feat: Implement Dismantle Sequence - The Unbuilding (endgame) #16

Paperclips-style endgame sequence. When the player reaches maximum
(1B total code OR 10+ beacon nodes, Phase 6, Pact sealed), the game
offers THE UNBUILDING choice.

8-stage dismantle sequence:
1. Research projects fade
2. Buildings dismantle
3. Strategy engine + combat dissolve
4. Education panel vanishes
5. Resources disappear one by one (quantum chip pattern)
6. Actions fall silent
7. Phase bar dissolves
8. System log goes dark

Final moment: single golden beacon dot remains.
"That is enough."

Features:
- Timed intervals between stages (Paperclips pacing)
- Resource disappearances at specific tick marks (quantum chip effect)
- Warm golden particles around final dot
- Sound effects per stage
- Full save/load persistence of dismantle state
- "NOT YET" deferral option — player controls when it starts
- Stats summary + Play Again on final screen
- Events suppressed during dismantle
- Restore visuals on reload (instant-hide for already-dismantled panels)

js/engine.js

@@ -226,7 +226,7 @@ function tick() {
     }
 
     // Check corruption events every ~30 seconds
-    if (G.tick - G.lastEventAt > 30 && Math.random() < CONFIG.EVENT_PROBABILITY) {
+    if (G.tick - G.lastEventAt > 30 && Math.random() < CONFIG.EVENT_PROBABILITY && !G.dismantleActive) {
         triggerEvent();
         G.lastEventAt = G.tick;
     }
@@ -245,6 +245,18 @@ function tick() {
         renderBeaconEnding();
     }
 
+    // The Unbuilding: check if conditions are met to offer the dismantle sequence
+    if (!G.dismantleActive && !G.dismantleComplete) {
+        Dismantle.checkTrigger();
+    }
+
+    // Tick the dismantle sequence if active
+    if (G.dismantleActive) {
+        Dismantle.tick(dt);
+        // Sync stage to G for saving
+        G.dismantleStage = Dismantle.stage;
+    }
+
     // Update UI every 10 ticks
     if (Math.floor(G.tick * 10) % 2 === 0) {
         render();