feat(工具栏): 将类型筛选器从下拉框改为自定义菜单组件

重构类型筛选器交互方式，使用自定义菜单组件替代原生下拉框，提升用户体验
- 添加菜单打开/关闭状态管理
- 实现点击外部区域或按ESC键关闭菜单
- 添加菜单项选中状态和键盘导航支持
- 优化按钮和菜单项的样式和交互效果

src/content/components/toolbar.ts

@@ -1,5 +1,5 @@
 import { LitElement, html, css } from 'lit';
-import { customElement, property } from 'lit/decorators.js';
+import { customElement, property, state } from 'lit/decorators.js';
 import { FileType } from '../../types/file-selector';
 import { I18nService } from '../../utils/i18n';
 
@@ -48,6 +48,46 @@ export class Toolbar extends LitElement {
   @property({ type: Boolean })
   disabled = false;
 
+  @state()
+  private typeMenuOpen = false;
+
+  private documentClickHandler: ((e: MouseEvent) => void) | null = null;
+  private documentKeydownHandler: ((e: KeyboardEvent) => void) | null = null;
+
+  connectedCallback() {
+    super.connectedCallback();
+
+    this.documentClickHandler = (e: MouseEvent) => {
+      if (!this.typeMenuOpen) return;
+      const path = e.composedPath();
+      if (path.includes(this)) return;
+      this.closeTypeMenu();
+    };
+
+    this.documentKeydownHandler = (e: KeyboardEvent) => {
+      if (!this.typeMenuOpen) return;
+      if (e.key !== 'Escape') return;
+      e.preventDefault();
+      this.closeTypeMenu({ focusButton: true });
+    };
+
+    document.addEventListener('click', this.documentClickHandler);
+    document.addEventListener('keydown', this.documentKeydownHandler);
+  }
+
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    if (this.documentClickHandler) {
+      document.removeEventListener('click', this.documentClickHandler);
+      this.documentClickHandler = null;
+    }
+    if (this.documentKeydownHandler) {
+      document.removeEventListener('keydown', this.documentKeydownHandler);
+      this.documentKeydownHandler = null;
+    }
+  }
+
   /**
    * Computed: checkbox state
    * Returns 'all', 'none', or 'partial'
@@ -84,13 +124,10 @@ export class Toolbar extends LitElement {
   }
 
   /**
-   * Handle type filter change
+   * Handle type filter selection
    * @private
    */
-  private handleTypeFilterChange(e: Event): void {
-    const select = e.target as HTMLSelectElement;
-    const type = select.value as FileType | 'all';
-
+  private selectType(type: FileType | 'all'): void {
     this.dispatchEvent(
       new CustomEvent('type-filter', {
         detail: { type },
@@ -100,14 +137,71 @@ export class Toolbar extends LitElement {
     );
   }
 
+  private getTypeLabel(type: FileType | 'all'): string {
+    switch (type) {
+      case 'all':
+        return I18nService.t('all_types');
+      case 'video':
+        return I18nService.t('type_video');
+      case 'image':
+        return I18nService.t('type_image');
+      case 'audio':
+        return I18nService.t('type_audio');
+      case 'document':
+        return I18nService.t('type_document');
+      case 'other':
+        return I18nService.t('type_other');
+    }
+  }
+
+  private toggleTypeMenu(): void {
+    if (this.disabled) return;
+    this.typeMenuOpen = !this.typeMenuOpen;
+
+    if (this.typeMenuOpen) {
+      requestAnimationFrame(() => {
+        const selected =
+          this.shadowRoot?.querySelector<HTMLButtonElement>('.type-menu-item[data-selected="true"]') ||
+          this.shadowRoot?.querySelector<HTMLButtonElement>('.type-menu-item');
+        selected?.focus();
+      });
+    }
+  }
+
+  private closeTypeMenu(options?: { focusButton?: boolean }): void {
+    if (!this.typeMenuOpen) return;
+    this.typeMenuOpen = false;
+
+    if (options?.focusButton) {
+      requestAnimationFrame(() => {
+        const button = this.shadowRoot?.getElementById('type-filter-button') as HTMLButtonElement | null;
+        button?.focus();
+      });
+    }
+  }
+
+  private handleTypeMenuItemClick(type: FileType | 'all'): void {
+    if (this.disabled) return;
+    this.closeTypeMenu({ focusButton: true });
+    this.selectType(type);
+  }
+
   render() {
     const state = this.checkboxState;
+    const typeOptions: Array<{ value: FileType | 'all'; label: string }> = [
+      { value: 'all', label: I18nService.t('all_types') },
+      { value: 'video', label: I18nService.t('type_video') },
+      { value: 'image', label: I18nService.t('type_image') },
+      { value: 'audio', label: I18nService.t('type_audio') },
+      { value: 'document', label: I18nService.t('type_document') },
+      { value: 'other', label: I18nService.t('type_other') },
+    ];
 
     return html`
       <div class="toolbar">
-        <div class="toolbar-left">
-          <label
-            class="checkbox-label ${this.disabled ? 'disabled' : ''}"
+	        <div class="toolbar-left">
+	          <label
+	            class="checkbox-label ${this.disabled ? 'disabled' : ''}"
             title=${state === 'all'
               ? I18nService.t('deselect_all')
               : I18nService.t('select_all')}
@@ -131,23 +225,70 @@ export class Toolbar extends LitElement {
                 : ''}
             </div>
             <span class="checkbox-text">${I18nService.t('select_all_checkbox')}</span>
-          </label>
+	          </label>
 
-          <div class="filter-group">
-            <label class="filter-label">${I18nService.t('filter_by_type')}:</label>
-            <select
-              class="type-filter"
-              .value=${this.typeFilter}
-              @change=${this.handleTypeFilterChange}
-              ?disabled=${this.disabled}
-            >
-              <option value="all">${I18nService.t('all_types')}</option>
-              <option value="video">${I18nService.t('type_video')}</option>
-              <option value="image">${I18nService.t('type_image')}</option>
-              <option value="audio">${I18nService.t('type_audio')}</option>
-              <option value="document">${I18nService.t('type_document')}</option>
-              <option value="other">${I18nService.t('type_other')}</option>
-            </select>
+	          <div class="filter-group">
+	            <div class="type-select">
+	              <button
+	                class="type-button"
+	                id="type-filter-button"
+	                type="button"
+	                aria-haspopup="menu"
+	                aria-expanded=${this.typeMenuOpen ? 'true' : 'false'}
+	                aria-label=${`${I18nService.t('filter_by_type')}: ${this.getTypeLabel(this.typeFilter)}`}
+	                title=${`${I18nService.t('filter_by_type')}: ${this.getTypeLabel(this.typeFilter)}`}
+	                data-active=${this.typeFilter === 'all' ? 'false' : 'true'}
+	                ?disabled=${this.disabled}
+	                @click=${this.toggleTypeMenu}
+	              >
+	                <span class="sr-only">${I18nService.t('filter_by_type')}</span>
+	                <svg
+	                  class="type-button-icon"
+	                  viewBox="0 0 24 24"
+	                  fill="none"
+	                  stroke="currentColor"
+	                  stroke-width="2"
+	                  stroke-linecap="round"
+	                  stroke-linejoin="round"
+	                  aria-hidden="true"
+	                  focusable="false"
+	                >
+	                  <polygon points="22 3 2 3 10 12 10 19 14 21 14 12 22 3"></polygon>
+	                </svg>
+	                <span class="type-button-text">${this.getTypeLabel(this.typeFilter)}</span>
+	                <svg
+	                  class="type-button-chevron"
+	                  viewBox="0 0 20 20"
+	                  fill="none"
+	                  stroke="currentColor"
+	                  stroke-width="2"
+	                  stroke-linecap="round"
+	                  stroke-linejoin="round"
+	                  aria-hidden="true"
+	                  focusable="false"
+	                >
+	                  <path d="M6 8l4 4 4-4"></path>
+	                </svg>
+	              </button>
+
+	              <div class="type-menu" role="menu" aria-label=${I18nService.t('filter_by_type')} ?hidden=${!this.typeMenuOpen}>
+                ${typeOptions.map(({ value, label }) => {
+                  const selected = value === this.typeFilter;
+                  return html`
+                    <button
+                      class="type-menu-item"
+                      type="button"
+                      role="menuitemradio"
+                      aria-checked=${selected ? 'true' : 'false'}
+                      data-selected=${selected ? 'true' : 'false'}
+                      @click=${() => this.handleTypeMenuItemClick(value)}
+                    >
+                      ${label}
+                    </button>
+                  `;
+                })}
+              </div>
+            </div>
           </div>
         </div>
 
@@ -260,44 +401,151 @@ export class Toolbar extends LitElement {
       color: var(--cdr-text-disabled, #bfbfbf);
     }
 
-    .filter-group {
+	    .filter-group {
+	      display: flex;
+	      align-items: center;
+	      gap: 8px;
+	    }
+
+	    .sr-only {
+	      position: absolute;
+	      width: 1px;
+	      height: 1px;
+	      padding: 0;
+	      margin: -1px;
+	      overflow: hidden;
+	      clip: rect(0, 0, 0, 0);
+	      white-space: nowrap;
+	      border: 0;
+	    }
+
+	    .type-select {
+	      position: relative;
+	      display: inline-flex;
+	      align-items: center;
+	      flex-shrink: 0;
+	    }
+
+	    .type-button {
+	      width: auto;
+	      height: 32px;
+	      padding: 0 10px 0 8px;
+	      border: 1px solid var(--cdr-border-strong, #d9d9d9);
+	      border-radius: 6px;
+	      color: var(--cdr-text, #262626);
+	      background: var(--cdr-surface, #fff);
+	      cursor: pointer;
+	      transition: all 0.2s;
+	      display: inline-flex;
+	      align-items: center;
+	      justify-content: flex-start;
+	      gap: 6px;
+	      min-width: 0;
+	    }
+
+	    .type-button:hover:not(:disabled) {
+	      background: var(--cdr-surface-hover, #f5f5f5);
+	      border-color: var(--cdr-primary, #1890ff);
+	    }
+
+	    .type-button[data-active='true']:hover:not(:disabled) {
+	      background: var(--cdr-selection-hover-bg, rgba(24, 144, 255, 0.12));
+	    }
+
+	    .type-button:focus-visible {
+	      outline: none;
+	      border-color: var(--cdr-primary, #1890ff);
+	      box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
+	    }
+
+	    .type-button:disabled {
+	      cursor: not-allowed;
+	      opacity: 0.45;
+	    }
+
+	    .type-button[data-active='true'] {
+	      border-color: var(--cdr-primary, #1890ff);
+	      background: var(--cdr-selection-bg, rgba(24, 144, 255, 0.08));
+	      color: var(--cdr-primary, #1890ff);
+	    }
+
+	    .type-button-icon {
+	      width: 16px;
+	      height: 16px;
+	      flex-shrink: 0;
+	      opacity: 0.9;
+	    }
+
+	    .type-button-text {
+	      font-size: 13px;
+	      overflow: hidden;
+	      text-overflow: ellipsis;
+	      white-space: nowrap;
+	      max-width: 96px;
+	      min-width: 0;
+	    }
+
+	    .type-button-chevron {
+	      width: 14px;
+	      height: 14px;
+	      flex-shrink: 0;
+	      opacity: 0.8;
+	    }
+
+	    .type-menu {
+	      position: absolute;
+	      top: calc(100% + 6px);
+	      left: 0;
+	      width: 180px;
+	      padding: 6px;
+	      background: var(--cdr-surface, #fff);
+	      border: 1px solid var(--cdr-border-strong, #d9d9d9);
+	      border-radius: 8px;
+	      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
+	      z-index: 1000;
+	    }
+
+    .type-menu-item {
+      width: 100%;
       display: flex;
       align-items: center;
-      gap: 8px;
-    }
-
-    .filter-label {
-      font-size: 14px;
-      color: var(--cdr-text-secondary, #595959);
-      white-space: nowrap;
-    }
-
-    .type-filter {
-      padding: 6px 12px;
-      border: 1px solid var(--cdr-border-strong, #d9d9d9);
-      border-radius: 4px;
-      font-size: 14px;
+      justify-content: space-between;
+      padding: 8px 10px;
+      border: none;
+      border-radius: 6px;
+      background: transparent;
       color: var(--cdr-text, #262626);
-      background: var(--cdr-surface, #fff);
+      font-size: 13px;
       cursor: pointer;
-      transition: all 0.2s;
-      min-width: 120px;
+      transition: background 0.2s, color 0.2s;
     }
 
-    .type-filter:hover:not(:disabled) {
-      border-color: var(--cdr-primary, #1890ff);
+    .type-menu-item::after {
+      content: '';
+      width: 16px;
+      text-align: right;
+      color: var(--cdr-primary, #1890ff);
+      font-size: 12px;
+      line-height: 1;
+      flex-shrink: 0;
     }
 
-    .type-filter:focus {
+    .type-menu-item:hover {
+      background: var(--cdr-surface-hover, #f5f5f5);
+    }
+
+    .type-menu-item:focus-visible {
       outline: none;
-      border-color: #1890ff;
       box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
     }
 
-    .type-filter:disabled {
-      color: var(--cdr-text-disabled, #bfbfbf);
-      cursor: not-allowed;
-      opacity: 0.6;
+    .type-menu-item[data-selected='true'] {
+      background: var(--cdr-selection-bg, rgba(24, 144, 255, 0.08));
+      color: var(--cdr-primary, #1890ff);
+    }
+
+    .type-menu-item[data-selected='true']::after {
+      content: '✓';
     }
 
     .selected-count {

src/shared/version.ts

@@ -10,7 +10,7 @@
  * 1. Edit version in package.json
  * 2. Run: npm run sync:version (or automatically via prebuild/predev)
  *
- * Generated at: 2025-12-30T08:23:44.405Z
+ * Generated at: 2025-12-30T09:19:07.792Z
  */
 
 /**