feat(appui-tabs): add closeable tabs and auto-hide behavior for content tabs, plus API and events to control them

ts_web/elements/00group-appui/dees-appui-tabs/dees-appui-tabs.ts

@@ -33,6 +33,12 @@ export class DeesAppuiTabs extends DeesElement {
   @property({ type: String })
   accessor tabStyle: 'horizontal' | 'vertical' = 'horizontal';
 
+  @property({ type: Boolean })
+  accessor autoHide: boolean = false;
+
+  @property({ type: Number })
+  accessor autoHideThreshold: number = 0;
+
   public static styles = [
     themeDefaultStyles,
     cssManager.defaultStyles,
@@ -198,10 +204,50 @@ export class DeesAppuiTabs extends DeesElement {
         z-index: 1;
         box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
       }
+
+      /* Close button */
+      .tab-close {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: 16px;
+        height: 16px;
+        border-radius: 4px;
+        margin-left: 8px;
+        opacity: 0.4;
+        transition: opacity 0.15s, background 0.15s;
+        color: ${cssManager.bdTheme('#71717a', '#71717a')};
+      }
+
+      .tab:hover .tab-close {
+        opacity: 0.7;
+      }
+
+      .tab-close:hover {
+        opacity: 1;
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.1)', 'rgba(255,255,255,0.1)')};
+        color: ${cssManager.bdTheme('#ef4444', '#f87171')};
+      }
+
+      .tab.selectedTab .tab-close {
+        opacity: 0.5;
+      }
+
+      .tab.selectedTab:hover .tab-close {
+        opacity: 0.8;
+      }
+
+      .tab.selectedTab .tab-close:hover {
+        opacity: 1;
+      }
     `,
   ];
 
   public render(): TemplateResult {
+    // Auto-hide when enabled and tab count is at or below threshold
+    if (this.autoHide && this.tabs.length <= this.autoHideThreshold) {
+      return html``;
+    }
     return html`
       ${this.renderTabsWrapper()}
     `;
@@ -225,15 +271,23 @@ export class DeesAppuiTabs extends DeesElement {
   private renderTab(tab: interfaces.IMenuItem, isHorizontal: boolean): TemplateResult {
     const isSelected = tab === this.selectedTab;
     const classes = `tab ${isSelected ? 'selectedTab' : ''}`;
-    
+
+    const closeButton = tab.closeable ? html`
+      <span class="tab-close" @click="${(e: Event) => this.closeTab(e, tab)}">
+        <dees-icon .icon=${'lucide:x'} style="font-size: 12px;"></dees-icon>
+      </span>
+    ` : '';
+
     const content = isHorizontal ? html`
       <span class="tab-content">
         ${this.renderTabIcon(tab)}
         ${tab.key}
       </span>
+      ${closeButton}
     ` : html`
       ${this.renderTabIcon(tab)}
       ${tab.key}
+      ${closeButton}
     `;
 
     return html`
@@ -253,7 +307,7 @@ export class DeesAppuiTabs extends DeesElement {
   private selectTab(tabArg: interfaces.IMenuItem) {
     this.selectedTab = tabArg;
     tabArg.action();
-    
+
     // Emit tab-select event
     this.dispatchEvent(new CustomEvent('tab-select', {
       detail: { tab: tabArg },
@@ -262,6 +316,22 @@ export class DeesAppuiTabs extends DeesElement {
     }));
   }
 
+  private closeTab(e: Event, tab: interfaces.IMenuItem) {
+    e.stopPropagation();  // Don't select tab when closing
+
+    // Call the tab's onClose callback if defined
+    if (tab.onClose) {
+      tab.onClose();
+    }
+
+    // Also emit event for parent components
+    this.dispatchEvent(new CustomEvent('tab-close', {
+      detail: { tab },
+      bubbles: true,
+      composed: true
+    }));
+  }
+
   firstUpdated() {
     if (this.tabs && this.tabs.length > 0) {
       this.selectTab(this.tabs[0]);