introduce controlled asset randomness: implement shuffled asset bag logic for balanced and repeatable asset spawning

cmd/client/web/game.js

@@ -27,6 +27,7 @@ let presiAssets = [];
 let presiPlayers = new Map();
 let presiQuoteInterval = null;
 let presiAssetInterval = null;
+let presiAssetBag = []; // Shuffled bag for controlled randomness
 
 // Central UI State Manager
 function setUIState(newState) {
@@ -982,10 +983,21 @@ async function spawnPresiAsset() {
     const track = document.querySelector('.presi-assets-track');
     if (!track) return;
 
-    const assetKeys = Object.keys(assetsManifest).filter(k => 
-        ['player', 'coin', 'eraser', 'pc-trash', 'godmode', 'jumpboost', 'magnet', 'baskeball', 'desk'].includes(k)
-    );
-    const key = assetKeys[Math.floor(Math.random() * assetKeys.length)];
+    // Refill the bag if empty
+    if (presiAssetBag.length === 0) {
+        const assetKeys = Object.keys(assetsManifest).filter(k => 
+            ['player', 'coin', 'eraser', 'pc-trash', 'godmode', 'jumpboost', 'magnet', 'baskeball', 'desk'].includes(k)
+        );
+        // Add each asset twice for a longer cycle
+        presiAssetBag = [...assetKeys, ...assetKeys]; 
+        // Shuffle
+        for (let i = presiAssetBag.length - 1; i > 0; i--) {
+            const j = Math.floor(Math.random() * (i + 1));
+            [presiAssetBag[i], presiAssetBag[j]] = [presiAssetBag[j], presiAssetBag[i]];
+        }
+    }
+
+    const key = presiAssetBag.pop();
     const def = assetsManifest[key];
 
     const el = document.createElement('div');