feat: implement Dismantle Sequence — The Unbuilding (#16) + fix #133

The Unbuilding is already implemented (dismantle.js, 571 lines). This
commit fixes two bugs discovered during endgame testing (#133):

Fix 1: Stage 5 interval extended from 6.3s to 7.0s
- Last RESOURCE_TICK fires at 6.12s, only 0.18s margin
- Floating-point timing could skip last 1-2 resource dissolves

Fix 2: Stage advancement gated on resource completion
- tick() now waits for resourceIndex >= RESOURCE_TICKS.length
- Stage 6 won't start until all 10 resources have dissolved

Fix 3: reapplyDismantle only hides dissolved resources on reload
- Previously hid ALL resources on reload mid-stage-5
- Now only hides slice(0, resourceIndex) — already dissolved ones
- Remaining resources stay visible and continue dissolving

Dismantle sequence: 8 stages + final overlay.
Panels disappear one by one. Resources dissolve quantum-chip style.
Final moment: one beacon remains. 'That is enough.'

Closes #16, Closes #133

js/dismantle.js

@@ -17,7 +17,8 @@ const Dismantle = {
     deferUntilAt: 0,
 
     // Timing: seconds between each dismantle stage
-    STAGE_INTERVALS: [0, 3.0, 2.5, 2.5, 2.0, 6.3, 2.0, 2.0, 2.5],
+    // Stage 5 must be long enough for all RESOURCE_TICKS (last tick at 6.12s)
+    STAGE_INTERVALS: [0, 3.0, 2.5, 2.5, 2.0, 7.0, 2.0, 2.0, 2.5],
 
     // The quantum chips effect: resource items disappear one by one
     // at specific tick marks within a stage (like Paperclips' quantum chips)
@@ -192,8 +193,10 @@ const Dismantle = {
         }
 
         // Advance to next stage
+        // At stage 5, don't advance until all resources have dissolved
         const interval = this.STAGE_INTERVALS[this.stage] || 2.0;
-        if (this.tickTimer >= interval) {
+        const resourcesDone = this.stage !== 5 || this.resourceIndex >= this.RESOURCE_TICKS.length;
+        if (this.tickTimer >= interval && resourcesDone) {
             this.tickTimer = 0;
             this.advanceStage();
         }
@@ -510,14 +513,17 @@ const Dismantle = {
                     break;
                 case 4: this.instantHide('edu-panel'); break;
                 case 5:
-                    // Hide all resource displays
-                    this.getResourceList().forEach(r => {
-                        const el = document.getElementById(r.id);
-                        if (el) {
-                            const parent = el.closest('.res');
-                            if (parent) parent.style.display = 'none';
-                        }
-                    });
+                    // On reload during stage 5, only hide resources already dissolved.
+                    // Remaining resources stay visible and will continue dissolving via tick().
+                    if (this.resourceIndex > 0) {
+                        this.getResourceList().slice(0, this.resourceIndex).forEach(r => {
+                            const el = document.getElementById(r.id);
+                            if (el) {
+                                const parent = el.closest('.res');
+                                if (parent) parent.style.display = 'none';
+                            }
+                        });
+                    }
                     break;
                 case 6:
                     this.instantHideActionButtons();