feat: animate cards from dealt position to hand-setting panel

Add a smooth tween animation when opening the hand-setting panel,
transitioning the 7 dealt cards from their seat positions to the
panel's source area instead of snapping them into place. This
improves the visual flow between the dealing and setting phases.

public/src/games/paigow/PaiGowPokerGame.js

@@ -426,14 +426,39 @@ export default class PaiGowPokerGame extends Phaser.Scene {
 
   showHandSetPanel() {
     this.panelVisible = true;
+    this.animating = true;
     for (const o of this.setPanelGroup) o.setVisible(true);
-    // Hide all portraits and their seat labels so they don't overlap the panel
     for (const p of this.portraits) p?.hide?.();
     for (const t of Object.values(this.nameTxts)) t.setVisible(false);
     for (const t of Object.values(this.chipTxts)) t.setVisible(false);
-    // Build and place the 7 card containers in the source area
+
-    this.buildSetCardContainers();
+    // Grab the face-up seat cards that were just dealt
-    this.updateHandSetUI();
+    const seatCards = [...(this.seatCardGraphics[0] ?? [])];
+
+    const onAllArrived = () => {
+      // Swap animated seat cards for interactive panel cards
+      for (const c of seatCards) c.destroy();
+      this.seatCardGraphics[0] = [];
+      this.buildSetCardContainers();
+      this.updateHandSetUI();
+      this.animating = false;
+    };
+
+    if (!seatCards.length) { onAllArrived(); return; }
+
+    let done = 0;
+    seatCards.forEach((cont, i) => {
+      cont.setDepth(D.panel + 10);
+      this.tweens.add({
+        targets: cont,
+        x: this.sourceCardX(i),
+        y: SOURCE_Y,
+        duration: 380,
+        delay: i * 65,
+        ease: 'Back.easeOut',
+        onComplete: () => { if (++done === seatCards.length) onAllArrived(); },
+      });
+    });
   }
 
   hideHandSetPanel() {