fix: scope near-axis resize validation

Keep unrelated pre-existing near-axis edges from disabling exact Resize handles, make tracked single-space fixtures visible to the invariants CLI, and add the three missing mutation gates plus real-plan coverage.

Issue: #290
User-Visible: no

scripts/model-invariants.mjs

@@ -516,10 +516,13 @@ export function checkMixedRoleRecords(config) {
   return violations;
 }
 
-/** Разобрать любой из трёх форматов, в которых приходит конфигурация. */
+/** Разобрать runtime-ответы, сырой config и tracked single-space fixtures. */
 export function readModel(text) {
   const parsed = JSON.parse(text);
-  const config = parsed?.payload?.config ?? parsed?.result?.config ?? parsed?.config ?? parsed;
+  const source = parsed?.payload?.config ?? parsed?.result?.config ?? parsed?.config ?? parsed;
+  const config = !Array.isArray(source?.spaces) && parsed?.space
+    ? { spaces: [parsed.space] }
+    : source;
   const layout = parsed?.payload?.layout ?? parsed?.result?.layout ?? parsed?.layout ?? {};
   return { config, layout };
 }

scripts/mutation-gate.mjs

@@ -975,6 +975,42 @@ export const MUTANTS = [
       replace: '    const point = snapped;',
     }],
   },
+  {
+    id: 'near-axis-shared-owner-repair-partial',
+    guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '
+      + '&& node --test --test-name-pattern="#290 repairs a duplicated" test/near-axis.test.mjs',
+    because: 'a shared physical wall must move every coincident room-owner copy atomically (#290)',
+    patches: [{
+      file: 'src/near-axis.ts',
+      find: 'const replaceRoomPoints = (rooms: any[], move: EndpointMove): any[] => rooms.map((room) => {',
+      replace: 'const replaceRoomPoints = (rooms: any[], move: EndpointMove): any[] => rooms.map((room, index) => {\n'
+        + '  if (index > 0) return room;',
+    }],
+  },
+  {
+    id: 'near-axis-shared-owner-double-counted',
+    guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '
+      + '&& node --test --test-name-pattern="#290 repairs a duplicated" test/near-axis.test.mjs',
+    because: 'coincident room-owner copies are one physical wall in the Optimize report (#290)',
+    patches: [{
+      file: 'src/near-axis.ts',
+      find: '      const key = segmentKey(a, b);',
+      replace: '      const key = `${segmentKey(a, b)}:${candidates.size}`;',
+    }],
+  },
+  {
+    id: 'near-axis-optimize-confirmation-bypassed',
+    guard: 'npm run bundle:sync && node demo/smoke_near_axis_optimize.mjs',
+    because: 'opening the Optimize preview or cancelling it must never persist a lossy repair (#290)',
+    patches: [{
+      file: 'src/houseplan-card.ts',
+      find: '  private _openAlignDialog = (): void => this._previewAlignDialog(false);',
+      replace: '  private _openAlignDialog = (): void => {\n'
+        + '    this._previewAlignDialog(false);\n'
+        + '    void this._runAlignToGrid();\n'
+        + '  };',
+    }],
+  },
   {
     id: 'optimizer-micro-interval-cleanup-disabled',
     guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '