issue: #300
User-Visible: yes

scripts/mutation-gate.mjs

@@ -385,6 +385,53 @@ export const MUTANTS = [
       replace: '  const span = centre;',
     }],
   },
+  {
+    id: 'resize-labels-drops-measured-edge',
+    guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '
+      + '&& node --test test/resize-labels.test.mjs',
+    because: 'each of the two remaining length badges must retain a matching side-wall '
+      + 'highlight; duplicating one edge silently drops the other measurement (#300)',
+    patches: [{
+      file: 'src/resize-labels.ts',
+      find: '  return [(movingEdge - 1 + n) % n, (movingEdge + 1) % n];',
+      replace: '  return [(movingEdge - 1 + n) % n, (movingEdge - 1 + n) % n];',
+    }],
+  },
+  {
+    id: 'resize-labels-same-side-areas',
+    guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '
+      + '&& node --test test/resize-labels.test.mjs',
+    because: 'the inward side must follow polygon winding; a shared wall needs its two room '
+      + 'areas on opposite sides instead of stacked together (#300)',
+    patches: [{
+      file: 'src/resize-labels.ts',
+      find: '  return signedArea(poly) >= 0\n',
+      replace: '  return true\n',
+    }],
+  },
+  {
+    id: 'resize-labels-ignore-gear-collision',
+    guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '
+      + '&& node --test test/resize-labels.test.mjs',
+    because: 'a visible room-settings button must move the area badge tangentially at current '
+      + 'zoom; keeping the nominal position recreates the overlap (#300)',
+    patches: [{
+      file: 'src/resize-labels.ts',
+      find: '  if (collides(0)) {',
+      replace: '  if (false && collides(0)) {',
+    }],
+  },
+  {
+    id: 'resize-labels-hide-narrow-area',
+    guard: 'node demo/smoke_resize_labels.mjs',
+    because: 'the owner chose always-visible area labels; keeping only one owner in a narrow '
+      + 'shared fixture loses the second room instead of using its leader (#300)',
+    patches: [{
+      file: 'src/houseplan-card.ts',
+      find: '    for (const id of ids) {\n      const poly = res.polys[id]',
+      replace: '    for (const id of ids.slice(0, 1)) {\n      const poly = res.polys[id]',
+    }],
+  },
   {
     id: 'resize-wall-partial-overlap-not-split',
     guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '

scripts/smoke-links.mjs

@@ -27,6 +27,15 @@
 
 /** @type {SmokeLink[]} */
 export const SMOKE_LINKS = [
+  {
+    symbols: [
+      'placeResizeAreaLabel', 'resizeInwardNormal', 'resizeMeasuredEdges',
+      'ResizeAreaPlacement', 'ResizeAreaPlacementInput', 'ResizeLabelView',
+    ],
+    smokes: ['smoke_resize_labels.mjs'],
+    because: 'the #300 production gesture observes the pure projection only through the '
+      + 'rendered side-wall highlights, area/leader DOM and actual gear rectangles at current zoom',
+  },
   {
     symbols: [
       'classifyNearAxisSegment', 'snapNearAxisEndpoint', 'repairNearAxisRoomWalls',