v3.27.0

changelog.md

@@ -1,5 +1,23 @@
 # Changelog
 
+## 2026-01-01 - 3.27.0 - feat(services)
+introduce DeesServiceLibLoader to lazy-load heavy client libraries from CDN and update components to use it
+
+- Add DeesServiceLibLoader singleton (ts_web/services/DeesServiceLibLoader.ts) to lazily load and cache libraries via jsDelivr ESM: xterm, xterm-addon-fit, highlight.js, ApexCharts, and Tiptap.
+- Inject xterm CSS dynamically to avoid shipping xterm styles in the initial bundle.
+- Expose helper methods preloadAll() and isLoaded(), and typed bundle interfaces (IXtermBundle, IXtermFitAddonBundle, ITiptapBundle).
+- Update components to use runtime-loaded modules: dees-chart-area, dees-dataview-codebox, dees-input-richtext, wysiwyg code block, dees-workspace-terminal, terminal-tab-manager, dees-workspace-terminal-preview.
+- TerminalTabManager now requires setXtermModules(...) before creating tabs and will throw if not initialized; workspace terminal now initializes and passes the loaded modules.
+- Replace direct runtime imports of heavy libs with typed imports and runtime-loaded bundles to reduce initial bundle size and improve load performance.
+
+## 2026-01-01 - 3.26.1 - fix(dees-actionbar)
+animate actionbar hide using grid-template-rows and wait for animation before clearing state
+
+- Switch host layout from block/max-height to grid using grid-template-rows for open/close transitions
+- Add min-height: 0 to .actionbar-item to prevent flex children overflow and collapsing
+- Introduce async hideCurrentBar() that removes 'visible', sets isVisible=false, waits 220ms then clears currentBar and currentResolve
+- processQueue() now calls hideCurrentBar() asynchronously instead of clearing state immediately
+
 ## 2026-01-01 - 3.26.0 - feat(workspace)
 add external file change detection, conflict resolution UI, and diff editor
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@design.estate/dees-catalog",
-  "version": "3.26.0",
+  "version": "3.27.0",
   "private": false,
   "description": "A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.",
   "main": "dist_ts_web/index.js",

ts_web/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-catalog',
-  version: '3.26.0',
+  version: '3.27.0',
   description: 'A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.'
 }

ts_web/elements/00group-chart/dees-chart-area/component.ts

@@ -11,7 +11,8 @@ import { demoFunc } from './demo.js';
 import { chartAreaStyles } from './styles.js';
 import { renderChartArea } from './template.js';
 
-import ApexCharts from 'apexcharts';
+import type ApexCharts from 'apexcharts';
+import { DeesServiceLibLoader } from '../../../services/index.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -151,6 +152,9 @@ export class DeesChartArea extends DeesElement {
   public async firstUpdated() {
     await this.domtoolsPromise;
 
+    // Load ApexCharts from CDN
+    const ApexChartsLib = await DeesServiceLibLoader.getInstance().loadApexCharts();
+
     // Wait for next animation frame to ensure layout is complete
     await new Promise(resolve => requestAnimationFrame(resolve));
     
@@ -353,7 +357,7 @@ export class DeesChartArea extends DeesElement {
     };
     
     try {
-      this.chart = new ApexCharts(this.shadowRoot.querySelector('.chartContainer'), options);
+      this.chart = new ApexChartsLib(this.shadowRoot.querySelector('.chartContainer'), options);
       await this.chart.render();
       
       // Give the chart a moment to fully initialize before resizing

ts_web/elements/00group-dataview/dees-dataview-codebox/dees-dataview-codebox.ts

@@ -10,12 +10,13 @@ import {
 } from '@design.estate/dees-element';
 import { cssGeistFontFamily, cssMonoFontFamily } from '../../00fonts.js';
 
-import hlight from 'highlight.js';
+import type { HLJSApi } from 'highlight.js';
 
 import * as smartstring from '@push.rocks/smartstring';
 
 import * as domtools from '@design.estate/dees-domtools';
 import { DeesContextmenu } from '../../dees-contextmenu/dees-contextmenu.js';
+import { DeesServiceLibLoader } from '../../../services/index.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -229,6 +230,7 @@ export class DeesDataviewCodebox extends DeesElement {
   }
 
   private codeToDisplayStore = '';
+  private highlightJs: HLJSApi | null = null;
 
   public async updated(_changedProperties) {
     super.updated(_changedProperties);
@@ -250,11 +252,17 @@ export class DeesDataviewCodebox extends DeesElement {
       this.codeToDisplay = this.codeToDisplayStore;
     }
     await domtools.plugins.smartdelay.delayFor(0);
+
+    // Load highlight.js from CDN if not already loaded
+    if (!this.highlightJs) {
+      this.highlightJs = await DeesServiceLibLoader.getInstance().loadHighlightJs();
+    }
+
     const localCodeNode = this.shadowRoot.querySelector('code');
-    const html = hlight.highlight(this.codeToDisplayStore, {
+    const highlightedHtml = this.highlightJs.highlight(this.codeToDisplayStore, {
       language: this.progLang,
       ignoreIllegals: true,
     });
-    localCodeNode.innerHTML = html.value;
+    localCodeNode.innerHTML = highlightedHtml.value;
   }
 }

ts_web/elements/00group-input/dees-input-richtext/component.ts

@@ -14,12 +14,8 @@ import {
   query,
 } from '@design.estate/dees-element';
 
-import { Editor } from '@tiptap/core';
+import type { Editor } from '@tiptap/core';
-import StarterKit from '@tiptap/starter-kit';
+import { DeesServiceLibLoader, type ITiptapBundle } from '../../../services/index.js';
-import Underline from '@tiptap/extension-underline';
-import TextAlign from '@tiptap/extension-text-align';
-import Link from '@tiptap/extension-link';
-import Typography from '@tiptap/extension-typography';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -63,6 +59,7 @@ export class DeesInputRichtext extends DeesInputBase<string> {
 
   private editorElement: HTMLElement;
   private linkInputElement: HTMLInputElement;
+  private tiptapBundle: ITiptapBundle | null = null;
 
   public editor: Editor;
 
@@ -233,13 +230,19 @@ export class DeesInputRichtext extends DeesInputBase<string> {
 
   public async firstUpdated() {
     await this.updateComplete;
+
+    // Load Tiptap from CDN
+    this.tiptapBundle = await DeesServiceLibLoader.getInstance().loadTiptap();
+
     this.editorElement = this.shadowRoot.querySelector('.editor-content');
     this.linkInputElement = this.shadowRoot.querySelector('.link-input input');
     this.initializeEditor();
   }
 
   private initializeEditor(): void {
-    if (this.disabled) return;
+    if (this.disabled || !this.tiptapBundle) return;
+
+    const { Editor, StarterKit, Underline, TextAlign, Link, Typography } = this.tiptapBundle;
 
     this.editor = new Editor({
       element: this.editorElement,
@@ -249,7 +252,7 @@ export class DeesInputRichtext extends DeesInputBase<string> {
             levels: [1, 2, 3],
           },
         }),
-        Underline,
+        Underline.configure({}),
         TextAlign.configure({
           types: ['heading', 'paragraph'],
         }),
@@ -259,7 +262,7 @@ export class DeesInputRichtext extends DeesInputBase<string> {
             class: 'editor-link',
           },
         }),
-        Typography,
+        Typography.configure({}),
       ],
       content: this.value || (this.placeholder ? `<p>${this.placeholder}</p>` : ''),
       onUpdate: ({ editor }) => {

ts_web/elements/00group-input/dees-input-wysiwyg/blocks/text/code.block.ts

@@ -2,9 +2,10 @@ import { BaseBlockHandler, type IBlockEventHandlers } from '../block.base.js';
 import type { IBlock } from '../../wysiwyg.types.js';
 import { cssManager } from '@design.estate/dees-element';
 import { WysiwygSelection } from '../../wysiwyg.selection.js';
-import hlight from 'highlight.js';
+import type { HLJSApi } from 'highlight.js';
 import { cssGeistFontFamily, cssMonoFontFamily } from '../../../../00fonts.js';
 import { PROGRAMMING_LANGUAGES } from '../../wysiwyg.constants.js';
+import { DeesServiceLibLoader } from '../../../../../services/index.js';
 
 /**
  * CodeBlockHandler with improved architecture
@@ -20,6 +21,7 @@ export class CodeBlockHandler extends BaseBlockHandler {
   type = 'code';
 
   private highlightTimer: any = null;
+  private highlightJs: HLJSApi | null = null;
   
   render(block: IBlock, isSelected: boolean): string {
     const language = block.metadata?.language || 'typescript';
@@ -306,10 +308,15 @@ export class CodeBlockHandler extends BaseBlockHandler {
     return linesBeforeCursor.length - 1; // 0-indexed
   }
   
-  private applyHighlighting(element: HTMLElement, block: IBlock): void {
+  private async applyHighlighting(element: HTMLElement, block: IBlock): Promise<void> {
     const editor = element.querySelector('.code-editor') as HTMLElement;
     if (!editor) return;
 
+    // Load highlight.js from CDN if not already loaded
+    if (!this.highlightJs) {
+      this.highlightJs = await DeesServiceLibLoader.getInstance().loadHighlightJs();
+    }
+
     // Store cursor position
     const cursorPos = this.getCursorPosition(element);
 
@@ -319,9 +326,9 @@ export class CodeBlockHandler extends BaseBlockHandler {
 
     // Apply highlighting
     try {
-      const result = hlight.highlight(content, { 
+      const result = this.highlightJs.highlight(content, {
         language: language,
-        ignoreIllegals: true 
+        ignoreIllegals: true,
       });
 
       // Only update if we have valid highlighted content

ts_web/elements/00group-workspace/dees-workspace-terminal-preview/dees-workspace-terminal-preview.ts

@@ -7,9 +7,10 @@ import {
   css,
   cssManager,
 } from '@design.estate/dees-element';
-import { Terminal } from 'xterm';
+import type { Terminal } from 'xterm';
-import { FitAddon } from 'xterm-addon-fit';
+import type { FitAddon } from 'xterm-addon-fit';
 import { themeDefaultStyles } from '../../00theme.js';
+import { DeesServiceLibLoader } from '../../../services/index.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -305,8 +306,15 @@ export class DeesWorkspaceTerminalPreview extends DeesElement {
     const domtoolsInstance = await this.domtoolsPromise;
     const isBright = domtoolsInstance.themeManager.goBrightBoolean;
 
-    // Create xterm terminal in read-only mode
+    // Load xterm from CDN
-    this.terminal = new Terminal({
+    const libLoader = DeesServiceLibLoader.getInstance();
+    const [xtermBundle, fitAddonBundle] = await Promise.all([
+      libLoader.loadXterm(),
+      libLoader.loadXtermFitAddon(),
+    ]);
+
+    // Create xterm terminal in read-only mode using CDN-loaded module
+    this.terminal = new xtermBundle.Terminal({
       convertEol: true,
       cursorBlink: false,
       disableStdin: true,
@@ -323,7 +331,7 @@ export class DeesWorkspaceTerminalPreview extends DeesElement {
       }
     });
 
-    this.fitAddon = new FitAddon();
+    this.fitAddon = new fitAddonBundle.FitAddon();
     this.terminal.loadAddon(this.fitAddon);
     this.terminal.open(container);
     this.fitAddon.fit();

ts_web/elements/00group-workspace/dees-workspace-terminal/dees-workspace-terminal.ts

@@ -10,18 +10,20 @@ import {
 } from '@design.estate/dees-element';
 import * as domtools from '@design.estate/dees-domtools';
 
-import { Terminal } from 'xterm';
+import type { Terminal } from 'xterm';
-import { FitAddon } from 'xterm-addon-fit';
 import { themeDefaultStyles } from '../../00theme.js';
 import type { IExecutionEnvironment } from '../../00group-runtime/index.js';
 import { WebContainerEnvironment } from '../../00group-runtime/index.js';
 import '../../dees-icon/dees-icon.js';
+import '../../dees-actionbar/dees-actionbar.js';
+import type { DeesActionbar } from '../../dees-actionbar/dees-actionbar.js';
 import { TerminalTabManager } from './terminal-tab-manager.js';
 import type {
   ITerminalTab,
   ICreateTerminalTabOptions,
   TTerminalTabType,
 } from './interfaces.js';
+import { DeesServiceLibLoader } from '../../../services/index.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -79,6 +81,9 @@ export class DeesWorkspaceTerminal extends DeesElement {
   private terminalThemeSubscription: any = null;
   private isBright: boolean = false;
 
+  // Actionbar reference for terminal-context notifications
+  private terminalActionbar: DeesActionbar | null = null;
+
   /**
    * Promise that resolves when the environment is ready.
    * @deprecated Use executionEnvironment directly
@@ -120,17 +125,21 @@ export class DeesWorkspaceTerminal extends DeesElement {
 
       .terminal-content {
         flex: 1;
-        position: relative;
+        display: flex;
+        flex-direction: column;
         overflow: hidden;
         background: ${cssManager.bdTheme('#ffffff', '#000000')};
       }
 
       #active-terminal-container {
-        position: absolute;
+        flex: 1;
-        top: 20px;
+        position: relative;
-        left: 20px;
+        min-height: 0;
-        right: 20px;
+        margin: 20px;
-        bottom: 20px;
+      }
+
+      .terminal-content dees-actionbar {
+        flex-shrink: 0;
       }
 
       /* Tab bar on the right side */
@@ -426,6 +435,7 @@ export class DeesWorkspaceTerminal extends DeesElement {
               <span>No terminal open</span>
             </div>
           `}
+          <dees-actionbar></dees-actionbar>
         </div>
 
         <!-- Vertical tab bar on the right -->
@@ -485,17 +495,31 @@ export class DeesWorkspaceTerminal extends DeesElement {
       }
     );
 
+    // Load xterm from CDN
+    const libLoader = DeesServiceLibLoader.getInstance();
+    const [xtermBundle, fitAddonBundle] = await Promise.all([
+      libLoader.loadXterm(),
+      libLoader.loadXtermFitAddon(),
+    ]);
+
+    // Initialize tab manager with loaded modules
+    this.tabManager.setXtermModules(xtermBundle, fitAddonBundle);
+
     // Create default shell tab
     await this.createShellTab();
   }
 
   async connectedCallback(): Promise<void> {
     await super.connectedCallback();
-    this.resizeObserver.observe(this);
+    // ResizeObserver is set up in attachTerminalToContainer when the container exists
   }
 
   async disconnectedCallback(): Promise<void> {
-    this.resizeObserver.unobserve(this);
+    // Unobserve the terminal container
+    const container = this.shadowRoot?.getElementById('active-terminal-container');
+    if (container) {
+      this.resizeObserver.unobserve(container);
+    }
     if (this.terminalThemeSubscription) {
       this.terminalThemeSubscription.unsubscribe();
       this.terminalThemeSubscription = null;
@@ -558,6 +582,10 @@ export class DeesWorkspaceTerminal extends DeesElement {
     const container = this.shadowRoot?.getElementById('active-terminal-container');
     if (!container) return;
 
+    // Observe container for resize (handles actionbar appearing/disappearing)
+    // ResizeObserver.observe() is idempotent - safe to call multiple times
+    this.resizeObserver.observe(container);
+
     // Clear container
     container.innerHTML = '';
 
@@ -656,6 +684,36 @@ export class DeesWorkspaceTerminal extends DeesElement {
         detail: { tabId, exitCode },
       })
     );
+
+    // Show actionbar to offer closing the tab (only if tab is closeable)
+    if (tab.closeable) {
+      this.showExitedTabActionbar(tabId, tab.label, exitCode);
+    }
+  }
+
+  /**
+   * Show actionbar offering to close an exited tab
+   */
+  private async showExitedTabActionbar(tabId: string, tabLabel: string, exitCode: number): Promise<void> {
+    const isSuccess = exitCode === 0;
+    const result = await this.showActionbar({
+      message: isSuccess
+        ? `"${tabLabel}" completed. Close tab?`
+        : `"${tabLabel}" exited (code ${exitCode}). Close tab?`,
+      type: isSuccess ? 'info' : 'warning',
+      icon: isSuccess ? 'lucide:checkCircle' : 'lucide:alertTriangle',
+      actions: [
+        { id: 'close', label: 'Close Tab', primary: true },
+        { id: 'keep', label: 'Keep Open' },
+      ],
+      timeout: { duration: 10000, defaultActionId: 'close' },
+      dismissible: true,
+    });
+
+    // Close tab if user clicked "Close Tab" or timeout triggered auto-close
+    if (result.actionId === 'close') {
+      this.closeTab(tabId);
+    }
   }
 
   // ========== Public API ==========
@@ -816,6 +874,19 @@ export class DeesWorkspaceTerminal extends DeesElement {
     return true;
   }
 
+  /**
+   * Show an actionbar notification in the terminal panel context.
+   * Use this for terminal-related decisions (e.g., retry failed process, kill process, etc.)
+   */
+  public async showActionbar(
+    options: Parameters<DeesActionbar['show']>[0]
+  ): Promise<ReturnType<DeesActionbar['show']>> {
+    if (!this.terminalActionbar) {
+      this.terminalActionbar = this.shadowRoot?.querySelector('dees-actionbar') as DeesActionbar;
+    }
+    return this.terminalActionbar?.show(options);
+  }
+
   // ========== Utility Methods ==========
 
   public async waitForPrompt(term: Terminal, prompt: string): Promise<void> {

ts_web/elements/00group-workspace/dees-workspace-terminal/terminal-tab-manager.ts

@@ -1,6 +1,7 @@
-import { Terminal } from 'xterm';
+import type { Terminal, ITerminalOptions } from 'xterm';
-import { FitAddon } from 'xterm-addon-fit';
+import type { FitAddon } from 'xterm-addon-fit';
 import type { ITerminalTab, ICreateTerminalTabOptions, TTerminalTabType } from './interfaces.js';
+import type { IXtermBundle, IXtermFitAddonBundle } from '../../../services/index.js';
 
 /**
  * Manages terminal tabs lifecycle and state
@@ -8,6 +9,17 @@ import type { ITerminalTab, ICreateTerminalTabOptions, TTerminalTabType } from '
 export class TerminalTabManager {
   private tabs: Map<string, ITerminalTab> = new Map();
   private tabCounter: number = 0;
+  private xtermBundle: IXtermBundle | null = null;
+  private xtermFitAddonBundle: IXtermFitAddonBundle | null = null;
+
+  /**
+   * Initialize the manager with loaded xterm modules.
+   * Must be called before creating tabs.
+   */
+  public setXtermModules(xtermBundle: IXtermBundle, fitAddonBundle: IXtermFitAddonBundle): void {
+    this.xtermBundle = xtermBundle;
+    this.xtermFitAddonBundle = fitAddonBundle;
+  }
 
   /**
    * Generate unique tab ID
@@ -96,11 +108,15 @@ export class TerminalTabManager {
    * Create a new tab instance
    */
   createTab(options: ICreateTerminalTabOptions, isBright: boolean): ITerminalTab {
+    if (!this.xtermBundle || !this.xtermFitAddonBundle) {
+      throw new Error('TerminalTabManager: xterm modules not initialized. Call setXtermModules() first.');
+    }
+
     const id = this.generateTabId();
     const type = options.type;
 
-    // Create xterm.js Terminal instance
+    // Create xterm.js Terminal instance using CDN-loaded module
-    const terminal = new Terminal({
+    const terminal = new this.xtermBundle.Terminal({
       convertEol: true,
       cursorBlink: true,
       theme: this.getTerminalTheme(isBright),
@@ -109,8 +125,8 @@ export class TerminalTabManager {
       lineHeight: 1.2,
     });
 
-    // Create FitAddon
+    // Create FitAddon using CDN-loaded module
-    const fitAddon = new FitAddon();
+    const fitAddon = new this.xtermFitAddonBundle.FitAddon();
     terminal.loadAddon(fitAddon);
 
     const tab: ITerminalTab = {

ts_web/elements/00group-workspace/dees-workspace/dees-workspace.ts

@@ -957,6 +957,7 @@ testSmartPromise();
                   ></dees-workspace-monaco>
                 `}
               </div>
+              <dees-actionbar></dees-actionbar>
             </div>
 
             <!-- Horizontal resize handle for terminal -->
@@ -1021,9 +1022,6 @@ testSmartPromise();
           .executionEnvironment=${this.executionEnvironment}
           @run-process=${this.handleRunProcess}
         ></dees-workspace-bottombar>
-
-        <!-- Action Bar for notifications -->
-        <dees-actionbar></dees-actionbar>
       </div>
     `;
   }
@@ -1056,9 +1054,6 @@ testSmartPromise();
     this.currentFileTreeWidth = this.fileTreeWidth;
     this.currentTerminalHeight = this.terminalHeight;
 
-    // Get actionbar reference for file change notifications
-    this.actionbarElement = this.shadowRoot?.querySelector('dees-actionbar') as DeesActionbar;
-
     if (this.executionEnvironment) {
       await this.initializeWorkspace();
     }
@@ -1068,6 +1063,11 @@ testSmartPromise();
     if (changedProperties.has('executionEnvironment') && this.executionEnvironment) {
       await this.initializeWorkspace();
     }
+
+    // Capture actionbar reference when it becomes available (after initialization completes)
+    if (!this.actionbarElement) {
+      this.actionbarElement = this.shadowRoot?.querySelector('.editor-panel dees-actionbar') as DeesActionbar;
+    }
   }
 
   private async initializeWorkspace() {

ts_web/elements/dees-actionbar/dees-actionbar.ts

@@ -128,19 +128,19 @@ export class DeesActionbar extends DeesElement {
     cssManager.defaultStyles,
     css`
       :host {
-        display: block;
+        display: grid;
-        overflow: hidden;
+        grid-template-rows: 0fr;
-        height: 0;
+        transition: grid-template-rows 0.2s ease-out;
-        transition: height 0.2s ease-out;
       }
 
       :host(.visible) {
-        height: auto;
+        grid-template-rows: 1fr;
       }
 
       .actionbar-item {
         display: flex;
         flex-direction: column;
+        min-height: 0;
         background: ${cssManager.bdTheme('hsl(0 0% 96%)', 'hsl(0 0% 12%)')};
         border-top: 1px solid ${cssManager.bdTheme('hsl(0 0% 88%)', 'hsl(0 0% 20%)')};
         overflow: hidden;
@@ -416,12 +416,27 @@ export class DeesActionbar extends DeesElement {
 
   // ========== Private Methods ==========
 
-  private processQueue(): void {
+  /**
-    if (this.queue.length === 0) {
+   * Hide the current actionbar with animation.
+   * Removes visible class first to trigger CSS transition, then clears content after animation.
+   */
+  private async hideCurrentBar(): Promise<void> {
+    // Remove visible class to start close animation
+    this.classList.remove('visible');
+    this.isVisible = false;
+
+    // Wait for animation to complete (200ms transition + buffer)
+    await new Promise(resolve => setTimeout(resolve, 220));
+
+    // Now safe to clear content
     this.currentBar = null;
     this.currentResolve = null;
-      this.isVisible = false;
+  }
-      this.classList.remove('visible');
+
+  private processQueue(): void {
+    if (this.queue.length === 0) {
+      // Hide with animation - don't await, let it run async
+      this.hideCurrentBar();
       return;
     }
 

ts_web/services/DeesServiceLibLoader.ts

@@ -0,0 +1,285 @@
+import { CDN_BASE, CDN_VERSIONS } from './versions.js';
+
+// Type imports (no runtime overhead)
+import type { Terminal, ITerminalOptions } from 'xterm';
+import type { FitAddon } from 'xterm-addon-fit';
+import type { HLJSApi } from 'highlight.js';
+import type ApexChartsType from 'apexcharts';
+import type { Editor, EditorOptions } from '@tiptap/core';
+import type { StarterKitOptions } from '@tiptap/starter-kit';
+import type { UnderlineOptions } from '@tiptap/extension-underline';
+import type { TextAlignOptions } from '@tiptap/extension-text-align';
+import type { LinkOptions } from '@tiptap/extension-link';
+
+/**
+ * Bundle type for xterm and its addons
+ */
+export interface IXtermBundle {
+  Terminal: typeof Terminal;
+}
+
+/**
+ * Bundle type for xterm-addon-fit
+ */
+export interface IXtermFitAddonBundle {
+  FitAddon: typeof FitAddon;
+}
+
+/**
+ * Bundle type for Tiptap editor and extensions
+ */
+export interface ITiptapBundle {
+  Editor: typeof Editor;
+  StarterKit: { configure: (options?: Partial<StarterKitOptions>) => any };
+  Underline: { configure: (options?: Partial<UnderlineOptions>) => any };
+  TextAlign: { configure: (options?: Partial<TextAlignOptions>) => any };
+  Link: { configure: (options?: Partial<LinkOptions>) => any };
+  Typography: { configure: (options?: any) => any };
+}
+
+/**
+ * Singleton service for lazy-loading heavy libraries from CDN.
+ *
+ * This reduces initial bundle size by loading libraries only when needed.
+ * Libraries are cached after first load to avoid duplicate fetches.
+ *
+ * @example
+ * ```typescript
+ * const libLoader = DeesServiceLibLoader.getInstance();
+ * const xterm = await libLoader.loadXterm();
+ * const terminal = new xterm.Terminal({ ... });
+ * ```
+ */
+export class DeesServiceLibLoader {
+  private static instance: DeesServiceLibLoader;
+
+  // Cached library references
+  private xtermLib: IXtermBundle | null = null;
+  private xtermFitAddonLib: IXtermFitAddonBundle | null = null;
+  private highlightJsLib: HLJSApi | null = null;
+  private apexChartsLib: typeof ApexChartsType | null = null;
+  private tiptapLib: ITiptapBundle | null = null;
+
+  // Loading promises to prevent duplicate concurrent loads
+  private xtermLoadingPromise: Promise<IXtermBundle> | null = null;
+  private xtermFitAddonLoadingPromise: Promise<IXtermFitAddonBundle> | null = null;
+  private highlightJsLoadingPromise: Promise<HLJSApi> | null = null;
+  private apexChartsLoadingPromise: Promise<typeof ApexChartsType> | null = null;
+  private tiptapLoadingPromise: Promise<ITiptapBundle> | null = null;
+
+  private constructor() {}
+
+  /**
+   * Get the singleton instance of DeesServiceLibLoader
+   */
+  public static getInstance(): DeesServiceLibLoader {
+    if (!DeesServiceLibLoader.instance) {
+      DeesServiceLibLoader.instance = new DeesServiceLibLoader();
+    }
+    return DeesServiceLibLoader.instance;
+  }
+
+  /**
+   * Load xterm terminal emulator from CDN
+   * @returns Promise resolving to xterm module with Terminal class
+   */
+  public async loadXterm(): Promise<IXtermBundle> {
+    if (this.xtermLib) {
+      return this.xtermLib;
+    }
+
+    if (this.xtermLoadingPromise) {
+      return this.xtermLoadingPromise;
+    }
+
+    this.xtermLoadingPromise = (async () => {
+      const url = `${CDN_BASE}/xterm@${CDN_VERSIONS.xterm}/+esm`;
+      const module = await import(/* @vite-ignore */ url);
+
+      // Also load and inject xterm CSS
+      await this.injectXtermStyles();
+
+      this.xtermLib = {
+        Terminal: module.Terminal,
+      };
+      return this.xtermLib;
+    })();
+
+    return this.xtermLoadingPromise;
+  }
+
+  /**
+   * Load xterm-addon-fit from CDN
+   * @returns Promise resolving to FitAddon class
+   */
+  public async loadXtermFitAddon(): Promise<IXtermFitAddonBundle> {
+    if (this.xtermFitAddonLib) {
+      return this.xtermFitAddonLib;
+    }
+
+    if (this.xtermFitAddonLoadingPromise) {
+      return this.xtermFitAddonLoadingPromise;
+    }
+
+    this.xtermFitAddonLoadingPromise = (async () => {
+      const url = `${CDN_BASE}/xterm-addon-fit@${CDN_VERSIONS.xtermAddonFit}/+esm`;
+      const module = await import(/* @vite-ignore */ url);
+
+      this.xtermFitAddonLib = {
+        FitAddon: module.FitAddon,
+      };
+      return this.xtermFitAddonLib;
+    })();
+
+    return this.xtermFitAddonLoadingPromise;
+  }
+
+  /**
+   * Inject xterm CSS styles into the document head
+   */
+  private async injectXtermStyles(): Promise<void> {
+    const styleId = 'xterm-cdn-styles';
+    if (document.getElementById(styleId)) {
+      return; // Already injected
+    }
+
+    const cssUrl = `${CDN_BASE}/xterm@${CDN_VERSIONS.xterm}/css/xterm.css`;
+    const response = await fetch(cssUrl);
+    const cssText = await response.text();
+
+    const style = document.createElement('style');
+    style.id = styleId;
+    style.textContent = cssText;
+    document.head.appendChild(style);
+  }
+
+  /**
+   * Load highlight.js syntax highlighter from CDN
+   * @returns Promise resolving to highlight.js API
+   */
+  public async loadHighlightJs(): Promise<HLJSApi> {
+    if (this.highlightJsLib) {
+      return this.highlightJsLib;
+    }
+
+    if (this.highlightJsLoadingPromise) {
+      return this.highlightJsLoadingPromise;
+    }
+
+    this.highlightJsLoadingPromise = (async () => {
+      const url = `${CDN_BASE}/highlight.js@${CDN_VERSIONS.highlightJs}/+esm`;
+      const module = await import(/* @vite-ignore */ url);
+
+      this.highlightJsLib = module.default;
+      return this.highlightJsLib;
+    })();
+
+    return this.highlightJsLoadingPromise;
+  }
+
+  /**
+   * Load ApexCharts charting library from CDN
+   * @returns Promise resolving to ApexCharts constructor
+   */
+  public async loadApexCharts(): Promise<typeof ApexChartsType> {
+    if (this.apexChartsLib) {
+      return this.apexChartsLib;
+    }
+
+    if (this.apexChartsLoadingPromise) {
+      return this.apexChartsLoadingPromise;
+    }
+
+    this.apexChartsLoadingPromise = (async () => {
+      const url = `${CDN_BASE}/apexcharts@${CDN_VERSIONS.apexcharts}/+esm`;
+      const module = await import(/* @vite-ignore */ url);
+
+      this.apexChartsLib = module.default;
+      return this.apexChartsLib;
+    })();
+
+    return this.apexChartsLoadingPromise;
+  }
+
+  /**
+   * Load Tiptap rich text editor and extensions from CDN
+   * @returns Promise resolving to Tiptap bundle with Editor and extensions
+   */
+  public async loadTiptap(): Promise<ITiptapBundle> {
+    if (this.tiptapLib) {
+      return this.tiptapLib;
+    }
+
+    if (this.tiptapLoadingPromise) {
+      return this.tiptapLoadingPromise;
+    }
+
+    this.tiptapLoadingPromise = (async () => {
+      const version = CDN_VERSIONS.tiptap;
+
+      // Load all Tiptap modules in parallel
+      const [
+        coreModule,
+        starterKitModule,
+        underlineModule,
+        textAlignModule,
+        linkModule,
+        typographyModule,
+      ] = await Promise.all([
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/core@${version}/+esm`),
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/starter-kit@${version}/+esm`),
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/extension-underline@${version}/+esm`),
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/extension-text-align@${version}/+esm`),
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/extension-link@${version}/+esm`),
+        import(/* @vite-ignore */ `${CDN_BASE}/@tiptap/extension-typography@${version}/+esm`),
+      ]);
+
+      this.tiptapLib = {
+        Editor: coreModule.Editor,
+        StarterKit: starterKitModule.default || starterKitModule.StarterKit,
+        Underline: underlineModule.default || underlineModule.Underline,
+        TextAlign: textAlignModule.default || textAlignModule.TextAlign,
+        Link: linkModule.default || linkModule.Link,
+        Typography: typographyModule.default || typographyModule.Typography,
+      };
+
+      return this.tiptapLib;
+    })();
+
+    return this.tiptapLoadingPromise;
+  }
+
+  /**
+   * Preload multiple libraries in parallel
+   * Useful for warming the cache before components are rendered
+   */
+  public async preloadAll(): Promise<void> {
+    await Promise.all([
+      this.loadXterm(),
+      this.loadXtermFitAddon(),
+      this.loadHighlightJs(),
+      this.loadApexCharts(),
+      this.loadTiptap(),
+    ]);
+  }
+
+  /**
+   * Check if a specific library is already loaded
+   */
+  public isLoaded(library: 'xterm' | 'xtermFitAddon' | 'highlightJs' | 'apexCharts' | 'tiptap'): boolean {
+    switch (library) {
+      case 'xterm':
+        return this.xtermLib !== null;
+      case 'xtermFitAddon':
+        return this.xtermFitAddonLib !== null;
+      case 'highlightJs':
+        return this.highlightJsLib !== null;
+      case 'apexCharts':
+        return this.apexChartsLib !== null;
+      case 'tiptap':
+        return this.tiptapLib !== null;
+      default:
+        return false;
+    }
+  }
+}

ts_web/services/index.ts

@@ -0,0 +1,3 @@
+export { DeesServiceLibLoader } from './DeesServiceLibLoader.js';
+export type { IXtermBundle, IXtermFitAddonBundle, ITiptapBundle } from './DeesServiceLibLoader.js';
+export { CDN_BASE, CDN_VERSIONS } from './versions.js';

ts_web/services/versions.ts

@@ -0,0 +1,17 @@
+/**
+ * CDN versions for lazy-loaded libraries.
+ * Keep these in sync with package.json for type compatibility.
+ */
+export const CDN_VERSIONS = {
+  xterm: '5.3.0',
+  xtermAddonFit: '0.8.0',
+  highlightJs: '11.11.1',
+  apexcharts: '5.3.6',
+  tiptap: '2.23.0',
+  fontawesome: '7.1.0',
+} as const;
+
+/**
+ * Base CDN URL for jsdelivr ESM imports
+ */
+export const CDN_BASE = 'https://cdn.jsdelivr.net/npm';