feat: implement auto-pass and draw handling for SkipBo

- Add `isPlayerStuck` and `applyAutoPass` logic to SkipBoLogic.
- Handle stuck players by automatically passing their turn.
- Detect draw conditions when all players are stuck consecutively.
- Update UI to display appropriate messages for auto-passes and draws.
- Pass subtitle text to `showGameOverPanel` for clearer win/loss/draw context.

public/src/games/skipbo/SkipBoGame.js

@@ -9,6 +9,7 @@ import {
   DISCARD_PILE_COUNT,
   HAND_SIZE,
   STOCK_SIZE,
+  applyAutoPass,
   applyDiscard,
   applyPlay,
   buildPileTopValue,
@@ -16,6 +17,7 @@ import {
   createInitialState,
   discardTop,
   getValidPlays,
+  isPlayerStuck,
   nextRequired,
   stockTop,
 } from './SkipBoLogic.js';
@@ -666,10 +668,8 @@ export default class SkipBoGame extends Phaser.Scene {
       this.gs = next;
       this.renderAll();
       this.animating = false;
-      if (this.gs.phase === 'gameover') {
-        this.endGame();
-        return;
-      }
+      if (this.gs.phase === 'gameover') { this.endGame(); return; }
+      if (this.checkForStuck()) return;
       // After a successful play it's still the same player's turn until they
       // discard. If AI's turn, continue.
       if (this.gs.currentPlayer !== 0) {
@@ -688,6 +688,7 @@ export default class SkipBoGame extends Phaser.Scene {
       this.renderAll();
       this.animating = false;
       if (this.gs.phase === 'gameover') { this.endGame(); return; }
+      if (this.checkForStuck()) return;
       if (this.gs.currentPlayer !== 0) {
         this.runAITurn();
       } else {
@@ -775,6 +776,7 @@ export default class SkipBoGame extends Phaser.Scene {
         this.renderAll();
         this.animating = false;
         if (this.gs.phase === 'gameover') { this.endGame(); return; }
+        if (this.checkForStuck()) return;
         this.time.delayedCall(420, () => this.stepAI());
       });
     } else {
@@ -785,6 +787,7 @@ export default class SkipBoGame extends Phaser.Scene {
         this.renderAll();
         this.animating = false;
         if (this.gs.phase === 'gameover') { this.endGame(); return; }
+        if (this.checkForStuck()) return;
         if (this.gs.currentPlayer === 0) {
           this.setStatus('Your turn');
         } else {
@@ -794,11 +797,48 @@ export default class SkipBoGame extends Phaser.Scene {
     }
   }
 
+  // ── Stuck / auto-pass ───────────────────────────────────────────────────
+
+  checkForStuck() {
+    if (!isPlayerStuck(this.gs)) return false;
+    const seat = this.gs.currentPlayer;
+    const name = seat === 0
+      ? (auth.user?.username ?? 'You')
+      : (this.opponents[seat - 1]?.name ?? `Player ${seat + 1}`);
+    const subject = seat === 0 ? 'You have' : `${name} has`;
+    this.setStatus(`${subject} no moves — passing turn.`);
+    this.animating = true;
+    this.time.delayedCall(1400, () => {
+      this.gs = applyAutoPass(this.gs);
+      this.renderAll();
+      this.animating = false;
+      if (this.gs.phase === 'gameover') { this.endGame(); return; }
+      if (this.checkForStuck()) return;
+      if (this.gs.currentPlayer !== 0) {
+        this.runAITurn();
+      } else {
+        this.setStatus('Your turn');
+      }
+    });
+    return true;
+  }
+
   // ── Endgame ─────────────────────────────────────────────────────────────
 
   endGame() {
     this.gameOver = true;
     const winnerSeat = this.gs.winner;
+
+    if (winnerSeat === -1) {
+      this.setStatus("It's a draw!");
+      for (let s = 1; s < this.gs.players.length; s++) {
+        this.opponentPortraits[s]?.playEmotion?.('loss');
+      }
+      this.recordHistory(false);
+      this.showGameOverPanel("It's a draw!", false, null, 'No player could make a move.');
+      return;
+    }
+
     const youWon = winnerSeat === 0;
     const name = winnerSeat === 0
       ? (auth.user?.username ?? 'You')
@@ -815,10 +855,12 @@ export default class SkipBoGame extends Phaser.Scene {
     }
 
     this.recordHistory(youWon);
-    this.showGameOverPanel(msg, youWon, name);
+    this.showGameOverPanel(msg, youWon, name, youWon
+      ? 'You emptied your stock first.'
+      : `${name} emptied their stock first.`);
   }
 
-  showGameOverPanel(msg, youWon, name) {
+  showGameOverPanel(msg, youWon, name, subtitle) {
     const overlay = this.add.rectangle(CX, CY, GAME_WIDTH, GAME_HEIGHT, 0x000000, 0.65)
       .setInteractive().setDepth(D.modal);
     const panelW = 720;
@@ -829,9 +871,7 @@ export default class SkipBoGame extends Phaser.Scene {
       fontFamily: 'Righteous', fontSize: '42px',
       color: youWon ? COLORS.goldHex : COLORS.textHex,
     }).setOrigin(0.5).setDepth(D.modal);
-    this.add.text(CX, CY - 10, youWon
-      ? 'You emptied your stock first.'
-      : `${name} emptied their stock first.`, {
+    this.add.text(CX, CY - 10, subtitle, {
       fontFamily: '"Julius Sans One"', fontSize: '22px', color: COLORS.mutedHex,
     }).setOrigin(0.5).setDepth(D.modal);
 

public/src/games/skipbo/SkipBoLogic.js

@@ -85,9 +85,10 @@ export function createInitialState({ playerCount, seed, startingPlayer = 0 } = {
     completedPile: [],
     currentPlayer: startingPlayer,
     phase: 'play',         // 'play' | 'gameover'
-    winner: null,
+    winner: null,          // seat index, or -1 for draw
     seed: seed ?? null,
     turnCount: 0,
+    consecutiveStuckTurns: 0,
   };
 
   // Top of every stock starts face-up. We model "face-up" implicitly: stock
@@ -140,6 +141,7 @@ export function cloneState(state) {
     winner: state.winner,
     seed: state.seed,
     turnCount: state.turnCount,
+    consecutiveStuckTurns: state.consecutiveStuckTurns,
   };
 }
 
@@ -304,11 +306,48 @@ export function applyDiscard(state, handIdx, discardIdx) {
   // Advance turn
   next.currentPlayer = (seat + 1) % next.players.length;
   next.turnCount += 1;
+  next.consecutiveStuckTurns = 0; // normal discard resets the stuck counter
   refillHand(next, next.currentPlayer);
 
   return next;
 }
 
+/**
+ * Returns true if the current player is completely stuck:
+ * their hand is empty, the draw pile is exhausted (including completed pile),
+ * and they have no valid plays from stock or discard tops.
+ */
+export function isPlayerStuck(state) {
+  if (state.phase !== 'play') return false;
+  const seat = state.currentPlayer;
+  const player = state.players[seat];
+  const canDraw = state.drawPile.length > 0 || state.completedPile.length > 0;
+  if (player.hand.length > 0 || canDraw) return false;
+  return !hasAnyPlay(state);
+}
+
+/**
+ * Auto-passes the current player's turn when they are stuck.
+ * Increments consecutiveStuckTurns; if every player is stuck in a row
+ * the game ends as a draw (winner === -1).
+ */
+export function applyAutoPass(state) {
+  if (state.phase !== 'play') return state;
+  const next = cloneState(state);
+  next.consecutiveStuckTurns += 1;
+
+  if (next.consecutiveStuckTurns >= next.players.length) {
+    next.phase = 'gameover';
+    next.winner = -1; // draw
+    return next;
+  }
+
+  next.currentPlayer = (next.currentPlayer + 1) % next.players.length;
+  next.turnCount += 1;
+  refillHand(next, next.currentPlayer);
+  return next;
+}
+
 // Convenience for UI — count cards in each pile per seat for the always-on
 // HUD. The top stock card is always visible separately.
 export function snapshotCounts(state) {