优化：百家乐骰子悬浮按钮支持拖拽移动，位置记忆 localStorage

resources/views/chat/partials/baccarat-panel.blade.php

@@ -295,24 +295,131 @@
     </div>
 </div>
 
-{{-- ─── 骰子悬浮入口（游戏开启时常驻） ─── --}}
+{{-- ─── 骰子悬浮入口（游戏开启时常驻，支持拖拽） ─── --}}
 <div id="baccarat-fab" x-data="{ visible: false }" x-show="visible" x-cloak
-    style="position:fixed; bottom:90px; right:18px; z-index:9900;">
-    <button
-        x-on:click="() => {
+    style="position:fixed; bottom:90px; right:18px; z-index:9900; touch-action:none;">
+    <button id="baccarat-fab-btn" x-on:click.stop="() => {}"
+        style="width:52px; height:52px; border-radius:50%; border:none; cursor:grab;
+               background:linear-gradient(135deg,#7c3aed,#4f46e5);
+               box-shadow:0 4px 20px rgba(124,58,237,.5);
+               font-size:22px; display:flex; align-items:center; justify-content:center;
+               animation:pulse-fab 2s infinite; user-select:none;"
+        title="百家乐下注中（可拖动）">🎲</button>
+</div>
+
+<script>
+    /**
+     * 百家乐骰子悬浮按钮拖拽逻辑
+     * 需在 DOM 就绪后初始化，因为 x-cloak 元素初始隐藏
+     */
+    (function initBaccaratFabDrag() {
+        const LS_KEY = 'baccaratFabPos';
+
+        function attachDrag() {
+            const fab = document.getElementById('baccarat-fab');
+            const btn = document.getElementById('baccarat-fab-btn');
+            if (!fab || !btn || fab._dragInited) return;
+            fab._dragInited = true;
+
+            // 恢复上次拖拽位置
+            const saved = (() => {
+                try {
+                    return JSON.parse(localStorage.getItem(LS_KEY));
+                } catch {
+                    return null;
+                }
+            })();
+            if (saved) {
+                fab.style.left = saved.left + 'px';
+                fab.style.top = saved.top + 'px';
+                fab.style.right = 'auto';
+                fab.style.bottom = 'auto';
+            }
+
+            let isDragging = false;
+            let startX, startY, startLeft, startTop;
+
+            function onStart(e) {
+                const rect = fab.getBoundingClientRect();
+                // 转为绝对 left/top
+                fab.style.left = rect.left + 'px';
+                fab.style.top = rect.top + 'px';
+                fab.style.right = 'auto';
+                fab.style.bottom = 'auto';
+
+                isDragging = false;
+                const cx = e.touches ? e.touches[0].clientX : e.clientX;
+                const cy = e.touches ? e.touches[0].clientY : e.clientY;
+                startX = cx;
+                startY = cy;
+                startLeft = rect.left;
+                startTop = rect.top;
+                btn.style.cursor = 'grabbing';
+
+                document.addEventListener('mousemove', onMove, {
+                    passive: false
+                });
+                document.addEventListener('mouseup', onEnd);
+                document.addEventListener('touchmove', onMove, {
+                    passive: false
+                });
+                document.addEventListener('touchend', onEnd);
+            }
+
+            function onMove(e) {
+                e.preventDefault();
+                const cx = e.touches ? e.touches[0].clientX : e.clientX;
+                const cy = e.touches ? e.touches[0].clientY : e.clientY;
+                const dx = cx - startX,
+                    dy = cy - startY;
+                if (Math.abs(dx) > 3 || Math.abs(dy) > 3) isDragging = true;
+                if (!isDragging) return;
+
+                const newLeft = Math.max(0, Math.min(window.innerWidth - fab.offsetWidth, startLeft + dx));
+                const newTop = Math.max(0, Math.min(window.innerHeight - fab.offsetHeight, startTop + dy));
+                fab.style.left = newLeft + 'px';
+                fab.style.top = newTop + 'px';
+            }
+
+            function onEnd() {
+                btn.style.cursor = 'grab';
+                document.removeEventListener('mousemove', onMove);
+                document.removeEventListener('mouseup', onEnd);
+                document.removeEventListener('touchmove', onMove);
+                document.removeEventListener('touchend', onEnd);
+
+                if (isDragging) {
+                    localStorage.setItem(LS_KEY, JSON.stringify({
+                        left: parseInt(fab.style.left),
+                        top: parseInt(fab.style.top),
+                    }));
+                }
+            }
+
+            btn.addEventListener('mousedown', onStart);
+            btn.addEventListener('touchstart', onStart, {
+                passive: true
+            });
+
+            // 非拖拽时才打开面板
+            btn.addEventListener('click', () => {
+                if (isDragging) return;
                 const p = Alpine.$data(document.getElementById('baccarat-panel'));
+                if (!p) return;
                 p.show = true;
                 if (p.phase === 'betting' && p.countdown > 0 && !p.countdownTimer) {
                     p.startCountdown();
                 }
-            }"
-        style="width:52px; height:52px; border-radius:50%; border:none; cursor:pointer;
-               background:linear-gradient(135deg,#7c3aed,#4f46e5);
-               box-shadow:0 4px 20px rgba(124,58,237,.5);
-               font-size:22px; display:flex; align-items:center; justify-content:center;
-               animation:pulse-fab 2s infinite;"
-        title="百家乐下注中">🎲</button>
-</div>
+            });
+        }
+
+        // 首次尝试（元素可能已在 DOM 中）
+        document.addEventListener('DOMContentLoaded', attachDrag);
+
+        // Alpine 使 x-cloak 元素出现后再次尝试
+        document.addEventListener('alpine:initialized', () => setTimeout(attachDrag, 100));
+    })();
+</script>
 
 <style>
     @keyframes spin {