feat(selection): implement marquee selection for bulk operations

locales/de.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count} ausgewählt",
             "selectedSuffix": "ausgewählt",
-            "viewSelected": "Klicken Sie, um ausgewählte Elemente anzuzeigen",
-            "addTags": "Tags hinzufügen",
-            "sendToWorkflow": "An Workflow senden",
-            "copyAll": "Alle kopieren",
-            "refreshAll": "Alle aktualisieren",
-            "moveAll": "Alle verschieben",
-            "deleteAll": "Alle löschen",
-            "clear": "Leeren"
+            "viewSelected": "Auswahl anzeigen",
+            "addTags": "Allen Tags hinzufügen",
+            "copyAll": "Alle Syntax kopieren",
+            "refreshAll": "Alle Metadaten aktualisieren",
+            "moveAll": "Alle in Ordner verschieben",
+            "deleteAll": "Alle Modelle löschen",
+            "clear": "Auswahl löschen"
         },
         "contextMenu": {
             "refreshMetadata": "Civitai-Daten aktualisieren",
@@ -983,6 +982,7 @@
             "deleteFailed": "Fehler: {error}",
             "deleteFailedGeneral": "Fehler beim Löschen der Modelle",
             "selectedAdditional": "{count} zusätzliche {type}(s) ausgewählt",
+            "marqueeSelectionComplete": "{count} {type}(s) mit Rahmenauswahl ausgewählt",
             "refreshMetadataFailed": "Fehler beim Aktualisieren der Metadaten",
             "nameCannotBeEmpty": "Modellname darf nicht leer sein",
             "nameUpdatedSuccessfully": "Modellname erfolgreich aktualisiert",

locales/en.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count} selected",
             "selectedSuffix": "selected",
-            "viewSelected": "Click to view selected items",
-            "addTags": "Add Tags",
-            "sendToWorkflow": "Send to Workflow",
-            "copyAll": "Copy All",
-            "refreshAll": "Refresh All",
-            "moveAll": "Move All",
-            "deleteAll": "Delete All",
-            "clear": "Clear"
+            "viewSelected": "View Selected",
+            "addTags": "Add Tags to All",
+            "copyAll": "Copy All Syntax",
+            "refreshAll": "Refresh All Metadata",
+            "moveAll": "Move All to Folder",
+            "deleteAll": "Delete All Models",
+            "clear": "Clear Selection"
         },
         "contextMenu": {
             "refreshMetadata": "Refresh Civitai Data",
@@ -983,6 +982,7 @@
             "deleteFailed": "Error: {error}",
             "deleteFailedGeneral": "Failed to delete models",
             "selectedAdditional": "Selected {count} additional {type}(s)",
+            "marqueeSelectionComplete": "Selected {count} {type}(s) with marquee selection",
             "refreshMetadataFailed": "Failed to refresh metadata",
             "nameCannotBeEmpty": "Model name cannot be empty",
             "nameUpdatedSuccessfully": "Model name updated successfully",

locales/es.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count} seleccionados",
             "selectedSuffix": "seleccionados",
-            "viewSelected": "Clic para ver elementos seleccionados",
-            "addTags": "Añadir etiquetas",
-            "sendToWorkflow": "Enviar al flujo de trabajo",
-            "copyAll": "Copiar todo",
-            "refreshAll": "Actualizar todo",
-            "moveAll": "Mover todo",
-            "deleteAll": "Eliminar todo",
-            "clear": "Limpiar"
+            "viewSelected": "Ver seleccionados",
+            "addTags": "Añadir etiquetas a todos",
+            "copyAll": "Copiar toda la sintaxis",
+            "refreshAll": "Actualizar todos los metadatos",
+            "moveAll": "Mover todos a carpeta",
+            "deleteAll": "Eliminar todos los modelos",
+            "clear": "Limpiar selección"
         },
         "contextMenu": {
             "refreshMetadata": "Actualizar datos de Civitai",
@@ -983,6 +982,7 @@
             "deleteFailed": "Error: {error}",
             "deleteFailedGeneral": "Error al eliminar modelos",
             "selectedAdditional": "Seleccionados {count} {type}(s) adicionales",
+            "marqueeSelectionComplete": "Seleccionados {count} {type}(s) con selección de marco",
             "refreshMetadataFailed": "Error al actualizar metadatos",
             "nameCannotBeEmpty": "El nombre del modelo no puede estar vacío",
             "nameUpdatedSuccessfully": "Nombre del modelo actualizado exitosamente",

locales/fr.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count} sélectionné(s)",
             "selectedSuffix": "sélectionné(s)",
-            "viewSelected": "Cliquez pour voir les éléments sélectionnés",
-            "addTags": "Ajouter des tags",
-            "sendToWorkflow": "Envoyer vers le workflow",
-            "copyAll": "Tout copier",
-            "refreshAll": "Tout actualiser",
-            "moveAll": "Tout déplacer",
-            "deleteAll": "Tout supprimer",
-            "clear": "Effacer"
+            "viewSelected": "Voir la sélection",
+            "addTags": "Ajouter des tags à tous",
+            "copyAll": "Copier toute la syntaxe",
+            "refreshAll": "Actualiser toutes les métadonnées",
+            "moveAll": "Déplacer tout vers un dossier",
+            "deleteAll": "Supprimer tous les modèles",
+            "clear": "Effacer la sélection"
         },
         "contextMenu": {
             "refreshMetadata": "Actualiser les données Civitai",
@@ -983,6 +982,7 @@
             "deleteFailed": "Erreur : {error}",
             "deleteFailedGeneral": "Échec de la suppression des modèles",
             "selectedAdditional": "{count} {type}(s) supplémentaire(s) sélectionné(s)",
+            "marqueeSelectionComplete": "{count} {type}(s) sélectionné(s) avec la sélection par glisser-déposer",
             "refreshMetadataFailed": "Échec de l'actualisation des métadonnées",
             "nameCannotBeEmpty": "Le nom du modèle ne peut pas être vide",
             "nameUpdatedSuccessfully": "Nom du modèle mis à jour avec succès",

locales/ja.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count} 選択中",
             "selectedSuffix": "選択中",
-            "viewSelected": "選択したアイテムを表示するにはクリック",
-            "addTags": "タグを追加",
-            "sendToWorkflow": "ワークフローに送信",
-            "copyAll": "すべてコピー",
-            "refreshAll": "すべて更新",
-            "moveAll": "すべて移動",
-            "deleteAll": "すべて削除",
-            "clear": "クリア"
+            "viewSelected": "選択中を表示",
+            "addTags": "すべてにタグを追加",
+            "copyAll": "すべての構文をコピー",
+            "refreshAll": "すべてのメタデータを更新",
+            "moveAll": "すべてをフォルダに移動",
+            "deleteAll": "すべてのモデルを削除",
+            "clear": "選択をクリア"
         },
         "contextMenu": {
             "refreshMetadata": "Civitaiデータを更新",
@@ -983,6 +982,7 @@
             "deleteFailed": "エラー：{error}",
             "deleteFailedGeneral": "モデルの削除に失敗しました",
             "selectedAdditional": "{count} 追加{type}が選択されました",
+            "marqueeSelectionComplete": "マーキー選択で {count} の{type}が選択されました",
             "refreshMetadataFailed": "メタデータの更新に失敗しました",
             "nameCannotBeEmpty": "モデル名を空にすることはできません",
             "nameUpdatedSuccessfully": "モデル名が正常に更新されました",

locales/ko.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "{count}개 선택됨",
             "selectedSuffix": "개 선택됨",
-            "viewSelected": "선택된 항목 보기",
-            "addTags": "태그 추가",
-            "sendToWorkflow": "워크플로로 전송",
-            "copyAll": "모두 복사",
-            "refreshAll": "모두 새로고침",
-            "moveAll": "모두 이동",
-            "deleteAll": "모두 삭제",
-            "clear": "지우기"
+            "viewSelected": "선택 항목 보기",
+            "addTags": "모두에 태그 추가",
+            "copyAll": "모든 문법 복사",
+            "refreshAll": "모든 메타데이터 새로고침",
+            "moveAll": "모두 폴더로 이동",
+            "deleteAll": "모든 모델 삭제",
+            "clear": "선택 지우기"
         },
         "contextMenu": {
             "refreshMetadata": "Civitai 데이터 새로고침",
@@ -983,6 +982,7 @@
             "deleteFailed": "오류: {error}",
             "deleteFailedGeneral": "모델 삭제에 실패했습니다",
             "selectedAdditional": "추가로 {count}개의 {type}이(가) 선택되었습니다",
+            "marqueeSelectionComplete": "마키 선택으로 {count}개의 {type}이(가) 선택되었습니다",
             "refreshMetadataFailed": "메타데이터 새로고침에 실패했습니다",
             "nameCannotBeEmpty": "모델 이름은 비어있을 수 없습니다",
             "nameUpdatedSuccessfully": "모델 이름이 성공적으로 업데이트되었습니다",

locales/ru.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "Выбрано {count}",
             "selectedSuffix": "выбрано",
-            "viewSelected": "Нажмите для просмотра выбранных элементов",
-            "addTags": "Добавить теги",
-            "sendToWorkflow": "Отправить в Workflow",
-            "copyAll": "Копировать все",
-            "refreshAll": "Обновить все",
-            "moveAll": "Переместить все",
-            "deleteAll": "Удалить все",
-            "clear": "Очистить"
+            "viewSelected": "Просмотреть выбранные",
+            "addTags": "Добавить теги ко всем",
+            "copyAll": "Копировать весь синтаксис",
+            "refreshAll": "Обновить все метаданные",
+            "moveAll": "Переместить все в папку",
+            "deleteAll": "Удалить все модели",
+            "clear": "Очистить выбор"
         },
         "contextMenu": {
             "refreshMetadata": "Обновить данные Civitai",
@@ -983,6 +982,7 @@
             "deleteFailed": "Ошибка: {error}",
             "deleteFailedGeneral": "Не удалось удалить модели",
             "selectedAdditional": "Выбрано дополнительно {count} {type}(ей)",
+            "marqueeSelectionComplete": "Выбрано {count} {type} с помощью выделения рамкой",
             "refreshMetadataFailed": "Не удалось обновить метаданные",
             "nameCannotBeEmpty": "Название модели не может быть пустым",
             "nameUpdatedSuccessfully": "Название модели успешно обновлено",

locales/zh-CN.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "已选中 {count} 项",
             "selectedSuffix": "已选中",
-            "viewSelected": "点击查看已选项目",
-            "addTags": "批量添加标签",
-            "sendToWorkflow": "发送到工作流",
-            "copyAll": "全部复制",
-            "refreshAll": "全部刷新",
-            "moveAll": "全部移动",
-            "deleteAll": "全部删除",
-            "clear": "清除"
+            "viewSelected": "查看已选中",
+            "addTags": "为所有添加标签",
+            "copyAll": "复制全部语法",
+            "refreshAll": "刷新全部元数据",
+            "moveAll": "全部移动到文件夹",
+            "deleteAll": "删除所有模型",
+            "clear": "清除选择"
         },
         "contextMenu": {
             "refreshMetadata": "刷新 Civitai 数据",
@@ -983,6 +982,7 @@
             "deleteFailed": "错误：{error}",
             "deleteFailedGeneral": "删除模型失败",
             "selectedAdditional": "已选中 {count} 个额外 {type}",
+            "marqueeSelectionComplete": "框选已选中 {count} 个 {type}",
             "refreshMetadataFailed": "刷新元数据失败",
             "nameCannotBeEmpty": "模型名称不能为空",
             "nameUpdatedSuccessfully": "模型名称更新成功",

locales/zh-TW.json

@@ -318,14 +318,13 @@
         "bulkOperations": {
             "selected": "已選擇 {count} 項",
             "selectedSuffix": "已選擇",
-            "viewSelected": "點擊檢視已選項目",
-            "addTags": "新增標籤",
-            "sendToWorkflow": "傳送到工作流",
-            "copyAll": "全部複製",
-            "refreshAll": "全部刷新",
-            "moveAll": "全部移動",
-            "deleteAll": "全部刪除",
-            "clear": "清除"
+            "viewSelected": "檢視已選取",
+            "addTags": "新增標籤到全部",
+            "copyAll": "複製全部語法",
+            "refreshAll": "刷新全部 metadata",
+            "moveAll": "全部移動到資料夾",
+            "deleteAll": "刪除全部模型",
+            "clear": "清除選取"
         },
         "contextMenu": {
             "refreshMetadata": "刷新 Civitai 資料",
@@ -983,6 +982,7 @@
             "deleteFailed": "錯誤：{error}",
             "deleteFailedGeneral": "刪除模型失敗",
             "selectedAdditional": "已選擇 {count} 個額外 {type}",
+            "marqueeSelectionComplete": "框選已選擇 {count} 個 {type}",
             "refreshMetadataFailed": "刷新 metadata 失敗",
             "nameCannotBeEmpty": "模型名稱不可為空",
             "nameUpdatedSuccessfully": "模型名稱已成功更新",

static/css/components/bulk.css

@@ -1,81 +1,3 @@
-/* Bulk Operations Styles */
-.bulk-operations-panel {
-    position: fixed;
-    bottom: 20px;
-    left: 50%;
-    transform: translateY(100px) translateX(-50%);
-    background: var(--card-bg);
-    border: 1px solid var(--border-color);
-    border-radius: var(--border-radius-base);
-    padding: 12px 16px;
-    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
-    z-index: var(--z-overlay);
-    display: flex;
-    flex-direction: column;
-    min-width: 420px;
-    max-width: 900px;
-    width: auto;
-    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
-    opacity: 0;
-}
-
-.bulk-operations-header {
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-    margin-bottom: 12px;
-    gap: 20px; /* Increase space between count and buttons */
-}
-
-#selectedCount {
-    font-weight: 500;
-    background: var(--bg-color);
-    padding: 6px 12px;
-    border-radius: var(--border-radius-xs);
-    border: 1px solid var(--border-color);
-    min-width: 80px;
-    text-align: center;
-}
-
-.bulk-operations-actions {
-    display: flex;
-    gap: 8px;
-}
-
-.bulk-operations-actions button {
-    padding: 6px 12px;
-    border-radius: var(--border-radius-xs);
-    background: var(--bg-color);
-    border: 1px solid var(--border-color);
-    color: var(--text-color);
-    cursor: pointer;
-    font-size: 14px;
-    white-space: nowrap;
-    min-height: 36px;
-    display: flex;
-    align-items: center;
-    gap: 6px;
-    transition: all 0.2s ease;
-}
-
-.bulk-operations-actions button:hover {
-    background: var(--lora-accent);
-    color: white;
-    border-color: var(--lora-accent);
-}
-
-/* Danger button style - updated to use proper theme variables */
-.bulk-operations-actions button.danger-btn {
-    background: oklch(70% 0.2 29); /* Light red background that works in both themes */
-    color: oklch(98% 0.01 0); /* Almost white text for good contrast */
-    border-color: var(--lora-error);
-}
-
-.bulk-operations-actions button.danger-btn:hover {
-    background: var(--lora-error);
-    color: oklch(100% 0 0); /* Pure white text on hover for maximum contrast */
-}
-
 /* Style for selected cards */
 .model-card.selected {
     box-shadow: 0 0 0 2px var(--lora-accent);
@@ -99,203 +21,29 @@
     z-index: 1;
 }
 
-/* Update bulk operations button to match others when active */
-#bulkOperationsBtn.active {
-    background: var(--lora-accent);
-    color: white;
-    border-color: var(--lora-accent);
-}
-
-@media (max-width: 768px) {
-    .bulk-operations-panel {
-        width: calc(100% - 40px);
-        min-width: unset;
-        max-width: unset;
-        left: 20px;
-        transform: none;
-        border-radius: var(--border-radius-sm);
-    }
-    
-    .bulk-operations-actions {
-        flex-wrap: wrap;
-    }
-}
-
-.bulk-operations-panel.visible {
-    transform: translateY(0) translateX(-50%);
-    opacity: 1;
-}
-
-/* Thumbnail Strip Styles */
-.selected-thumbnails-strip {
+/* Marquee selection styles */
+.marquee-selection {
     position: fixed;
-    bottom: 80px; /* Position above the bulk operations panel */
-    left: 50%;
-    transform: translateX(-50%) translateY(20px);
-    background: var(--card-bg);
-    border: 1px solid var(--border-color);
-    border-radius: var(--border-radius-base);
-    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
-    z-index: calc(var(--z-overlay) - 1); /* Just below the bulk panel z-index */
-    padding: 16px;
-    max-width: 80%;
-    width: auto;
-    transition: all 0.3s ease;
-    opacity: 0;
-    overflow: hidden;
+    border: 2px dashed var(--lora-accent, #007bff);
+    background: rgba(0, 123, 255, 0.1);
+    pointer-events: none;
+    z-index: 9999;
+    border-radius: 2px;
 }
 
-.selected-thumbnails-strip.visible {
-    opacity: 1;
-    transform: translateX(-50%) translateY(0);
+/* Visual feedback when marquee selecting */
+.marquee-selecting {
+    cursor: crosshair;
+    user-select: none;
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
 }
 
-.thumbnails-container {
-    display: flex;
-    gap: 12px;
-    overflow-x: auto;
-    padding-bottom: 8px; /* Space for scrollbar */
-    max-width: 100%;
-    align-items: flex-start;
-}
-
-.selected-thumbnail {
-    position: relative;
-    width: 80px;
-    min-width: 80px; /* Prevent shrinking */
-    border-radius: var(--border-radius-xs);
-    border: 1px solid var(--border-color);
-    overflow: hidden;
-    cursor: pointer;
-    background: var(--bg-color);
-    transition: transform 0.2s ease, box-shadow 0.2s ease;
-}
-
-.selected-thumbnail:hover {
-    transform: translateY(-2px);
-    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
-}
-
-.selected-thumbnail img,
-.selected-thumbnail video {
-    width: 100%;
-    aspect-ratio: 1 / 1;
-    object-fit: cover;
-    display: block;
-}
-
-.thumbnail-name {
-    position: absolute;
-    bottom: 0;
-    left: 0;
-    right: 0;
-    background: rgba(0, 0, 0, 0.6);
-    color: white;
-    font-size: 10px;
-    padding: 3px 5px;
-    text-overflow: ellipsis;
-    white-space: nowrap;
-    overflow: hidden;
-}
-
-.thumbnail-remove {
-    position: absolute;
-    top: 3px;
-    right: 3px;
-    width: 18px;
-    height: 18px;
-    border-radius: 50%;
-    background: rgba(0, 0, 0, 0.5);
-    color: white;
-    border: none;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    cursor: pointer;
-    font-size: 10px;
-    opacity: 0.7;
-    transition: opacity 0.2s ease, background-color 0.2s ease;
-}
-
-.thumbnail-remove:hover {
-    opacity: 1;
-    background: var(--lora-error);
-}
-
-.strip-close-btn {
-    position: absolute;
-    top: 5px;
-    right: 5px;
-    width: 20px;
-    height: 20px;
-    background: none;
-    border: none;
-    color: var(--text-color);
-    cursor: pointer;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    opacity: 0.7;
-    transition: opacity 0.2s ease;
-}
-
-.strip-close-btn:hover {
-    opacity: 1;
-}
-
-/* Style the selectedCount to indicate it's clickable */
-.selectable-count {
-    display: flex;
-    align-items: center;
-    gap: 5px;
-    cursor: pointer;
-    transition: background-color 0.2s ease;
-}
-
-.selectable-count:hover {
-    background: var(--lora-border);
-}
-
-.dropdown-caret {
-    font-size: 12px;
-    visibility: hidden; /* Will be shown via JS when items are selected */
-}
-
-/* Scrollbar styling for the thumbnails container */
-.thumbnails-container::-webkit-scrollbar {
-    height: 6px;
-}
-
-.thumbnails-container::-webkit-scrollbar-track {
-    background: var(--bg-color);
-    border-radius: 3px;
-}
-
-.thumbnails-container::-webkit-scrollbar-thumb {
-    background: var(--border-color);
-    border-radius: 3px;
-}
-
-.thumbnails-container::-webkit-scrollbar-thumb:hover {
-    background: var(--lora-accent);
-}
-
-/* Mobile optimizations */
-@media (max-width: 768px) {
-    .selected-thumbnails-strip {
-        width: calc(100% - 40px);
-        max-width: none;
-        left: 20px;
-        transform: translateY(20px);
-        border-radius: var(--border-radius-sm);
-    }
-    
-    .selected-thumbnails-strip.visible {
-        transform: translateY(0);
-    }
-    
-    .selected-thumbnail {
-        width: 70px;
-        min-width: 70px;
-    }
+/* Prevent text selection during marquee */
+.marquee-selecting * {
+    user-select: none;
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
 }

static/js/managers/BulkManager.js

@@ -12,6 +12,12 @@ export class BulkManager {
         // Remove bulk panel references since we're using context menu now
         this.bulkContextMenu = null; // Will be set by core initialization
         
+        // Marquee selection properties
+        this.isMarqueeActive = false;
+        this.marqueeStart = { x: 0, y: 0 };
+        this.marqueeElement = null;
+        this.initialSelectedModels = new Set();
+        
         // Model type specific action configurations
         this.actionConfig = {
             [MODEL_TYPES.LORA]: {
@@ -44,6 +50,7 @@ export class BulkManager {
     initialize() {
         this.setupEventListeners();
         this.setupGlobalKeyboardListeners();
+        this.setupMarqueeSelection();
     }
 
     setBulkContextMenu(bulkContextMenu) {
@@ -734,6 +741,201 @@ export class BulkManager {
             }
         }
     }
+
+    /**
+     * Setup marquee selection functionality
+     */
+    setupMarqueeSelection() {
+        const container = document.querySelector('.models-container') || document.body;
+        
+        container.addEventListener('mousedown', (e) => {
+            // Disable marquee if any modal is open
+            if (modalManager.isAnyModalOpen()) {
+                return;
+            }
+            // Only start marquee selection on left click in empty areas
+            if (e.button !== 0 || e.target.closest('.model-card') || e.target.closest('button') || e.target.closest('input')) {
+                return;
+            }
+
+            // Prevent text selection during marquee
+            e.preventDefault();
+            
+            this.startMarqueeSelection(e);
+        });
+
+        document.addEventListener('mousemove', (e) => {
+            // Disable marquee update if any modal is open
+            if (modalManager.isAnyModalOpen()) {
+                return;
+            }
+            if (this.isMarqueeActive) {
+                this.updateMarqueeSelection(e);
+            }
+        });
+
+        document.addEventListener('mouseup', (e) => {
+            if (this.isMarqueeActive) {
+                this.endMarqueeSelection(e);
+            }
+        });
+
+        // Prevent context menu during marquee selection
+        document.addEventListener('contextmenu', (e) => {
+            if (this.isMarqueeActive) {
+                e.preventDefault();
+            }
+        });
+    }
+
+    /**
+     * Start marquee selection
+     */
+    startMarqueeSelection(e) {
+        // Store initial mouse position
+        this.marqueeStart.x = e.clientX;
+        this.marqueeStart.y = e.clientY;
+        
+        // Store initial selection state
+        this.initialSelectedModels = new Set(state.selectedModels);
+        
+        // Enter bulk mode if not already active
+        if (!state.bulkMode) {
+            this.toggleBulkMode();
+        }
+        
+        // Create marquee element
+        this.createMarqueeElement();
+        
+        this.isMarqueeActive = true;
+        
+        // Add visual feedback class to body
+        document.body.classList.add('marquee-selecting');
+    }
+
+    /**
+     * Create the visual marquee selection rectangle
+     */
+    createMarqueeElement() {
+        this.marqueeElement = document.createElement('div');
+        this.marqueeElement.className = 'marquee-selection';
+        this.marqueeElement.style.cssText = `
+            position: fixed;
+            border: 2px dashed var(--lora-accent, #007bff);
+            background: rgba(0, 123, 255, 0.1);
+            pointer-events: none;
+            z-index: 9999;
+            left: ${this.marqueeStart.x}px;
+            top: ${this.marqueeStart.y}px;
+            width: 0;
+            height: 0;
+        `;
+        document.body.appendChild(this.marqueeElement);
+    }
+
+    /**
+     * Update marquee selection rectangle and selected items
+     */
+    updateMarqueeSelection(e) {
+        if (!this.marqueeElement) return;
+        
+        const currentX = e.clientX;
+        const currentY = e.clientY;
+        
+        // Calculate rectangle bounds
+        const left = Math.min(this.marqueeStart.x, currentX);
+        const top = Math.min(this.marqueeStart.y, currentY);
+        const width = Math.abs(currentX - this.marqueeStart.x);
+        const height = Math.abs(currentY - this.marqueeStart.y);
+        
+        // Update marquee element position and size
+        this.marqueeElement.style.left = left + 'px';
+        this.marqueeElement.style.top = top + 'px';
+        this.marqueeElement.style.width = width + 'px';
+        this.marqueeElement.style.height = height + 'px';
+        
+        // Check which cards intersect with marquee
+        this.updateCardSelection(left, top, left + width, top + height);
+    }
+
+    /**
+     * Update card selection based on marquee bounds
+     */
+    updateCardSelection(left, top, right, bottom) {
+        const cards = document.querySelectorAll('.model-card');
+        const newSelection = new Set(this.initialSelectedModels);
+        
+        cards.forEach(card => {
+            const rect = card.getBoundingClientRect();
+            
+            // Check if card intersects with marquee rectangle
+            const intersects = !(rect.right < left || 
+                               rect.left > right || 
+                               rect.bottom < top || 
+                               rect.top > bottom);
+            
+            const filepath = card.dataset.filepath;
+            
+            if (intersects) {
+                // Add to selection if intersecting
+                newSelection.add(filepath);
+                card.classList.add('selected');
+                
+                // Cache metadata if not already cached
+                const metadataCache = this.getMetadataCache();
+                if (!metadataCache.has(filepath)) {
+                    metadataCache.set(filepath, {
+                        fileName: card.dataset.file_name,
+                        usageTips: card.dataset.usage_tips,
+                        previewUrl: this.getCardPreviewUrl(card),
+                        isVideo: this.isCardPreviewVideo(card),
+                        modelName: card.dataset.name
+                    });
+                }
+            } else if (!this.initialSelectedModels.has(filepath)) {
+                // Remove from selection if not intersecting and wasn't initially selected
+                newSelection.delete(filepath);
+                card.classList.remove('selected');
+            }
+        });
+        
+        // Update global selection state
+        state.selectedModels = newSelection;
+        
+        // Update context menu header if visible
+        if (this.bulkContextMenu) {
+            this.bulkContextMenu.updateSelectedCountHeader();
+        }
+    }
+
+    /**
+     * End marquee selection
+     */
+    endMarqueeSelection(e) {
+        this.isMarqueeActive = false;
+        
+        // Remove marquee element
+        if (this.marqueeElement) {
+            this.marqueeElement.remove();
+            this.marqueeElement = null;
+        }
+        
+        // Remove visual feedback class
+        document.body.classList.remove('marquee-selecting');
+        
+        // Show toast with selection count if any items were selected
+        const selectionCount = state.selectedModels.size;
+        if (selectionCount > 0) {
+            const currentConfig = MODEL_CONFIG[state.currentPageType];
+            showToast('toast.models.marqueeSelectionComplete', { 
+                count: selectionCount, 
+                type: currentConfig.displayName.toLowerCase() 
+            }, 'success');
+        }
+        
+        // Clear initial selection state
+        this.initialSelectedModels.clear();
+    }
 }
 
 export const bulkManager = new BulkManager();