feat(phase10): add character voiceovers and enforce staging rules

- Add speech assets and configuration for Brad and Mario
- Update opponents.json with new speech arrays for intro, happy, and upset states
- Prevent discarding cards while cards are staged in Phase 10
- Add visual feedback (_shakeStagingButtons) when staging rules are violated
- Add _hasStagedCards helper to check staging group state
- Move staged cards back to hand if user attempts to discard during staging

public/data/opponents.json

@@ -30,7 +30,27 @@
       "id": "brad",
       "spriteIndex": 1,
       "name": "Brad",
-      "bio": "Came for the honey, stayed for the salmon!"
+      "bio": "Came for the honey, stayed for the salmon!",
+      "speech": {
+        "intro": [
+          "brad-intro-01",
+          "brad-intro-02"
+        ],
+        "happy": [
+          "brad-happy-01",
+          "brad-happy-02",
+          "brad-happy-03",
+          "brad-happy-04",
+          "brad-happy-05"
+        ],
+        "upset": [
+          "brad-upset-01",
+          "brad-upset-02",
+          "brad-upset-03",
+          "brad-upset-04",
+          "brad-upset-05"
+        ]
+      }
     },
     {
       "id": "victor",
@@ -88,7 +108,20 @@
       "id": "mario",
       "spriteIndex": 4,
       "name": "Mario",
-      "bio": "Can you find your way out of my maze of puzzles, games and fun!"
+      "bio": "Can you find your way out of my maze of puzzles, games and fun!",
+      "speech": {
+        "intro": [
+          "mario-intro-01"
+        ],
+        "happy": [
+          "mario-happy-01",
+          "mario-happy-02"
+        ],
+        "upset": [
+          "mario-upset-01",
+          "mario-upset-02"
+        ]
+      }
     },
     {
       "id": "ethel",

public/src/games/phase10/Phase10Game.js

@@ -599,6 +599,15 @@ export default class Phase10Game extends Phaser.Scene {
 
     // ── Discard path ──────────────────────────────────────────────────────
     if (dropTarget?.type === 'discard') {
+      if (this._hasStagedCards()) {
+        this.tweens.killTweensOf(card);
+        this._settleNonDraggedCards();
+        this.dragState = null;
+        this.tweens.add({ targets: card, x: 460 + ds.cardIdx * HAND_SPREAD, y: 990, rotation: 0, scaleX: 1, scaleY: 1, duration: 200, ease: 'Back.easeOut' });
+        this.setStatus('Submit or clear your phase first — you have cards staged.');
+        this._shakeStagingButtons();
+        return;
+      }
       const handIdx = ds.cardIdx;
       const handCard = this.gs.players[0].hand[handIdx];
       this.tweens.killTweensOf(card);
@@ -1305,6 +1314,11 @@ export default class Phase10Game extends Phaser.Scene {
     if (!this.isLocalTurn() || this.animating) return;
     // If we have a card selected and we've already drawn, discarding ends turn.
     if (this.gs.drawnThisTurn && this.selectedHandIdx != null) {
+      if (this._hasStagedCards()) {
+        this.setStatus('Submit or clear your phase first — you have cards staged.');
+        this._shakeStagingButtons();
+        return;
+      }
       const handIdx = this.selectedHandIdx;
       this.selectedHandIdx = null;
       this.clearHighlights();
@@ -1737,6 +1751,27 @@ export default class Phase10Game extends Phaser.Scene {
 
   // ── HUD helpers ─────────────────────────────────────────────────────────
 
+  _hasStagedCards() {
+    return this.stagingGroups?.some((g) => g.slots.some((s) => s !== null)) ?? false;
+  }
+
+  _shakeStagingButtons() {
+    const targets = [this.submitBtn, this.clearBtn].filter(Boolean);
+    if (!targets.length) return;
+    for (const btn of targets) {
+      const ox = btn.x;
+      this.tweens.add({
+        targets: btn,
+        x: { from: ox - 8, to: ox + 8 },
+        duration: 60,
+        ease: 'Sine.easeInOut',
+        yoyo: true,
+        repeat: 3,
+        onComplete: () => { btn.x = ox; },
+      });
+    }
+  }
+
   setStatus(s) {
     if (!this.statusText) return;
     this.statusText.setText(s);