feat(services): introduce DeesServiceLibLoader to lazy-load heavy client libraries from CDN and update components to use it

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 { FitAddon } from 'xterm-addon-fit';
+import type { Terminal } from 'xterm';
+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
-    this.terminal = new Terminal({
+    // Load xterm from CDN
+    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();