feat(ai-assistant): 浮动按钮支持拖拽到边缘自动收起

- 拖拽按钮到屏幕边缘（≤12px）松开后自动收起为窄条
  - 鼠标悬停窄条时自动展开，离开 1 秒后收起
  - 点击收起状态的窄条直接打开 AI 助手
  - 收起/展开过渡动画平滑，按钮中心位置保持不变
  - 仅在 AI 插件安装后显示浮动按钮

resources/assets/js/components/AIAssistant/float-button.vue

@@ -2,18 +2,28 @@
     <transition name="fade">
         <div
             v-if="visible"
+            class="ai-float-button-wrapper"
+            :class="wrapperClass"
+            :style="wrapperStyle"
+            @mouseenter="onMouseEnter"
+            @mouseleave="onMouseLeave">
+            <div
                 ref="floatBtn"
                 class="ai-float-button"
+                :class="btnClass"
                 :style="btnStyle"
                 @mousedown.stop.prevent="onMouseDown">
-            <svg class="no-dark-content" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg">
+                <!-- 完整图标 -->
+                <svg class="ai-float-button-icon no-dark-content" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg">
                     <path d="M385.80516777 713.87417358c-12.76971517 0-24.13100586-7.79328205-28.82575409-19.62404756l-48.91927648-123.9413531c-18.40341303-46.75969229-55.77360888-84.0359932-102.53330118-102.53330117l-123.94135309-48.91927649c-11.83076552-4.69474822-19.62404757-16.05603892-19.62404757-28.8257541s7.79328205-24.13100586 19.62404757-28.82575407l123.94135309-48.91927649c46.75969229-18.40341303 84.0359932-55.77360888 102.53330118-102.53330119l48.91927648-123.94135308c4.69474822-11.83076552 16.05603892-19.62404757 28.8257541-19.62404757s24.13100586 7.79328205 28.82575408 19.62404757l48.91927648 123.94135308c18.40341303 46.75969229 55.77360888 84.0359932 102.53330118 102.53330119l123.94135309 48.91927649c11.83076552 4.69474822 19.62404757 16.05603892 19.62404757 28.82575407 0 12.76971517-7.79328205 24.13100586-19.62404757 28.8257541l-123.94135309 48.91927649c-46.75969229 18.40341303-84.0359932 55.77360888-102.53330118 102.53330117l-48.91927648 123.9413531c-4.69474822 11.83076552-16.14993388 19.62404757-28.82575408 19.62404756zM177.45224165 390.12433614l50.89107073 20.0935224c62.62794129 24.69437565 112.67395736 74.74039171 137.368333 137.36833299l20.09352239 50.89107073 20.0935224-50.89107073c24.69437565-62.62794129 74.74039171-112.67395736 137.368333-137.36833299l50.89107072-20.0935224-50.89107073-20.09352239c-62.62794129-24.69437565-112.67395736-74.74039171-137.36833299-137.36833301l-20.09352239-50.89107074-20.0935224 50.89107074c-24.69437565 62.62794129-74.74039171 112.67395736-137.368333 137.36833301l-50.89107073 20.09352239zM771.33789183 957.62550131c-12.76971517 0-24.13100586-7.79328205-28.82575409-19.62404758l-26.6661699-67.6043744c-8.63833672-21.87752672-26.10280012-39.34199011-47.98032684-47.98032684l-67.60437441-26.6661699c-11.83076552-4.69474822-19.62404757-16.05603892-19.62404757-28.82575409s7.79328205-24.13100586 19.62404757-28.82575409l67.60437441-26.6661699c21.87752672-8.63833672 39.34199011-26.10280012 47.98032684-47.98032685l26.6661699-67.6043744c4.69474822-11.83076552 16.05603892-19.62404757 28.82575409-19.62404757s24.13100586 7.79328205 28.82575409 19.62404757l26.66616991 67.6043744c8.63833672 21.87752672 26.10280012 39.34199011 47.98032684 47.98032685l67.6043744 26.6661699c11.83076552 4.69474822 19.62404757 16.05603892 19.62404757 28.82575409s-7.79328205 24.13100586-19.62404757 28.82575409l-67.6043744 26.6661699c-21.87752672 8.63833672-39.34199011 26.10280012-47.98032684 47.98032684l-26.66616991 67.6043744c-4.69474822 11.83076552-16.14993388 19.62404757-28.82575409 19.62404758z m-75.58544639-190.70067281c33.61439727 14.83540438 60.75004201 41.87715415 75.49155143 75.49155143 14.83540438-33.61439727 41.87715415-60.75004201 75.49155142-75.49155143-33.61439727-14.83540438-60.75004201-41.87715415-75.49155142-75.49155143-14.74150942 33.61439727-41.87715415 60.75004201-75.49155143 75.49155143z"/>
                 </svg>
             </div>
+        </div>
     </transition>
 </template>
 
 <script>
+import {mapState} from "vuex";
 import emitter from "../../store/events";
 import {withLanguagePreferencePrompt} from "../../utils/ai";
 import {getPageContext} from "./page-context";
@@ -29,47 +39,38 @@ export default {
                 y: 24,          // 垂直距离值
                 fromRight: true,  // true: 距右边, false: 距左边
                 fromBottom: true, // true: 距底部, false: 距顶部
+                collapsed: false, // 是否收起到边缘
             },
             dragging: false,
             positionLoaded: false,
             cacheKey: 'aiAssistant.floatButtonPosition',
             btnSize: 44,
+            collapsedHeight: 48,  // 收起时的高度
+            collapseThreshold: 12, // 触发收起的边缘距离阈值
+            collapseDelay: 1000,   // 收起延迟（毫秒）
+            collapseTimer: null,   // 收起定时器
             record: {},
         };
     },
 
     computed: {
+        ...mapState(['microAppsIds']),
+
+        aiInstalled() {
+            return this.microAppsIds?.includes('ai');
+        },
+
         visible() {
-            return this.userId > 0 &&
+            return this.aiInstalled &&
+                this.userId > 0 &&
                 this.positionLoaded &&
                 !this.windowPortrait &&
                 this.routeName !== 'login' &&
                 !this.$parent?.showModal;
         },
 
-        // 计算实际的 left 值
+        collapsed() {
-        left() {
+            return this.position.collapsed;
-            if (this.position.fromRight) {
-                return this.clientWidth - this.btnSize - this.position.x;
-            }
-            return this.position.x;
-        },
-
-        // 计算实际的 top 值
-        top() {
-            if (this.position.fromBottom) {
-                return this.clientHeight - this.btnSize - this.position.y;
-            }
-            return this.position.y;
-        },
-
-        btnStyle() {
-            return {
-                left: `${this.left}px`,
-                top: `${this.top}px`,
-                width: `${this.btnSize}px`,
-                height: `${this.btnSize}px`,
-            };
         },
 
         clientWidth() {
@@ -79,6 +80,67 @@ export default {
         clientHeight() {
             return this.windowHeight || document.documentElement.clientHeight;
         },
+
+        // wrapper 宽度：包含按钮所有可能位置（边缘到 position.x 的距离）
+        wrapperWidth() {
+            return this.btnSize + this.position.x;
+        },
+
+        // wrapper 左边位置
+        wrapperLeft() {
+            if (this.position.fromRight) {
+                // 右侧：从 (屏幕宽 - wrapper宽度) 开始
+                return this.clientWidth - this.wrapperWidth;
+            }
+            // 左侧：从 0 开始
+            return 0;
+        },
+
+        wrapperTop() {
+            // 基于按钮中心计算，确保收起/展开时中心位置不变
+            const centerY = this.position.fromBottom
+                ? this.clientHeight - this.btnSize / 2 - this.position.y
+                : this.position.y + this.btnSize / 2;
+            return centerY - this.wrapperHeight / 2;
+        },
+
+        wrapperClass() {
+            return {
+                'is-left': !this.position.fromRight,
+                'is-right': this.position.fromRight,
+                'is-dragging': this.dragging,
+                'is-collapsed': this.collapsed,
+            };
+        },
+
+        wrapperHeight() {
+            return this.collapsed ? this.collapsedHeight : this.btnSize;
+        },
+
+        wrapperStyle() {
+            return {
+                left: `${this.wrapperLeft}px`,
+                top: `${this.wrapperTop}px`,
+                width: `${this.wrapperWidth}px`,
+                height: `${this.wrapperHeight}px`,
+            };
+        },
+
+        btnClass() {
+            return {
+                'is-collapsed': this.collapsed,
+            };
+        },
+
+        btnStyle() {
+            // 收起时按钮在边缘（不偏移），展开时向内偏移 position.x
+            if (this.collapsed) {
+                return { transform: 'translateX(0)' };
+            }
+            // 右侧向左偏移（负值），左侧向右偏移（正值）
+            const offset = this.position.fromRight ? -this.position.x : this.position.x;
+            return { transform: `translateX(${offset}px)` };
+        },
     },
 
     mounted() {
@@ -91,6 +153,7 @@ export default {
         document.removeEventListener('mousemove', this.onMouseMove);
         document.removeEventListener('mouseup', this.onMouseUp);
         document.removeEventListener('contextmenu', this.onContextMenu);
+        this.clearCollapseTimer();
     },
 
     methods: {
@@ -103,7 +166,8 @@ export default {
                 if (saved) {
                     const pos = JSON.parse(saved);
                     if (pos && typeof pos.x === 'number' && typeof pos.y === 'number') {
-                        this.position = pos;
+                        // 兼容旧格式，确保有 collapsed 字段
+                        this.position = {...pos, collapsed: pos.collapsed ?? false};
                         this.$nextTick(() => {
                             this.checkBounds();
                             this.positionLoaded = true;
@@ -115,7 +179,7 @@ export default {
                 // ignore
             }
             // 默认位置：右下角
-            this.position = {x: 24, y: 24, fromRight: true, fromBottom: true};
+            this.position = {x: 24, y: 24, fromRight: true, fromBottom: true, collapsed: false};
             this.positionLoaded = true;
         },
 
@@ -141,7 +205,7 @@ export default {
             const x = fromRight ? (this.clientWidth - this.btnSize - left) : left;
             const y = fromBottom ? (this.clientHeight - this.btnSize - top) : top;
 
-            this.position = {x, y, fromRight, fromBottom};
+            this.position = {x, y, fromRight, fromBottom, collapsed: this.position.collapsed};
         },
 
         /**
@@ -151,12 +215,20 @@ export default {
             // 只响应鼠标左键
             if (e.button !== 0) return;
 
+            // 收起状态下点击直接打开 AI 助手
+            if (this.collapsed) {
+                this.onClick();
+                return;
+            }
+
+            // 按钮的实际视觉位置
+            const btnRect = this.$refs.floatBtn.getBoundingClientRect();
             this.record = {
                 time: Date.now(),
-                startLeft: this.left,
+                startLeft: btnRect.left,
-                startTop: this.top,
+                startTop: btnRect.top,
-                offsetX: e.clientX - this.left,
+                offsetX: e.clientX - btnRect.left,
-                offsetY: e.clientY - this.top,
+                offsetY: e.clientY - btnRect.top,
             };
             this.dragging = true;
 
@@ -199,7 +271,8 @@ export default {
             document.removeEventListener('mouseup', this.onMouseUp);
             document.removeEventListener('contextmenu', this.onContextMenu);
 
-            const moveDistance = Math.abs(this.left - this.record.startLeft) + Math.abs(this.top - this.record.startTop);
+            const btnRect = this.$refs.floatBtn.getBoundingClientRect();
+            const moveDistance = Math.abs(btnRect.left - this.record.startLeft) + Math.abs(btnRect.top - this.record.startTop);
             const duration = Date.now() - this.record.time;
 
             this.savePosition();
@@ -209,6 +282,55 @@ export default {
             if (moveDistance < 5 && duration < 200) {
                 this.onClick();
             }
+
+            // 检测是否靠近左右边缘，延迟收起
+            this.scheduleCollapse();
+        },
+
+        /**
+         * 鼠标进入
+         */
+        onMouseEnter() {
+            this.clearCollapseTimer();
+            // 如果是收起状态，展开
+            if (this.collapsed) {
+                this.position.collapsed = false;
+                this.savePosition();
+            }
+        },
+
+        /**
+         * 鼠标离开
+         */
+        onMouseLeave() {
+            // 拖拽期间不处理
+            if (this.dragging) return;
+            // 延迟检测是否需要收起
+            this.scheduleCollapse();
+        },
+
+        /**
+         * 计划收起（延迟执行）
+         */
+        scheduleCollapse() {
+            this.clearCollapseTimer();
+            // 检测是否靠近边缘
+            if (this.position.x <= this.collapseThreshold) {
+                this.collapseTimer = setTimeout(() => {
+                    this.position.collapsed = true;
+                    this.savePosition();
+                }, this.collapseDelay);
+            }
+        },
+
+        /**
+         * 清除收起定时器
+         */
+        clearCollapseTimer() {
+            if (this.collapseTimer) {
+                clearTimeout(this.collapseTimer);
+                this.collapseTimer = null;
+            }
         },
 
         /**
@@ -270,9 +392,36 @@ export default {
 </script>
 
 <style lang="scss">
-.ai-float-button {
+$btn-size: 44px;
+$collapsed-width: 12px;
+$collapsed-height: 48px;
+
+.ai-float-button-wrapper {
     position: fixed;
     z-index: 1000;
+    display: flex;
+    align-items: center;
+
+    // 右侧：按钮默认在右边（屏幕边缘），展开时通过 transform 向左移动
+    &.is-right {
+        justify-content: flex-end;
+    }
+
+    // 左侧：按钮默认在左边（屏幕边缘），展开时通过 transform 向右移动
+    &.is-left {
+        justify-content: flex-start;
+    }
+
+    &.is-dragging {
+        .ai-float-button {
+            transition: none !important;
+        }
+    }
+}
+
+.ai-float-button {
+    width: $btn-size;
+    height: $btn-size;
     border-radius: 50%;
     background: #8bcf70;
     box-shadow: 0 4px 12px lch(77 53.3 131.54 / 0.4);
@@ -280,24 +429,40 @@ export default {
     display: flex;
     align-items: center;
     justify-content: center;
-    transition: transform 0.2s, box-shadow 0.2s;
+    transition: transform 0.25s ease-out, box-shadow 0.2s, width 0.25s ease-out, height 0.25s ease-out, border-radius 0.25s ease-out;
     user-select: none;
+    flex-shrink: 0;
 
-    &:hover {
+    &:not(.is-collapsed):hover {
-        transform: scale(1.08);
         box-shadow: 0 6px 16px lch(77 53.3 131.54 / 0.5);
     }
 
-    &:active {
+    .ai-float-button-icon {
-        transform: scale(0.95);
-    }
-
-    svg {
         width: 24px;
         height: 24px;
         fill: #fff;
     }
+
+    // 收起状态
+    &.is-collapsed {
+        width: $collapsed-width;
+        height: $collapsed-height;
+        box-shadow: 0 2px 8px lch(77 53.3 131.54 / 0.3);
+
+        .ai-float-button-icon {
+            display: none;
+        }
+    }
+
+    .is-left &.is-collapsed {
+        border-radius: 0 6px 6px 0;
+    }
+
+    .is-right &.is-collapsed {
+        border-radius: 6px 0 0 6px;
+    }
 }
+
 body.dark-mode-reverse {
     .ai-float-button {
         box-shadow: none;