feat(ai-assistant): 添加全局浮动按钮入口

- 新增 float-button.vue 组件，支持拖拽定位和位置持久化
  - 将 AIAssistant.vue 重构为目录结构（index.vue + float-button.vue）
  - 浮动按钮位置基于四角存储，窗口缩放时保持相对位置
  - 点击浮动按钮打开 AI 助手对话框

resources/assets/js/App.vue

@@ -102,7 +102,7 @@ import DropdownMenu from "./components/DropdownMenu";
 import {ctrlPressed} from "./mixins/ctrlPressed";
 import {mapState} from "vuex";
 import emitter from "./store/events";
-import AIAssistant from "./components/AIAssistant.vue";
+import AIAssistant from "./components/AIAssistant";
 import UserDetail from "./pages/manage/components/UserDetail.vue";
 import {languageName} from "./language";
 

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

@@ -0,0 +1,254 @@
+<template>
+    <div
+        v-show="visible"
+        ref="floatBtn"
+        class="ai-float-button"
+        :style="btnStyle"
+        @mousedown.stop.prevent="onMouseDown">
+        <svg 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>
+</template>
+
+<script>
+import emitter from "../../store/events";
+
+export default {
+    name: 'AIAssistantFloatButton',
+
+    data() {
+        return {
+            // 位置存储：只保存两个距离（水平一个、垂直一个）
+            position: {
+                x: 24,          // 水平距离值
+                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
+            },
+            dragging: false,
+            positionLoaded: false,
+            cacheKey: 'aiAssistant.floatButtonPosition',
+            btnSize: 44,
+            record: {},
+        };
+    },
+
+    computed: {
+        visible() {
+            return this.userId > 0 && this.positionLoaded && !this.windowPortrait;
+        },
+
+        // 计算实际的 left 值
+        left() {
+            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() {
+            return this.windowWidth || document.documentElement.clientWidth;
+        },
+
+        clientHeight() {
+            return this.windowHeight || document.documentElement.clientHeight;
+        },
+    },
+
+    mounted() {
+        this.loadPosition();
+        window.addEventListener('resize', this.onResize);
+    },
+
+    beforeDestroy() {
+        window.removeEventListener('resize', this.onResize);
+        document.removeEventListener('mousemove', this.onMouseMove);
+        document.removeEventListener('mouseup', this.onMouseUp);
+    },
+
+    methods: {
+        /**
+         * 加载保存的位置
+         */
+        async loadPosition() {
+            try {
+                const saved = await $A.IDBString(this.cacheKey);
+                if (saved) {
+                    const pos = JSON.parse(saved);
+                    if (pos && typeof pos.x === 'number' && typeof pos.y === 'number') {
+                        this.position = pos;
+                        this.$nextTick(() => {
+                            this.checkBounds();
+                            this.positionLoaded = true;
+                        });
+                        return;
+                    }
+                }
+            } catch (e) {
+                // ignore
+            }
+            // 默认位置：右下角
+            this.position = {x: 24, y: 24, fromRight: true, fromBottom: true};
+            this.positionLoaded = true;
+        },
+
+        /**
+         * 保存位置
+         */
+        savePosition() {
+            $A.IDBSave(this.cacheKey, JSON.stringify(this.position));
+        },
+
+        /**
+         * 根据当前 left/top 更新 position 对象
+         */
+        updatePositionFromCoords(left, top) {
+            const centerX = left + this.btnSize / 2;
+            const centerY = top + this.btnSize / 2;
+
+            // 判断在哪个半区
+            const fromRight = centerX >= this.clientWidth / 2;
+            const fromBottom = centerY >= this.clientHeight / 2;
+
+            // 计算距离
+            const x = fromRight ? (this.clientWidth - this.btnSize - left) : left;
+            const y = fromBottom ? (this.clientHeight - this.btnSize - top) : top;
+
+            this.position = {x, y, fromRight, fromBottom};
+        },
+
+        /**
+         * 鼠标按下
+         */
+        onMouseDown(e) {
+            this.record = {
+                time: Date.now(),
+                startLeft: this.left,
+                startTop: this.top,
+                offsetX: e.clientX - this.left,
+                offsetY: e.clientY - this.top,
+            };
+            this.dragging = true;
+
+            document.addEventListener('mousemove', this.onMouseMove);
+            document.addEventListener('mouseup', this.onMouseUp);
+        },
+
+        /**
+         * 鼠标移动
+         */
+        onMouseMove(e) {
+            if (!this.dragging) return;
+
+            const minMargin = 12;
+            let newLeft = e.clientX - this.record.offsetX;
+            let newTop = e.clientY - this.record.offsetY;
+
+            // 边界限制（最小边距12px）
+            newLeft = Math.max(minMargin, Math.min(newLeft, this.clientWidth - this.btnSize - minMargin));
+            newTop = Math.max(minMargin, Math.min(newTop, this.clientHeight - this.btnSize - minMargin));
+
+            this.updatePositionFromCoords(newLeft, newTop);
+        },
+
+        /**
+         * 鼠标松开
+         */
+        onMouseUp() {
+            document.removeEventListener('mousemove', this.onMouseMove);
+            document.removeEventListener('mouseup', this.onMouseUp);
+
+            const moveDistance = Math.abs(this.left - this.record.startLeft) + Math.abs(this.top - this.record.startTop);
+            const duration = Date.now() - this.record.time;
+
+            this.savePosition();
+            this.dragging = false;
+
+            // 判断是否为点击（移动距离小于5px 或 按下时间小于200ms）
+            if (moveDistance < 5 || duration < 200) {
+                this.onClick();
+            }
+        },
+
+        /**
+         * 检查边界（仅在加载和窗口变化时调用）
+         */
+        checkBounds() {
+            const minMargin = 12;
+            // 确保距离在有效范围内（最小12px，最大不超出屏幕）
+            const maxX = this.clientWidth - this.btnSize - minMargin;
+            const maxY = this.clientHeight - this.btnSize - minMargin;
+            this.position.x = Math.max(minMargin, Math.min(this.position.x, maxX));
+            this.position.y = Math.max(minMargin, Math.min(this.position.y, maxY));
+        },
+
+        /**
+         * 窗口大小改变
+         */
+        onResize() {
+            this.$nextTick(() => {
+                this.checkBounds();
+            });
+        },
+
+        /**
+         * 点击按钮
+         */
+        onClick() {
+            emitter.emit('openAIAssistant', {
+                sessionKey: 'global',
+                resumeSession: 300,
+            });
+        },
+    },
+};
+</script>
+
+<style lang="scss" scoped>
+.ai-float-button {
+    position: fixed;
+    z-index: 1000;
+    border-radius: 50%;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: transform 0.2s, box-shadow 0.2s;
+    user-select: none;
+
+    &:hover {
+        transform: scale(1.08);
+        box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
+    }
+
+    &:active {
+        transform: scale(0.95);
+    }
+
+    svg {
+        width: 24px;
+        height: 24px;
+        fill: #fff;
+    }
+}
+</style>

resources/assets/js/components/AIAssistant/index.vue

@@ -135,14 +135,17 @@
 </template>
 
 <script>
-import emitter from "../store/events";
+import Vue from "vue";
-import {SSEClient} from "../utils";
+import emitter from "../../store/events";
-import {AIBotMap, AIModelNames} from "../utils/ai";
+import {SSEClient} from "../../utils";
-import DialogMarkdown from "../pages/manage/components/DialogMarkdown.vue";
+import {AIBotMap, AIModelNames} from "../../utils/ai";
+import DialogMarkdown from "../../pages/manage/components/DialogMarkdown.vue";
+import FloatButton from "./float-button.vue";
 
 export default {
     name: 'AIAssistant',
     components: {DialogMarkdown},
+    floatButtonInstance: null,
     data() {
         return {
             // 弹窗状态
@@ -201,11 +204,13 @@ export default {
         emitter.on('openAIAssistant', this.onOpenAIAssistant);
         this.loadCachedModel();
         this.loadSessionStore();
+        this.mountFloatButton();
     },
     beforeDestroy() {
         emitter.off('openAIAssistant', this.onOpenAIAssistant);
         this.clearActiveSSEClients();
         this.clearAutoSubmitTimer();
+        this.unmountFloatButton();
     },
     computed: {
         selectedModelOption({modelMap, inputModel}) {
@@ -227,6 +232,31 @@ export default {
         },
     },
     methods: {
+        /**
+         * 挂载浮动按钮到 body
+         */
+        mountFloatButton() {
+            const FloatButtonCtor = Vue.extend(FloatButton);
+            this.$options.floatButtonInstance = new FloatButtonCtor({
+                parent: this,
+            });
+            this.$options.floatButtonInstance.$mount();
+            document.body.appendChild(this.$options.floatButtonInstance.$el);
+        },
+
+        /**
+         * 卸载浮动按钮
+         */
+        unmountFloatButton() {
+            if (this.$options.floatButtonInstance) {
+                this.$options.floatButtonInstance.$destroy();
+                if (this.$options.floatButtonInstance.$el && this.$options.floatButtonInstance.$el.parentNode) {
+                    this.$options.floatButtonInstance.$el.parentNode.removeChild(this.$options.floatButtonInstance.$el);
+                }
+                this.$options.floatButtonInstance = null;
+            }
+        },
+
         /**
          * 打开助手弹窗并应用参数
          */