Add freshness bar, enhance overlays and renderers

- Add enemy freshness tracking (novelty bonus for repeated deploys)
- Add freshness bar to sidepanel enemy cards with penalty indicator
- Major overhaul of renderer-overlays.js (790+ lines for UI polish)
- Enhanced combat log, shop overlays, and inventory UI
- Improved weapon/upgrade display with partial ownership colors
- Added element icons and weakness/resistance indicators to cards
- Enhanced radial menu and tooltip system
- Add "stale/%" penalty text when freshness depleted
- Update play link to ffazeshift.net in index.html

js/elements.js

@@ -73,6 +73,7 @@ function applyFreeze(enemy, duration) {
   // Diminishing returns: each successive freeze is shorter
   // 60-frame immunity window after thawing
   if (enemy._freezeImmune > 0) return;
+  if (enemy.immuneToFreeze) return;
   const diminish = enemy._freezeCount ? Math.pow(0.75, enemy._freezeCount) : 1.0;
   const actual = Math.max(30, Math.round(duration * diminish));
   enemy.frozen = actual;
@@ -133,6 +134,35 @@ function dealDamage(enemy, rawDamage, elements = ['physical'], canCrit = false,
   }
 
   dmg = Math.round(dmg);
+
+  // ── Special enemy modifiers ───────────────────────────────
+  // Commander aura: -30% incoming damage
+  if (enemy.commanderAuraDR > 0) {
+    dmg = Math.max(1, Math.round(dmg * (1 - enemy.commanderAuraDR)));
+  }
+
+  // Juggernaut damage cap (12 per hit; lightning doubles cap)
+  if (enemy.defId === 'juggernaut') {
+    const baseCap = ENEMY_DEFS.find(d => d.id === 'juggernaut')?.damageCapPerHit ?? 12;
+    const cap = elements.includes('lightning') ? baseCap * 2 : baseCap;
+    dmg = Math.min(dmg, cap);
+  }
+
+  // Void Herald shield: absorbs 60% damage when 3+ weapons hit in same frame
+  if (enemy.defId === 'voidherald') {
+    enemy._voidHitsThisFrame = (enemy._voidHitsThisFrame || 0) + 1;
+    if (enemy._voidHitsThisFrame >= 3) {
+      dmg = Math.max(1, Math.round(dmg * 0.4));
+    }
+  }
+
+  // Echo split: on burst hit >30 raw damage, queue a split (once per echo)
+  if (enemy.defId === 'echo' && !enemy._echoSplit && rawDamage > 30) {
+    enemy._echoSplit = true;
+    G._pendingEchoSpawns = G._pendingEchoSpawns || [];
+    G._pendingEchoSpawns.push({ x: enemy.x, y: enemy.y, copyHp: Math.round(enemy.maxHp * 0.4) });
+  }
+
   enemy.hp -= dmg;
   enemy.hitFlash = 6;
 
@@ -166,6 +196,9 @@ function applyElementalEffect(enemy, el) {
       break;
     case 'void':
       enemy.armor = Math.max(0, (enemy.armor || 0) - 1);
+      if (enemy.defId === 'siegebreaker') {
+        enemy.regenPausedUntil = G.frame + 180; // pause regen 3 seconds
+      }
       break;
     case 'arcane':
       enemy.amplified = Math.min(1.5, (enemy.amplified || 0) + 0.1);
@@ -227,4 +260,16 @@ function tickEnemyStatus(enemy) {
     enemy.amplified *= 0.995;
     if (enemy.amplified < 0.01) enemy.amplified = 0;
   }
+
+  // Siege Breaker HP regen: +5 HP/sec; void damage pauses for 3s
+  if (enemy.defId === 'siegebreaker' && enemy.hp > 0) {
+    if (!enemy.regenPausedUntil || G.frame >= enemy.regenPausedUntil) {
+      enemy._regenAcc = (enemy._regenAcc || 0) + 5 / 60;
+      if (enemy._regenAcc >= 1) {
+        const regen = Math.floor(enemy._regenAcc);
+        enemy.hp = Math.min(enemy.maxHp, enemy.hp + regen);
+        enemy._regenAcc -= regen;
+      }
+    }
+  }
 }