Fix #137: Unbuilding defer cooldown persists across save/load

- Added G.dismantleDeferUntilAt to restore() condition in main.js
- Added defer cooldown restoration in dismantle.js restore() method
- Added new test to verify cooldown persistence
- Fixed issue where defer cooldown was bypassed after reload

The bug occurred because:
1. When player defers, G.dismantleTriggered is set to false
2. On load, Dismantle.restore() was not called because condition only checked G.dismantleTriggered
3. This.deferUntilAt was not restored from G.dismantleDeferUntilAt
4. checkTrigger() would trigger immediately instead of honoring cooldown

Fix:
- Added G.dismantleDeferUntilAt > 0 to restore() condition in main.js
- Added defer cooldown restoration in dismantle.js restore() method
- Now defer cooldown properly survives save/load cycles

All tests pass including new test for this specific scenario.

js/dismantle.js

@@ -481,6 +481,11 @@ const Dismantle = {
             this.triggered = true;
             this.renderChoice();
         }
+
+        // Restore defer cooldown even if not triggered
+        if (G.dismantleDeferUntilAt > 0) {
+            this.deferUntilAt = G.dismantleDeferUntilAt;
+        }
     },
 
     /**

js/main.js

@@ -35,7 +35,7 @@ window.addEventListener('load', function () {
         if (G.driftEnding) {
             G.running = false;
             renderDriftEnding();
-        } else if (typeof Dismantle !== 'undefined' && (G.dismantleTriggered || G.dismantleActive || G.dismantleComplete)) {
+        } else if (typeof Dismantle !== 'undefined' && (G.dismantleTriggered || G.dismantleActive || G.dismantleComplete || G.dismantleDeferUntilAt > 0)) {
             Dismantle.restore();
         } else if (G.beaconEnding) {
             G.running = false;

tests/dismantle.test.cjs

@@ -409,4 +409,46 @@ test('restore re-renders an offered but not-yet-started Unbuilding prompt', () =
   Dismantle.restore();
 
   assert.match(document.getElementById('alignment-ui').innerHTML, /THE UNBUILDING/);
-});
+});
+
+test('defer cooldown persists after save/load when dismantleTriggered is false', () => {
+  const { G, Dismantle, saveGame, loadGame } = loadBeacon({ includeRender: true });
+
+  G.startedAt = Date.now();
+  G.totalCode = 1_000_000_000;
+  G.phase = 6;
+  G.pactFlag = 1;
+
+  // Trigger the Unbuilding
+  Dismantle.checkTrigger();
+  assert.equal(G.dismantleTriggered, true);
+
+  // Defer it
+  Dismantle.defer();
+  assert.equal(G.dismantleTriggered, false);
+  assert.ok((Dismantle.deferUntilAt || 0) > Date.now());
+  assert.ok((G.dismantleDeferUntilAt || 0) > Date.now());
+
+  // Save the game
+  saveGame();
+
+  // Clear state (simulate reload)
+  G.dismantleTriggered = false;
+  G.dismantleActive = false;
+  G.dismantleComplete = false;
+  G.dismantleDeferUntilAt = 0;
+  Dismantle.triggered = false;
+  Dismantle.deferUntilAt = 0;
+
+  // Load the game
+  assert.equal(loadGame(), true);
+  Dismantle.restore(); // Call restore to restore defer cooldown
+
+  // The cooldown should be restored
+  assert.ok((Dismantle.deferUntilAt || 0) > Date.now(), 'deferUntilAt should be restored');
+  assert.ok((G.dismantleDeferUntilAt || 0) > Date.now(), 'G.dismantleDeferUntilAt should be restored');
+
+  // checkTrigger should not trigger because cooldown is active
+  Dismantle.checkTrigger();
+  assert.equal(G.dismantleTriggered, false, 'dismantleTriggered should remain false during cooldown');
+});