feat: 添加动漫色情检测(WD Tagger v3)，媒体库展示优化

- 新增 anime_nsfw 模块：WD Tagger v3 模型检测动漫/二次元图片

- 修复误判：当 general 评分最高时判定为安全，避免非动漫图误判

- 数据库存储四个 rating 原始分数(JSON)，无需重扫即可查看

- 媒体库新增动漫色情检测列、文件路径列(支持一键复制)

- 修复预览图加载占位符显示两个点的问题

- 移动文件按钮不再限制扫描完成后才显示

frontend/src/views/MediaList.vue

@@ -1,7 +1,10 @@
 <template>
     <div class="page-card">
         <div class="toolbar">
-            <span class="title">媒体库</span>
+            <div class="toolbar-left">
+                <span class="title">媒体库</span>
+                <span v-if="manualNsfwAvg > 0" class="nsfw-avg">手动标记 NSFW 均值：{{ (manualNsfwAvg * 100).toFixed(2) }}%</span>
+            </div>
             <el-button type="primary" size="small" icon="el-icon-refresh" @click="loadList">刷新</el-button>
         </div>
 
@@ -37,12 +40,15 @@
         <el-table :data="list" v-loading="loading" border stripe @sort-change="handleSortChange">
             <el-table-column label="预览" width="80" align="center">
                 <template slot-scope="scope">
-                    <el-image 
+                    <el-image
                         v-if="isImage(scope.row.mediaType)"
-                        :src="getPreviewUrl(scope.row.filePath)" 
+                        :src="getPreviewUrl(scope.row.filePath)"
                         :preview-src-list="[getPreviewUrl(scope.row.filePath)]"
                         style="width: 60px; height: 60px"
                         fit="cover">
+                        <div slot="placeholder" class="image-placeholder">
+                            <i class="el-icon-loading"></i>
+                        </div>
                         <div slot="error" class="image-error">
                             <i class="el-icon-picture-outline"></i>
                         </div>
@@ -55,6 +61,16 @@
                     <span class="file-name" :title="scope.row.filePath">{{ scope.row.fileName }}</span>
                 </template>
             </el-table-column>
+            <el-table-column label="路径" min-width="160">
+                <template slot-scope="scope">
+                    <div class="path-cell">
+                        <span class="file-path" :title="scope.row.filePath">{{ scope.row.filePath }}</span>
+                        <el-tooltip content="复制路径" placement="top">
+                            <i class="el-icon-document-copy copy-icon" @click="copyPath(scope.row.filePath)"/>
+                        </el-tooltip>
+                    </div>
+                </template>
+            </el-table-column>
             <el-table-column label="类型" width="80" align="center">
                 <template slot-scope="scope">
                     <el-tag :type="typeTag(scope.row.mediaType)" size="small">{{ typeName(scope.row.mediaType) }}</el-tag>
@@ -89,6 +105,21 @@
                     <span v-else class="muted">-</span>
                 </template>
             </el-table-column>
+            <el-table-column label="动漫色情检测" width="140" align="center">
+                <template slot-scope="scope">
+                    <div v-if="scope.row.animeNsfwScore > 0">
+                        <el-tag :type="scope.row.animeNsfwScore >= scope.row.animeNsfwThreshold ? 'danger' : 'warning'" size="small">
+                            {{ (scope.row.animeNsfwScore * 100).toFixed(1) }}%
+                        </el-tag>
+                        <div class="nsfw-threshold">阈值: {{ (scope.row.animeNsfwThreshold * 100).toFixed(0) }}%</div>
+                    </div>
+                    <div v-else-if="scope.row.animeNsfwRatings">
+                        <el-tag type="info" size="small">安全</el-tag>
+                        <div class="nsfw-threshold">{{ formatAnimeRatings(scope.row.animeNsfwRatings) }}</div>
+                    </div>
+                    <span v-else class="muted">-</span>
+                </template>
+            </el-table-column>
             <el-table-column label="色情标记" width="100" align="center">
                 <template slot-scope="scope">
                     <el-switch
@@ -159,6 +190,7 @@ export default {
     data() {
         return {
             loading: false,
+            manualNsfwAvg: 0,
             list: [],
             total: 0,
             resolutionOptions: RES_STANDARD.concat(resNonStandard()),
@@ -182,6 +214,7 @@ export default {
     mounted() {
         this.loadOptions()
         this.loadList()
+        this.loadManualNsfwAvg()
     },
     methods: {
         async loadOptions() {
@@ -255,15 +288,52 @@ export default {
             try {
                 await request.put(`/api/media/${row.id}/manual-nsfw`, { value: newValue })
                 row.manualNsfw = newValue
+                this.loadManualNsfwAvg()
             } catch (e) {
                 // 拦截器已提示
             }
+        },
+        async loadManualNsfwAvg() {
+            try {
+                const res = await request.get('/api/media/manual-nsfw-avg')
+                this.manualNsfwAvg = (res.data && res.data.avg) || 0
+            } catch (e) {
+                // 忽略
+            }
+        },
+        copyPath(path) {
+            navigator.clipboard.writeText(path).then(() => {
+                this.$message.success('路径已复制')
+            }).catch(() => {
+                this.$message.error('复制失败')
+            })
+        },
+        formatAnimeRatings(ratingsJson) {
+            if (!ratingsJson) return ''
+            try {
+                const r = JSON.parse(ratingsJson)
+                return `G=${(r.general * 100).toFixed(0)} S=${(r.sensitive * 100).toFixed(0)} Q=${(r.questionable * 100).toFixed(0)} E=${(r.explicit * 100).toFixed(0)}`
+            } catch (e) {
+                return ''
+            }
         }
     }
 }
 </script>
 
 <style scoped>
+.toolbar-left {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+}
+
+.nsfw-avg {
+    font-size: 13px;
+    color: #F56C6C;
+    font-weight: 500;
+}
+
 .filter-bar {
     display: flex;
     gap: 10px;
@@ -276,6 +346,44 @@ export default {
     color: #1f3a6b;
 }
 
+.file-path {
+    color: #606266;
+    font-size: 12px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    flex: 1;
+}
+
+.path-cell {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    overflow: hidden;
+}
+
+.copy-icon {
+    cursor: pointer;
+    color: #909399;
+    font-size: 14px;
+    flex-shrink: 0;
+}
+
+.copy-icon:hover {
+    color: #409EFF;
+}
+
+.image-placeholder {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 60px;
+    height: 60px;
+    background: #f5f7fa;
+    color: #c0c4cc;
+    font-size: 20px;
+}
+
 .muted {
     color: #c0c4cc;
 }