v3.27.0

changelog.md

@@ -1,5 +1,61 @@
 # 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
+
+- Watch open files for external changes with debounced file watchers (startWatchingFile/stopWatchingFile/stopAllFileWatchers).
+- Prompt the user when disk changes conflict with unsaved local edits via dees-actionbar (actions: Load from Disk, Save Local, Compare).
+- Introduce dees-workspace-diff-editor component and export it; support comparing and resolving diffs (diff-resolved / diff-closed events).
+- Add setContentExternal in dees-workspace-monaco to update editor content from external sources while optionally preserving cursor, selections and scroll position.
+- Start/stop file watchers when files are opened/closed and integrate diff view and actionbar into the workspace UI for seamless conflict handling.
+
+## 2026-01-01 - 3.25.0 - feat(dees-actionbar)
+add action bar component and improve workspace package update handling
+
+- Introduce dees-actionbar component (dees-actionbar.ts) with interfaces, queueing, timed auto-trigger and demo usage
+- Add actionbar.interfaces.ts and index export; export dees-actionbar from elements index
+- Enhance workspace bottombar: add pendingPackageUpdate flag, process-complete handler, and connected/disconnected listeners to auto-refresh package status after updates
+- Make pnpm outdated checking robust by streaming output via a reader and adding a 10s timeout to avoid hanging; handle timeout and stream cancellation
+- Update package update commands to include '--latest' for updatePackage and updateAllPackages, and show 'Checking...' label during checks
+- Add '@types/node' (^22.0.0) to devDependencies in the workspace package config
+
+## 2026-01-01 - 3.24.0 - feat(workspace)
+add workspace bottom bar, terminal tab manager, and run-process integration
+
+- Add dees-workspace-bottombar component and export; bottom bar emits run-process events to launch processes.
+- Introduce terminal interfaces (IRunProcessEventDetail, ITerminalTab, ICreateTerminalTabOptions, etc.) and a TerminalTabManager to manage multiple terminal tabs and lifecycle.
+- Integrate bottombar into dees-workspace: layout refactor (workspace-outer), move/adjust resize handles and panels, and handle @run-process to create terminal tabs and focus terminal panel.
+- Enhance dees-workspace-terminal: tabbed terminal UI, new public APIs (createProcessTab, writeToTab, sendInputToTab), theme updates, and improved disposal/cleanup behavior.
+- Update module exports to include bottombar and additional terminal sub-exports (interfaces, terminal-tab-manager).
+
+## 2025-12-31 - 3.23.0 - feat(workspace)
+add resizable file tree and terminal panes with draggable handles and public layout APIs
+
+- Introduce reactive state for currentFileTreeWidth, currentTerminalHeight, isDraggingFileTree and isDraggingTerminal
+- Add mouse event handlers (mousedown/move/up) to drag-resize the file tree and terminal with min/max clamping
+- Dispatch window resize event after resizing to notify Monaco/editor of layout changes
+- Clean up resize event listeners in disconnectedCallback
+- Initialize current sizes from component properties in firstUpdated
+- Expose public layout methods: setFileTreeWidth, setTerminalHeight, resetLayout
+
 ## 2025-12-31 - 3.22.0 - feat(workspace)
 add resizable markdown editor/preview split with draggable handle and markdown outlet styling/demo
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@design.estate/dees-catalog",
-  "version": "3.22.0",
+  "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: '3.22.0',
+  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 {
@@ -150,7 +151,10 @@ 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 StarterKit from '@tiptap/starter-kit';
-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';
+import type { Editor } from '@tiptap/core';
+import { DeesServiceLibLoader, type ITiptapBundle } from '../../../services/index.js';
 
 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
@@ -18,8 +19,9 @@ import { PROGRAMMING_LANGUAGES } from '../../wysiwyg.constants.js';
  */
 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';
@@ -306,28 +308,33 @@ 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);
-    
+
     // Get plain text content
     const content = editor.textContent || '';
     const language = block.metadata?.language || 'typescript';
-    
+
     // 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
       if (result.value) {
         editor.innerHTML = result.value;
-        
+
         // Restore cursor position if editor is focused
         if (document.activeElement === editor && cursorPos !== null) {
           requestAnimationFrame(() => {

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

@@ -0,0 +1,548 @@
+import {
+  DeesElement,
+  property,
+  html,
+  customElement,
+  type TemplateResult,
+  css,
+  cssManager,
+  state,
+} from '@design.estate/dees-element';
+import { themeDefaultStyles } from '../../00theme.js';
+import type { IExecutionEnvironment } from '../../00group-runtime/index.js';
+import '../../dees-icon/dees-icon.js';
+import { DeesContextmenu } from '../../dees-contextmenu/dees-contextmenu.js';
+import type { IRunProcessEventDetail, ITerminalProcessCompleteEventDetail } from '../dees-workspace-terminal/interfaces.js';
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'dees-workspace-bottombar': DeesWorkspaceBottombar;
+  }
+}
+
+interface IOutdatedPackage {
+  name: string;
+  current: string;
+  wanted: string;
+  latest: string;
+  type: 'dependencies' | 'devDependencies';
+}
+
+@customElement('dees-workspace-bottombar')
+export class DeesWorkspaceBottombar extends DeesElement {
+  // INSTANCE
+  @property({ type: Object })
+  accessor executionEnvironment: IExecutionEnvironment | null = null;
+
+  // Script runner state
+  @state()
+  accessor scripts: Record<string, string> = {};
+
+  // Package checker state
+  @state()
+  accessor packageStatus: 'checking' | 'up-to-date' | 'updates-available' | 'error' | 'idle' = 'idle';
+
+  @state()
+  accessor outdatedPackages: IOutdatedPackage[] = [];
+
+  @state()
+  accessor isCheckingPackages: boolean = false;
+
+  // Track if we have a pending package update that should trigger refresh
+  private pendingPackageUpdate: boolean = false;
+
+  // Bound handler for process-complete events
+  private handleProcessComplete = (e: CustomEvent<ITerminalProcessCompleteEventDetail>) => {
+    // If we have a pending package update and a process completed, refresh
+    if (this.pendingPackageUpdate) {
+      this.pendingPackageUpdate = false;
+      // Small delay to let pnpm-lock.yaml update
+      setTimeout(() => this.checkPackages(), 500);
+    }
+  };
+
+  public static styles = [
+    themeDefaultStyles,
+    cssManager.defaultStyles,
+    css`
+      :host {
+        display: block;
+        height: 24px;
+        flex-shrink: 0;
+      }
+
+      .bottom-bar {
+        height: 24px;
+        display: flex;
+        align-items: center;
+        padding: 0 8px;
+        gap: 4px;
+        background: ${cssManager.bdTheme('hsl(0 0% 94%)', 'hsl(0 0% 6%)')};
+        border-top: 1px solid ${cssManager.bdTheme('hsl(0 0% 85%)', 'hsl(0 0% 15%)')};
+        font-size: 11px;
+        color: ${cssManager.bdTheme('hsl(0 0% 40%)', 'hsl(0 0% 60%)')};
+      }
+
+      .widget {
+        display: flex;
+        align-items: center;
+        gap: 4px;
+        padding: 2px 6px;
+        border-radius: 3px;
+        cursor: pointer;
+        transition: background 0.15s ease, color 0.15s ease;
+        white-space: nowrap;
+      }
+
+      .widget:hover {
+        background: ${cssManager.bdTheme('hsl(0 0% 88%)', 'hsl(0 0% 12%)')};
+        color: ${cssManager.bdTheme('hsl(0 0% 20%)', 'hsl(0 0% 80%)')};
+      }
+
+      .widget dees-icon {
+        flex-shrink: 0;
+      }
+
+      .widget-separator {
+        width: 1px;
+        height: 14px;
+        background: ${cssManager.bdTheme('hsl(0 0% 80%)', 'hsl(0 0% 20%)')};
+        margin: 0 4px;
+      }
+
+      .widget.running {
+        color: ${cssManager.bdTheme('hsl(210 100% 45%)', 'hsl(210 100% 60%)')};
+      }
+
+      .widget.up-to-date {
+        color: ${cssManager.bdTheme('hsl(142 70% 35%)', 'hsl(142 70% 50%)')};
+      }
+
+      .widget.updates-available {
+        color: ${cssManager.bdTheme('hsl(38 92% 45%)', 'hsl(38 92% 55%)')};
+      }
+
+      .widget.error {
+        color: ${cssManager.bdTheme('hsl(0 70% 50%)', 'hsl(0 70% 60%)')};
+      }
+
+      @keyframes spin {
+        from { transform: rotate(0deg); }
+        to { transform: rotate(360deg); }
+      }
+
+      .spinning {
+        animation: spin 1s linear infinite;
+      }
+
+      .spacer {
+        flex: 1;
+      }
+    `,
+  ];
+
+  public render(): TemplateResult {
+    return html`
+      <div class="bottom-bar">
+        <!-- Script Runner Widget -->
+        <div
+          class="widget"
+          @click=${this.handleScriptClick}
+          title="Run script"
+        >
+          <dees-icon
+            .icon=${'lucide:play'}
+            iconSize="12"
+          ></dees-icon>
+          <span>Scripts</span>
+        </div>
+
+        <div class="widget-separator"></div>
+
+        <!-- Package Checker Widget -->
+        <div
+          class="widget ${this.getPackageStatusClass()}"
+          @click=${this.handlePackageClick}
+          title="${this.getPackageTooltip()}"
+        >
+          <dees-icon
+            .icon=${this.getPackageIcon()}
+            iconSize="12"
+            class="${this.isCheckingPackages ? 'spinning' : ''}"
+          ></dees-icon>
+          <span>${this.getPackageStatusText()}</span>
+        </div>
+
+        <div class="spacer"></div>
+
+        <!-- Future widgets can be added here -->
+      </div>
+    `;
+  }
+
+  public async connectedCallback() {
+    await super.connectedCallback();
+    // Listen for process-complete events to refresh after package updates
+    window.addEventListener('process-complete', this.handleProcessComplete as EventListener);
+  }
+
+  public async disconnectedCallback() {
+    await super.disconnectedCallback();
+    window.removeEventListener('process-complete', this.handleProcessComplete as EventListener);
+  }
+
+  async firstUpdated() {
+    await this.loadScripts();
+    await this.checkPackages();
+  }
+
+  async updated(changedProperties: Map<string, any>) {
+    if (changedProperties.has('executionEnvironment') && this.executionEnvironment) {
+      await this.loadScripts();
+      await this.checkPackages();
+    }
+  }
+
+  // ========== Script Runner ==========
+
+  private async loadScripts(): Promise<void> {
+    if (!this.executionEnvironment) return;
+
+    try {
+      const packageJsonExists = await this.executionEnvironment.exists('/package.json');
+      if (!packageJsonExists) {
+        this.scripts = {};
+        return;
+      }
+
+      const content = await this.executionEnvironment.readFile('/package.json');
+      const packageJson = JSON.parse(content);
+      this.scripts = packageJson.scripts || {};
+    } catch (error) {
+      console.warn('Failed to load scripts from package.json:', error);
+      this.scripts = {};
+    }
+  }
+
+  private async handleScriptClick(e: MouseEvent): Promise<void> {
+    e.stopPropagation();
+
+    const scriptNames = Object.keys(this.scripts);
+    if (scriptNames.length === 0) {
+      return;
+    }
+
+    const menuItems = scriptNames.map(name => ({
+      name: name,
+      iconName: 'lucide:terminal' as const,
+      action: async () => {
+        await this.runScript(name);
+      },
+    }));
+
+    await DeesContextmenu.openContextMenuWithOptions(e, menuItems);
+  }
+
+  private async runScript(scriptName: string): Promise<void> {
+    if (!this.executionEnvironment) return;
+
+    // Emit run-process event for the workspace to create a terminal tab
+    const detail: IRunProcessEventDetail = {
+      type: 'script',
+      label: scriptName,
+      command: 'pnpm',
+      args: ['run', scriptName],
+      metadata: { scriptName },
+    };
+
+    this.dispatchEvent(new CustomEvent('run-process', {
+      bubbles: true,
+      composed: true,
+      detail,
+    }));
+  }
+
+  // ========== Package Checker ==========
+
+  private async checkPackages(): Promise<void> {
+    if (!this.executionEnvironment) {
+      this.packageStatus = 'idle';
+      return;
+    }
+
+    try {
+      const packageJsonExists = await this.executionEnvironment.exists('/package.json');
+      if (!packageJsonExists) {
+        this.packageStatus = 'idle';
+        return;
+      }
+
+      this.packageStatus = 'checking';
+      this.isCheckingPackages = true;
+
+      // Run pnpm outdated --json with timeout
+      const process = await this.executionEnvironment.spawn('pnpm', ['outdated', '--json']);
+
+      let output = '';
+
+      // Collect output asynchronously - don't await, stream may not close if no output
+      const outputReader = process.output.getReader();
+      const readOutput = async () => {
+        try {
+          while (true) {
+            const { done, value } = await outputReader.read();
+            if (done) break;
+            output += value;
+          }
+        } catch {
+          // Ignore stream errors
+        }
+      };
+      // Start reading but don't await - we'll use whatever we have when process exits
+      readOutput();
+
+      // Wait for process exit with timeout (10 seconds)
+      const exitCode = await Promise.race([
+        process.exit,
+        new Promise<number>((resolve) => setTimeout(() => resolve(-1), 10000)),
+      ]);
+
+      // Cancel reader when done
+      try {
+        await outputReader.cancel();
+      } catch {
+        // Ignore cancel errors
+      }
+
+      // Handle timeout
+      if (exitCode === -1) {
+        console.warn('Package check timed out');
+        this.packageStatus = 'error';
+        return;
+      }
+
+      // pnpm outdated returns exit code 1 if there are outdated packages
+      if (exitCode === 0) {
+        // No outdated packages
+        this.packageStatus = 'up-to-date';
+        this.outdatedPackages = [];
+      } else {
+        // Parse outdated packages
+        try {
+          const outdatedData = JSON.parse(output);
+          this.outdatedPackages = this.parseOutdatedPackages(outdatedData);
+          this.packageStatus = this.outdatedPackages.length > 0 ? 'updates-available' : 'up-to-date';
+        } catch {
+          // If parsing fails but exit code is 1, assume there are updates
+          this.packageStatus = 'updates-available';
+          this.outdatedPackages = [];
+        }
+      }
+    } catch (error) {
+      console.warn('Failed to check for package updates:', error);
+      this.packageStatus = 'error';
+    } finally {
+      this.isCheckingPackages = false;
+    }
+  }
+
+  private parseOutdatedPackages(data: any): IOutdatedPackage[] {
+    const packages: IOutdatedPackage[] = [];
+
+    // pnpm outdated --json returns an object with package names as keys
+    if (typeof data === 'object' && data !== null) {
+      for (const [name, info] of Object.entries(data)) {
+        const pkgInfo = info as any;
+        packages.push({
+          name,
+          current: pkgInfo.current || 'unknown',
+          wanted: pkgInfo.wanted || pkgInfo.current || 'unknown',
+          latest: pkgInfo.latest || pkgInfo.wanted || 'unknown',
+          type: pkgInfo.dependencyType === 'devDependencies' ? 'devDependencies' : 'dependencies',
+        });
+      }
+    }
+
+    return packages;
+  }
+
+  private async handlePackageClick(e: MouseEvent): Promise<void> {
+    e.stopPropagation();
+
+    const menuItems: Parameters<typeof DeesContextmenu.openContextMenuWithOptions>[1] = [];
+
+    // Refresh option - show output in terminal
+    menuItems.push({
+      name: this.isCheckingPackages ? 'Checking...' : 'Check for updates',
+      iconName: 'lucide:refreshCw',
+      action: async () => {
+        if (this.isCheckingPackages) return;
+
+        // Create terminal tab to show pnpm outdated output
+        const detail: IRunProcessEventDetail = {
+          type: 'package-update',
+          label: 'check packages',
+          command: 'pnpm',
+          args: ['outdated'],
+        };
+
+        this.dispatchEvent(new CustomEvent('run-process', {
+          bubbles: true,
+          composed: true,
+          detail,
+        }));
+
+        // Also refresh the widget status silently after a delay
+        setTimeout(() => this.checkPackages(), 3000);
+      },
+    });
+
+    if (this.outdatedPackages.length > 0) {
+      menuItems.push({ divider: true });
+
+      // Show outdated packages (max 10)
+      const displayPackages = this.outdatedPackages.slice(0, 10);
+      for (const pkg of displayPackages) {
+        menuItems.push({
+          name: `${pkg.name}: ${pkg.current} → ${pkg.latest}`,
+          iconName: 'lucide:package',
+          action: async () => {
+            // Update single package
+            await this.updatePackage(pkg.name);
+          },
+        });
+      }
+
+      if (this.outdatedPackages.length > 10) {
+        menuItems.push({
+          name: `... and ${this.outdatedPackages.length - 10} more`,
+          iconName: 'lucide:moreHorizontal',
+          action: async () => {},
+        });
+      }
+
+      menuItems.push({ divider: true });
+
+      menuItems.push({
+        name: 'Update all packages',
+        iconName: 'lucide:arrowUpCircle',
+        action: async () => {
+          await this.updateAllPackages();
+        },
+      });
+    }
+
+    await DeesContextmenu.openContextMenuWithOptions(e, menuItems);
+  }
+
+  private async updatePackage(packageName: string): Promise<void> {
+    if (!this.executionEnvironment) return;
+
+    // Mark that we have a pending update - will trigger refresh when complete
+    this.pendingPackageUpdate = true;
+
+    // Emit run-process event for the workspace to create a terminal tab
+    const detail: IRunProcessEventDetail = {
+      type: 'package-update',
+      label: `update ${packageName}`,
+      command: 'pnpm',
+      args: ['update', '--latest', packageName],
+      metadata: { packageName },
+    };
+
+    this.dispatchEvent(new CustomEvent('run-process', {
+      bubbles: true,
+      composed: true,
+      detail,
+    }));
+  }
+
+  private async updateAllPackages(): Promise<void> {
+    if (!this.executionEnvironment) return;
+
+    // Mark that we have a pending update - will trigger refresh when complete
+    this.pendingPackageUpdate = true;
+
+    // Emit run-process event for the workspace to create a terminal tab
+    const detail: IRunProcessEventDetail = {
+      type: 'package-update',
+      label: 'update all',
+      command: 'pnpm',
+      args: ['update', '--latest'],
+    };
+
+    this.dispatchEvent(new CustomEvent('run-process', {
+      bubbles: true,
+      composed: true,
+      detail,
+    }));
+  }
+
+  // ========== Helper Methods ==========
+
+  private getPackageStatusClass(): string {
+    if (this.isCheckingPackages) return '';
+    return this.packageStatus;
+  }
+
+  private getPackageIcon(): string {
+    if (this.isCheckingPackages) return 'lucide:loader2';
+
+    switch (this.packageStatus) {
+      case 'up-to-date':
+        return 'lucide:checkCircle';
+      case 'updates-available':
+        return 'lucide:alertCircle';
+      case 'error':
+        return 'lucide:xCircle';
+      default:
+        return 'lucide:package';
+    }
+  }
+
+  private getPackageStatusText(): string {
+    if (this.isCheckingPackages) return 'Checking...';
+
+    switch (this.packageStatus) {
+      case 'up-to-date':
+        return 'Up to date';
+      case 'updates-available':
+        return `${this.outdatedPackages.length} update${this.outdatedPackages.length !== 1 ? 's' : ''}`;
+      case 'error':
+        return 'Check failed';
+      default:
+        return 'Packages';
+    }
+  }
+
+  private getPackageTooltip(): string {
+    if (this.isCheckingPackages) return 'Checking for package updates...';
+
+    switch (this.packageStatus) {
+      case 'up-to-date':
+        return 'All packages are up to date';
+      case 'updates-available':
+        return `${this.outdatedPackages.length} package update${this.outdatedPackages.length !== 1 ? 's' : ''} available`;
+      case 'error':
+        return 'Failed to check for updates. Click to retry.';
+      default:
+        return 'Click to check for package updates';
+    }
+  }
+
+  // ========== Public Methods ==========
+
+  /**
+   * Manually trigger a package check
+   */
+  public async refreshPackageStatus(): Promise<void> {
+    await this.checkPackages();
+  }
+
+  /**
+   * Manually reload scripts from package.json
+   */
+  public async refreshScripts(): Promise<void> {
+    await this.loadScripts();
+  }
+}

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

@@ -0,0 +1 @@
+export * from './dees-workspace-bottombar.js';

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

@@ -0,0 +1,359 @@
+import {
+  DeesElement,
+  property,
+  html,
+  customElement,
+  type TemplateResult,
+  css,
+  cssManager,
+} from '@design.estate/dees-element';
+import * as domtools from '@design.estate/dees-domtools';
+import { MONACO_VERSION } from '../dees-workspace-monaco/version.js';
+import { themeDefaultStyles } from '../../00theme.js';
+import '../../00group-button/dees-button/dees-button.js';
+
+import type * as monaco from 'monaco-editor';
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'dees-workspace-diff-editor': DeesWorkspaceDiffEditor;
+  }
+}
+
+@customElement('dees-workspace-diff-editor')
+export class DeesWorkspaceDiffEditor extends DeesElement {
+  // DEMO
+  public static demo = () => html`
+    <dees-workspace-diff-editor
+      .originalContent=${'function hello() {\n  console.log("Hello");\n}'}
+      .modifiedContent=${'function hello() {\n  console.log("Hello World!");\n  return true;\n}'}
+      .language=${'typescript'}
+      .filePath=${'/demo/example.ts'}
+    ></dees-workspace-diff-editor>
+  `;
+
+  // INSTANCE
+  public diffEditorDeferred = domtools.plugins.smartpromise.defer<monaco.editor.IStandaloneDiffEditor>();
+
+  @property({ type: String })
+  accessor originalContent: string = '';
+
+  @property({ type: String })
+  accessor modifiedContent: string = '';
+
+  @property({ type: String })
+  accessor originalLabel: string = 'Disk Version';
+
+  @property({ type: String })
+  accessor modifiedLabel: string = 'Local Version';
+
+  @property({ type: String })
+  accessor language: string = 'typescript';
+
+  @property({ type: String })
+  accessor filePath: string = '';
+
+  private diffEditor: monaco.editor.IStandaloneDiffEditor | null = null;
+  private monacoThemeSubscription: domtools.plugins.smartrx.rxjs.Subscription | null = null;
+  private originalModel: monaco.editor.ITextModel | null = null;
+  private modifiedModel: monaco.editor.ITextModel | null = null;
+
+  constructor() {
+    super();
+    domtools.DomTools.setupDomTools();
+  }
+
+  public static styles = [
+    themeDefaultStyles,
+    cssManager.defaultStyles,
+    css`
+      :host {
+        display: block;
+        position: absolute;
+        top: 0;
+        left: 0;
+        right: 0;
+        bottom: 0;
+      }
+
+      * {
+        box-sizing: border-box;
+      }
+
+      .diff-wrapper {
+        display: flex;
+        flex-direction: column;
+        height: 100%;
+        width: 100%;
+      }
+
+      .diff-toolbar {
+        height: 48px;
+        display: flex;
+        align-items: center;
+        justify-content: space-between;
+        padding: 0 16px;
+        background: ${cssManager.bdTheme('hsl(0 0% 96%)', 'hsl(0 0% 12%)')};
+        border-bottom: 1px solid ${cssManager.bdTheme('hsl(0 0% 85%)', 'hsl(0 0% 20%)')};
+        flex-shrink: 0;
+      }
+
+      .diff-info {
+        display: flex;
+        align-items: center;
+        gap: 12px;
+        font-size: 14px;
+        color: ${cssManager.bdTheme('hsl(0 0% 30%)', 'hsl(0 0% 80%)')};
+      }
+
+      .diff-filename {
+        font-weight: 600;
+        color: ${cssManager.bdTheme('hsl(0 0% 20%)', 'hsl(0 0% 90%)')};
+      }
+
+      .diff-labels {
+        font-size: 12px;
+        color: ${cssManager.bdTheme('hsl(0 0% 50%)', 'hsl(0 0% 60%)')};
+      }
+
+      .diff-actions {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+      }
+
+      .diff-container {
+        flex: 1;
+        min-height: 0;
+        width: 100%;
+      }
+
+      .nav-buttons {
+        display: flex;
+        gap: 4px;
+      }
+
+      .action-buttons {
+        display: flex;
+        gap: 8px;
+        margin-left: 16px;
+      }
+    `,
+  ];
+
+  public render(): TemplateResult {
+    const fileName = this.filePath.split('/').pop() || 'file';
+
+    return html`
+      <div class="diff-wrapper">
+        <div class="diff-toolbar">
+          <div class="diff-info">
+            <span class="diff-filename">${fileName}</span>
+            <span class="diff-labels">${this.originalLabel} ↔ ${this.modifiedLabel}</span>
+          </div>
+          <div class="diff-actions">
+            <div class="nav-buttons">
+              <dees-button
+                type="outline"
+                @click=${this.goToPreviousDiff}
+              >Previous</dees-button>
+              <dees-button
+                type="outline"
+                @click=${this.goToNextDiff}
+              >Next</dees-button>
+            </div>
+            <div class="action-buttons">
+              <dees-button
+                type="highlighted"
+                @click=${this.acceptLocal}
+              >Use Local</dees-button>
+              <dees-button
+                type="outline"
+                @click=${this.acceptDisk}
+              >Use Disk</dees-button>
+              <dees-button
+                type="outline"
+                @click=${this.close}
+              >Close</dees-button>
+            </div>
+          </div>
+        </div>
+        <div class="diff-container"></div>
+      </div>
+    `;
+  }
+
+  public async firstUpdated(): Promise<void> {
+    await super.firstUpdated(new Map());
+    await this.initDiffEditor();
+  }
+
+  private async initDiffEditor(): Promise<void> {
+    const container = this.shadowRoot?.querySelector('.diff-container') as HTMLElement;
+    if (!container) return;
+
+    const monacoCdnBase = `https://cdn.jsdelivr.net/npm/monaco-editor@${MONACO_VERSION}`;
+
+    // Wait for Monaco to be loaded (should already be loaded by dees-workspace-monaco)
+    let monacoInstance = (window as any).monaco as typeof monaco;
+
+    if (!monacoInstance) {
+      // Monaco not loaded yet, wait for it
+      await new Promise<void>((resolve) => {
+        const checkMonaco = setInterval(() => {
+          if ((window as any).monaco) {
+            clearInterval(checkMonaco);
+            resolve();
+          }
+        }, 100);
+      });
+      monacoInstance = (window as any).monaco as typeof monaco;
+    }
+
+    // Get current theme from domtools
+    const domtoolsInstance = await this.domtoolsPromise;
+    const isBright = domtoolsInstance.themeManager.goBrightBoolean;
+    const initialTheme = isBright ? 'vs' : 'vs-dark';
+
+    // Create unique URIs for models
+    const timestamp = Date.now();
+    const originalUri = monacoInstance.Uri.parse(`diff://original/${timestamp}${this.filePath}`);
+    const modifiedUri = monacoInstance.Uri.parse(`diff://modified/${timestamp}${this.filePath}`);
+
+    // Create models
+    this.originalModel = monacoInstance.editor.createModel(
+      this.originalContent,
+      this.language,
+      originalUri
+    );
+    this.modifiedModel = monacoInstance.editor.createModel(
+      this.modifiedContent,
+      this.language,
+      modifiedUri
+    );
+
+    // Create diff editor
+    this.diffEditor = monacoInstance.editor.createDiffEditor(container, {
+      automaticLayout: true,
+      readOnly: false, // Allow editing the modified (local) side
+      originalEditable: false, // Disk version is read-only
+      renderSideBySide: true,
+      ignoreTrimWhitespace: false,
+      fontSize: 14,
+      minimap: {
+        enabled: false,
+      },
+    });
+
+    // Set the theme
+    monacoInstance.editor.setTheme(initialTheme);
+
+    this.diffEditor.setModel({
+      original: this.originalModel,
+      modified: this.modifiedModel,
+    });
+
+    // Subscribe to theme changes
+    this.monacoThemeSubscription = domtoolsInstance.themeManager.themeObservable.subscribe(
+      (goBright: boolean) => {
+        const newTheme = goBright ? 'vs' : 'vs-dark';
+        monacoInstance.editor.setTheme(newTheme);
+      }
+    );
+
+    // Inject Monaco CSS if not already present
+    const cssId = 'monaco-diff-editor-css';
+    if (!this.shadowRoot?.getElementById(cssId)) {
+      const cssResponse = await fetch(`${monacoCdnBase}/min/vs/editor/editor.main.css`);
+      const cssText = await cssResponse.text();
+      const styleElement = document.createElement('style');
+      styleElement.id = cssId;
+      styleElement.textContent = cssText;
+      this.shadowRoot?.append(styleElement);
+    }
+
+    // Navigate to first diff after a short delay
+    setTimeout(() => {
+      try {
+        this.diffEditor?.revealFirstDiff();
+      } catch {
+        // Ignore if no diffs
+      }
+    }, 100);
+
+    this.diffEditorDeferred.resolve(this.diffEditor);
+  }
+
+  public goToNextDiff(): void {
+    try {
+      this.diffEditor?.goToDiff('next');
+    } catch {
+      // Ignore if no more diffs
+    }
+  }
+
+  public goToPreviousDiff(): void {
+    try {
+      this.diffEditor?.goToDiff('previous');
+    } catch {
+      // Ignore if no more diffs
+    }
+  }
+
+  public acceptLocal(): void {
+    // User wants to keep local version (potentially with edits made in diff view)
+    const modifiedContent = this.diffEditor?.getModifiedEditor().getValue() || this.modifiedContent;
+    this.dispatchEvent(
+      new CustomEvent('diff-resolved', {
+        detail: { action: 'use-local', content: modifiedContent },
+        bubbles: true,
+        composed: true,
+      })
+    );
+  }
+
+  public acceptDisk(): void {
+    // User wants disk version
+    this.dispatchEvent(
+      new CustomEvent('diff-resolved', {
+        detail: { action: 'use-disk', content: this.originalContent },
+        bubbles: true,
+        composed: true,
+      })
+    );
+  }
+
+  public close(): void {
+    this.dispatchEvent(
+      new CustomEvent('diff-closed', {
+        bubbles: true,
+        composed: true,
+      })
+    );
+  }
+
+  public async disconnectedCallback(): Promise<void> {
+    await super.disconnectedCallback();
+
+    if (this.monacoThemeSubscription) {
+      this.monacoThemeSubscription.unsubscribe();
+      this.monacoThemeSubscription = null;
+    }
+
+    // Dispose models
+    if (this.originalModel) {
+      this.originalModel.dispose();
+      this.originalModel = null;
+    }
+    if (this.modifiedModel) {
+      this.modifiedModel.dispose();
+      this.modifiedModel = null;
+    }
+
+    // Dispose editor
+    if (this.diffEditor) {
+      this.diffEditor.dispose();
+      this.diffEditor = null;
+    }
+  }
+}

ts_web/elements/00group-workspace/dees-workspace-diff-editor/index.ts

@@ -0,0 +1 @@
+export * from './dees-workspace-diff-editor.js';

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

@@ -242,4 +242,53 @@ export class DeesWorkspaceMonaco extends DeesElement {
       this.monacoThemeSubscription = null;
     }
   }
+
+  /**
+   * Update content from external source with optional cursor preservation.
+   * Use this when the file content changes externally (e.g., file changed on disk).
+   * @param newContent The new content to set
+   * @param preserveCursor Whether to preserve cursor/scroll position (default: true)
+   */
+  public async setContentExternal(
+    newContent: string,
+    preserveCursor: boolean = true
+  ): Promise<void> {
+    const editor = await this.editorDeferred.promise;
+    const currentValue = editor.getValue();
+
+    if (currentValue === newContent) return;
+
+    // Save cursor state if preserving
+    const position = preserveCursor ? editor.getPosition() : null;
+    const selections = preserveCursor ? editor.getSelections() : null;
+    const scrollTop = preserveCursor ? editor.getScrollTop() : 0;
+    const scrollLeft = preserveCursor ? editor.getScrollLeft() : 0;
+
+    // Update content
+    this.isUpdatingFromExternal = true;
+    editor.setValue(newContent);
+    this.isUpdatingFromExternal = false;
+
+    // Restore cursor state if preserving
+    if (preserveCursor) {
+      if (position) {
+        // Clamp position to valid range
+        const model = editor.getModel();
+        const lineCount = model?.getLineCount() || 1;
+        const clampedLine = Math.min(position.lineNumber, lineCount);
+        const lineLength = model?.getLineMaxColumn(clampedLine) || 1;
+        const clampedColumn = Math.min(position.column, lineLength);
+        editor.setPosition({ lineNumber: clampedLine, column: clampedColumn });
+      }
+      if (selections && selections.length > 0) {
+        // Selections may be invalid after content change, wrap in try-catch
+        try {
+          editor.setSelections(selections);
+        } catch {
+          // Ignore invalid selections
+        }
+      }
+      editor.setScrollPosition({ scrollTop, scrollLeft });
+    }
+  }
 }

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();

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

@@ -1 +1,3 @@
 export * from './dees-workspace-terminal.js';
+export * from './interfaces.js';
+export * from './terminal-tab-manager.js';

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

@@ -0,0 +1,126 @@
+import type { Terminal } from 'xterm';
+import type { FitAddon } from 'xterm-addon-fit';
+import type { IProcessHandle } from '../../00group-runtime/index.js';
+
+/**
+ * Type of terminal tab based on its source/purpose
+ */
+export type TTerminalTabType =
+  | 'shell'           // Default interactive shell (jsh)
+  | 'script'          // Script from package.json
+  | 'package-update'  // Package update process
+  | 'custom';         // External process from API
+
+/**
+ * Represents a single terminal tab instance
+ */
+export interface ITerminalTab {
+  /** Unique identifier for the tab */
+  id: string;
+
+  /** Display label for the tab */
+  label: string;
+
+  /** Icon name (lucide icon) */
+  iconName: string;
+
+  /** Type of terminal process */
+  type: TTerminalTabType;
+
+  /** Whether the tab can be closed */
+  closeable: boolean;
+
+  /** xterm.js Terminal instance */
+  terminal: Terminal;
+
+  /** FitAddon for this terminal */
+  fitAddon: FitAddon;
+
+  /** Process handle (if process is running) */
+  process: IProcessHandle | null;
+
+  /** Process input writer (for interactive terminals) */
+  inputWriter: WritableStreamDefaultWriter<string> | null;
+
+  /** Whether the process has exited */
+  exited: boolean;
+
+  /** Exit code (if process has exited) */
+  exitCode: number | null;
+
+  /** Timestamp when tab was created */
+  createdAt: number;
+
+  /** Optional metadata for script tabs */
+  metadata?: {
+    scriptName?: string;
+    packageName?: string;
+    command?: string;
+  };
+}
+
+/**
+ * Options for creating a new terminal tab
+ */
+export interface ICreateTerminalTabOptions {
+  /** Display label (auto-generated if not provided) */
+  label?: string;
+
+  /** Tab type */
+  type: TTerminalTabType;
+
+  /** Icon name override */
+  iconName?: string;
+
+  /** Whether the tab can be closed (default: true for non-shell) */
+  closeable?: boolean;
+
+  /** Command to spawn (default: 'jsh' for shell type) */
+  command?: string;
+
+  /** Command arguments */
+  args?: string[];
+
+  /** Additional metadata */
+  metadata?: ITerminalTab['metadata'];
+
+  /** Whether to switch to this tab after creation (default: true) */
+  switchToTab?: boolean;
+}
+
+/**
+ * Event detail for terminal tab events
+ */
+export interface ITerminalTabEventDetail {
+  tabId: string;
+}
+
+/**
+ * Event detail for tab switch events
+ */
+export interface ITerminalTabSwitchEventDetail {
+  tabId: string;
+  previousTabId: string | null;
+}
+
+/**
+ * Event detail for process completion
+ */
+export interface ITerminalProcessCompleteEventDetail {
+  tabId: string;
+  exitCode: number;
+}
+
+/**
+ * Event detail for run-process events from bottom bar
+ */
+export interface IRunProcessEventDetail {
+  type: TTerminalTabType;
+  label: string;
+  command: string;
+  args?: string[];
+  metadata?: {
+    scriptName?: string;
+    packageName?: string;
+  };
+}

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

@@ -0,0 +1,259 @@
+import type { Terminal, ITerminalOptions } from 'xterm';
+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
+ */
+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
+   */
+  private generateTabId(): string {
+    this.tabCounter++;
+    return `terminal-${this.tabCounter}-${Date.now()}`;
+  }
+
+  /**
+   * Get default label for tab type
+   */
+  private getDefaultLabel(type: TTerminalTabType, metadata?: ITerminalTab['metadata']): string {
+    switch (type) {
+      case 'shell':
+        return 'bash';
+      case 'script':
+        return metadata?.scriptName || 'script';
+      case 'package-update':
+        return metadata?.packageName ? `update ${metadata.packageName}` : 'update';
+      case 'custom':
+        return metadata?.command || 'process';
+      default:
+        return 'terminal';
+    }
+  }
+
+  /**
+   * Get default icon for tab type
+   */
+  private getDefaultIcon(type: TTerminalTabType): string {
+    switch (type) {
+      case 'shell':
+        return 'lucide:terminal';
+      case 'script':
+        return 'lucide:play';
+      case 'package-update':
+        return 'lucide:packageCheck';
+      case 'custom':
+        return 'lucide:code';
+      default:
+        return 'lucide:terminal';
+    }
+  }
+
+  /**
+   * Get terminal theme configuration
+   */
+  private getTerminalTheme(isBright: boolean): any {
+    if (isBright) {
+      return {
+        background: '#ffffff',
+        foreground: '#333333',
+        cursor: '#333333',
+        cursorAccent: '#ffffff',
+        selection: 'rgba(0, 0, 0, 0.2)',
+        black: '#000000',
+        red: '#cd3131',
+        green: '#00bc00',
+        yellow: '#949800',
+        blue: '#0451a5',
+        magenta: '#bc05bc',
+        cyan: '#0598bc',
+        white: '#555555',
+        brightBlack: '#666666',
+        brightRed: '#cd3131',
+        brightGreen: '#14ce14',
+        brightYellow: '#b5ba00',
+        brightBlue: '#0451a5',
+        brightMagenta: '#bc05bc',
+        brightCyan: '#0598bc',
+        brightWhite: '#a5a5a5',
+      };
+    } else {
+      return {
+        background: '#000000',
+        foreground: '#ffffff',
+        cursor: '#ffffff',
+        cursorAccent: '#000000',
+        selection: 'rgba(255, 255, 255, 0.2)',
+      };
+    }
+  }
+
+  /**
+   * 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 using CDN-loaded module
+    const terminal = new this.xtermBundle.Terminal({
+      convertEol: true,
+      cursorBlink: true,
+      theme: this.getTerminalTheme(isBright),
+      fontFamily: 'Menlo, Monaco, "Courier New", monospace',
+      fontSize: 13,
+      lineHeight: 1.2,
+    });
+
+    // Create FitAddon using CDN-loaded module
+    const fitAddon = new this.xtermFitAddonBundle.FitAddon();
+    terminal.loadAddon(fitAddon);
+
+    const tab: ITerminalTab = {
+      id,
+      label: options.label || this.getDefaultLabel(type, options.metadata),
+      iconName: options.iconName || this.getDefaultIcon(type),
+      type,
+      closeable: options.closeable ?? (type !== 'shell'),
+      terminal,
+      fitAddon,
+      process: null,
+      inputWriter: null,
+      exited: false,
+      exitCode: null,
+      createdAt: Date.now(),
+      metadata: options.metadata,
+    };
+
+    this.tabs.set(id, tab);
+    return tab;
+  }
+
+  /**
+   * Get tab by ID
+   */
+  getTab(id: string): ITerminalTab | undefined {
+    return this.tabs.get(id);
+  }
+
+  /**
+   * Get all tabs as array (ordered by creation time)
+   */
+  getAllTabs(): ITerminalTab[] {
+    return Array.from(this.tabs.values()).sort((a, b) => a.createdAt - b.createdAt);
+  }
+
+  /**
+   * Get the number of tabs
+   */
+  getTabCount(): number {
+    return this.tabs.size;
+  }
+
+  /**
+   * Check if tab exists
+   */
+  hasTab(id: string): boolean {
+    return this.tabs.has(id);
+  }
+
+  /**
+   * Close and cleanup a tab
+   */
+  closeTab(id: string): boolean {
+    const tab = this.tabs.get(id);
+    if (!tab) return false;
+
+    // Kill process if still running
+    if (tab.process && !tab.exited) {
+      try {
+        tab.process.kill();
+      } catch (e) {
+        console.warn('Failed to kill process:', e);
+      }
+    }
+
+    // Dispose terminal
+    try {
+      tab.terminal.dispose();
+    } catch (e) {
+      console.warn('Failed to dispose terminal:', e);
+    }
+
+    this.tabs.delete(id);
+    return true;
+  }
+
+  /**
+   * Rename a tab
+   */
+  renameTab(id: string, newLabel: string): boolean {
+    const tab = this.tabs.get(id);
+    if (!tab) return false;
+
+    tab.label = newLabel;
+    return true;
+  }
+
+  /**
+   * Update tab process state to exited
+   */
+  markTabExited(id: string, exitCode: number): void {
+    const tab = this.tabs.get(id);
+    if (!tab) return;
+
+    tab.exited = true;
+    tab.exitCode = exitCode;
+  }
+
+  /**
+   * Set process for a tab
+   */
+  setTabProcess(id: string, process: ITerminalTab['process'], inputWriter: ITerminalTab['inputWriter']): void {
+    const tab = this.tabs.get(id);
+    if (!tab) return;
+
+    tab.process = process;
+    tab.inputWriter = inputWriter;
+  }
+
+  /**
+   * Update theme for all terminals
+   */
+  updateAllThemes(isBright: boolean): void {
+    const theme = this.getTerminalTheme(isBright);
+    for (const tab of this.tabs.values()) {
+      tab.terminal.options.theme = theme;
+    }
+  }
+
+  /**
+   * Dispose all tabs and cleanup
+   */
+  disposeAll(): void {
+    for (const [id] of this.tabs) {
+      this.closeTab(id);
+    }
+    this.tabs.clear();
+  }
+}

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

@@ -17,12 +17,18 @@ import '../dees-workspace-monaco/dees-workspace-monaco.js';
 import '../dees-workspace-filetree/dees-workspace-filetree.js';
 import { DeesWorkspaceFiletree } from '../dees-workspace-filetree/dees-workspace-filetree.js';
 import '../dees-workspace-terminal/dees-workspace-terminal.js';
+import { DeesWorkspaceTerminal } from '../dees-workspace-terminal/dees-workspace-terminal.js';
+import type { IRunProcessEventDetail } from '../dees-workspace-terminal/interfaces.js';
 import '../dees-workspace-terminal-preview/dees-workspace-terminal-preview.js';
+import '../dees-workspace-bottombar/dees-workspace-bottombar.js';
 import '../../dees-icon/dees-icon.js';
 import { DeesWorkspaceMonaco } from '../dees-workspace-monaco/dees-workspace-monaco.js';
 import { TypeScriptIntelliSenseManager } from './typescript-intellisense.js';
 import { DeesContextmenu } from '../../dees-contextmenu/dees-contextmenu.js';
 import '@design.estate/dees-wcctools/demotools';
+import '../../dees-actionbar/dees-actionbar.js';
+import type { DeesActionbar } from '../../dees-actionbar/dees-actionbar.js';
+import '../dees-workspace-diff-editor/dees-workspace-diff-editor.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -62,6 +68,7 @@ export class DeesWorkspace extends DeesElement {
                   '@push.rocks/smartpromise': '^4.2.3',
                 },
                 devDependencies: {
+                  '@types/node': '^22.0.0',
                   typescript: '^5.0.0',
                 },
               },
@@ -250,6 +257,11 @@ testSmartPromise();
   private nodeModulesDebounceTimeout: ReturnType<typeof setTimeout> | null = null;
   private intelliSenseDebounceTimeout: ReturnType<typeof setTimeout> | null = null;
 
+  // Open file watchers for external change detection
+  private openFileWatchers: Map<string, IFileWatcher> = new Map();
+  private fileChangeDebounce: Map<string, ReturnType<typeof setTimeout>> = new Map();
+  private actionbarElement: DeesActionbar | null = null;
+
   // Auto-save functionality
   @state()
   accessor autoSave: boolean = false;
@@ -262,6 +274,31 @@ testSmartPromise();
   @state()
   accessor initOutput: string[] = [];
 
+  // Resize state
+  @state()
+  accessor currentFileTreeWidth: number = 250;
+
+  @state()
+  accessor currentTerminalHeight: number = 200;
+
+  @state()
+  accessor isDraggingFileTree: boolean = false;
+
+  @state()
+  accessor isDraggingTerminal: boolean = false;
+
+  // Diff view state
+  @state()
+  accessor showDiffView: boolean = false;
+
+  @state()
+  accessor diffViewConfig: {
+    filePath: string;
+    originalContent: string;
+    modifiedContent: string;
+    language: string;
+  } | null = null;
+
   // Keyboard shortcut handler (bound for proper cleanup)
   private keydownHandler = (e: KeyboardEvent) => {
     // Cmd+S (Mac) or Ctrl+S (Windows/Linux) - Save
@@ -277,6 +314,71 @@ testSmartPromise();
     }
   };
 
+  // ========== Filetree Resize Handlers ==========
+  private handleFileTreeMouseDown = (e: MouseEvent) => {
+    e.preventDefault();
+    this.isDraggingFileTree = true;
+    document.addEventListener('mousemove', this.handleFileTreeMouseMove);
+    document.addEventListener('mouseup', this.handleFileTreeMouseUp);
+  };
+
+  private handleFileTreeMouseMove = (e: MouseEvent) => {
+    if (!this.isDraggingFileTree) return;
+
+    const containerRect = this.getBoundingClientRect();
+    const mouseX = e.clientX - containerRect.left;
+
+    // Clamp to min/max (150px min, 50% of container max)
+    const minWidth = 150;
+    const maxWidth = containerRect.width * 0.5;
+    const newWidth = Math.max(minWidth, Math.min(maxWidth, mouseX));
+
+    this.currentFileTreeWidth = newWidth;
+  };
+
+  private handleFileTreeMouseUp = () => {
+    this.isDraggingFileTree = false;
+    document.removeEventListener('mousemove', this.handleFileTreeMouseMove);
+    document.removeEventListener('mouseup', this.handleFileTreeMouseUp);
+
+    // Notify Monaco editor of size change
+    window.dispatchEvent(new Event('resize'));
+  };
+
+  // ========== Terminal Resize Handlers ==========
+  private handleTerminalMouseDown = (e: MouseEvent) => {
+    e.preventDefault();
+    this.isDraggingTerminal = true;
+    document.addEventListener('mousemove', this.handleTerminalMouseMove);
+    document.addEventListener('mouseup', this.handleTerminalMouseUp);
+  };
+
+  private handleTerminalMouseMove = (e: MouseEvent) => {
+    if (!this.isDraggingTerminal) return;
+
+    const containerRect = this.getBoundingClientRect();
+    const mouseY = e.clientY - containerRect.top;
+
+    // Calculate terminal height from bottom
+    const terminalHeight = containerRect.height - mouseY;
+
+    // Clamp to min/max (100px min, 70% of container max)
+    const minHeight = 100;
+    const maxHeight = containerRect.height * 0.7;
+    const newHeight = Math.max(minHeight, Math.min(maxHeight, terminalHeight));
+
+    this.currentTerminalHeight = newHeight;
+  };
+
+  private handleTerminalMouseUp = () => {
+    this.isDraggingTerminal = false;
+    document.removeEventListener('mousemove', this.handleTerminalMouseMove);
+    document.removeEventListener('mouseup', this.handleTerminalMouseUp);
+
+    // Notify Monaco editor of size change
+    window.dispatchEvent(new Event('resize'));
+  };
+
   public static styles = [
     themeDefaultStyles,
     cssManager.defaultStyles,
@@ -292,68 +394,54 @@ testSmartPromise();
         font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
       }
 
-      .workspace-container {
-        display: grid;
+      .workspace-outer {
+        display: flex;
+        flex-direction: column;
         height: 100%;
         width: 100%;
       }
 
-      .workspace-container.with-filetree.with-terminal {
-        grid-template-columns: auto 1fr;
-        grid-template-rows: 1fr auto;
-        grid-template-areas:
-          "filetree editor"
-          "filetree terminal";
+      .workspace-container {
+        display: flex;
+        flex-direction: row;
+        flex: 1;
+        min-height: 0;
+        width: 100%;
       }
 
-      .workspace-container.with-filetree:not(.with-terminal) {
-        grid-template-columns: auto 1fr;
-        grid-template-rows: 1fr;
-        grid-template-areas: "filetree editor";
-      }
-
-      .workspace-container:not(.with-filetree).with-terminal {
-        grid-template-columns: 1fr;
-        grid-template-rows: 1fr auto;
-        grid-template-areas:
-          "editor"
-          "terminal";
-      }
-
-      .workspace-container:not(.with-filetree):not(.with-terminal) {
-        grid-template-columns: 1fr;
-        grid-template-rows: 1fr;
-        grid-template-areas: "editor";
+      .editor-area {
+        display: flex;
+        flex-direction: column;
+        flex: 1;
+        min-width: 0;
+        overflow: hidden;
       }
 
       .filetree-panel {
-        grid-area: filetree;
         position: relative;
-        border-right: 1px solid ${cssManager.bdTheme('hsl(0 0% 85%)', 'hsl(0 0% 15%)')};
         overflow: hidden;
-        transition: width 0.2s ease;
+        flex-shrink: 0;
       }
 
       .filetree-panel.collapsed {
         width: 0 !important;
-        border-right: none;
       }
 
       .editor-panel {
-        grid-area: editor;
         position: relative;
         display: flex;
         flex-direction: column;
         overflow: hidden;
         background: ${cssManager.bdTheme('hsl(0 0% 100%)', 'hsl(0 0% 9%)')};
+        flex: 1;
+        min-width: 200px;
       }
 
       .terminal-panel {
-        grid-area: terminal;
         position: relative;
         border-top: 1px solid ${cssManager.bdTheme('hsl(0 0% 85%)', 'hsl(0 0% 15%)')};
         overflow: hidden;
-        transition: height 0.2s ease;
+        flex-shrink: 0;
       }
 
       .terminal-panel.collapsed {
@@ -695,14 +783,96 @@ testSmartPromise();
         right: 0;
         bottom: 0;
       }
+
+      /* Resize handles */
+      .resize-handle-vertical {
+        width: 6px;
+        cursor: col-resize;
+        background: transparent;
+        transition: background 0.15s ease;
+        position: relative;
+        flex-shrink: 0;
+        z-index: 10;
+      }
+
+      .resize-handle-vertical:hover,
+      .resize-handle-vertical.dragging {
+        background: ${cssManager.bdTheme('#3b82f6', '#58a6ff')};
+      }
+
+      .resize-handle-vertical::after {
+        content: '';
+        position: absolute;
+        top: 50%;
+        left: 50%;
+        transform: translate(-50%, -50%);
+        width: 2px;
+        height: 32px;
+        background: ${cssManager.bdTheme('#9ca3af', '#6e7681')};
+        border-radius: 1px;
+        opacity: 0;
+        transition: opacity 0.15s ease;
+      }
+
+      .resize-handle-vertical:hover::after,
+      .resize-handle-vertical.dragging::after {
+        opacity: 1;
+        background: ${cssManager.bdTheme('#ffffff', '#ffffff')};
+      }
+
+      .resize-handle-horizontal {
+        height: 6px;
+        cursor: row-resize;
+        background: transparent;
+        transition: background 0.15s ease;
+        position: relative;
+        flex-shrink: 0;
+        z-index: 10;
+      }
+
+      .resize-handle-horizontal:hover,
+      .resize-handle-horizontal.dragging {
+        background: ${cssManager.bdTheme('#3b82f6', '#58a6ff')};
+      }
+
+      .resize-handle-horizontal::after {
+        content: '';
+        position: absolute;
+        top: 50%;
+        left: 50%;
+        transform: translate(-50%, -50%);
+        width: 32px;
+        height: 2px;
+        background: ${cssManager.bdTheme('#9ca3af', '#6e7681')};
+        border-radius: 1px;
+        opacity: 0;
+        transition: opacity 0.15s ease;
+      }
+
+      .resize-handle-horizontal:hover::after,
+      .resize-handle-horizontal.dragging::after {
+        opacity: 1;
+        background: ${cssManager.bdTheme('#ffffff', '#ffffff')};
+      }
+
+      /* Prevent text selection while dragging */
+      .workspace-container.dragging {
+        user-select: none;
+      }
+
+      .workspace-container.dragging .filetree-panel,
+      .workspace-container.dragging .editor-panel,
+      .workspace-container.dragging .terminal-panel {
+        pointer-events: none;
+      }
+
     `,
   ];
 
   public render(): TemplateResult {
     const containerClasses = [
       'workspace-container',
-      this.showFileTree && !this.isFileTreeCollapsed ? 'with-filetree' : '',
-      this.showTerminal ? 'with-terminal' : '',
+      (this.isDraggingFileTree || this.isDraggingTerminal) ? 'dragging' : '',
     ].filter(Boolean).join(' ');
 
     if (this.isInitializing) {
@@ -719,102 +889,139 @@ testSmartPromise();
     }
 
     return html`
-      <div class="${containerClasses}">
-        ${this.showFileTree ? html`
-          <div
-            class="filetree-panel ${this.isFileTreeCollapsed ? 'collapsed' : ''}"
-            style="width: ${this.isFileTreeCollapsed ? 0 : this.fileTreeWidth}px"
-          >
-            <dees-workspace-filetree
-              .executionEnvironment=${this.executionEnvironment}
-              .selectedPath=${this.activeFilePath}
-              @file-select=${this.handleFileSelect}
-            ></dees-workspace-filetree>
-          </div>
-        ` : ''}
+      <div class="workspace-outer">
+        <div class="${containerClasses}">
+          <!-- Filetree panel (full height) -->
+          ${this.showFileTree ? html`
+            <div
+              class="filetree-panel ${this.isFileTreeCollapsed ? 'collapsed' : ''}"
+              style="width: ${this.isFileTreeCollapsed ? 0 : this.currentFileTreeWidth}px"
+            >
+              <dees-workspace-filetree
+                .executionEnvironment=${this.executionEnvironment}
+                .selectedPath=${this.activeFilePath}
+                @file-select=${this.handleFileSelect}
+              ></dees-workspace-filetree>
+            </div>
+            ${!this.isFileTreeCollapsed ? html`
+              <div
+                class="resize-handle-vertical ${this.isDraggingFileTree ? 'dragging' : ''}"
+                @mousedown=${this.handleFileTreeMouseDown}
+              ></div>
+            ` : ''}
+          ` : ''}
 
-        <div class="editor-panel">
-          <div class="tabs-bar">
-            <div class="tabs-container">
-              ${this.openFiles.map(file => html`
-                <div
-                  class="tab ${file.path === this.activeFilePath ? 'active' : ''}"
-                  @click=${() => this.activateFile(file.path)}
-                >
-                  ${file.modified ? html`<span class="tab-modified"></span>` : ''}
-                  <span class="tab-name">${file.name}</span>
-                  <span class="tab-close" @click=${(e: Event) => this.closeFile(e, file.path)}>
-                    <dees-icon .icon=${'lucide:x'} iconSize="12"></dees-icon>
-                  </span>
+          <!-- Editor + Terminal area -->
+          <div class="editor-area">
+            <div class="editor-panel">
+              <div class="tabs-bar">
+                <div class="tabs-container">
+                  ${this.openFiles.map(file => html`
+                    <div
+                      class="tab ${file.path === this.activeFilePath ? 'active' : ''}"
+                      @click=${() => this.activateFile(file.path)}
+                    >
+                      ${file.modified ? html`<span class="tab-modified"></span>` : ''}
+                      <span class="tab-name">${file.name}</span>
+                      <span class="tab-close" @click=${(e: Event) => this.closeFile(e, file.path)}>
+                        <dees-icon .icon=${'lucide:x'} iconSize="12"></dees-icon>
+                      </span>
+                    </div>
+                  `)}
+                </div>
+                <div class="editor-menu-button" @click=${this.showEditorMenu} title="Editor options">
+                  <dees-icon .icon=${'lucide:moreVertical'} iconSize="16"></dees-icon>
                 </div>
-              `)}
-            </div>
-            <div class="editor-menu-button" @click=${this.showEditorMenu} title="Editor options">
-              <dees-icon .icon=${'lucide:moreVertical'} iconSize="16"></dees-icon>
-            </div>
-          </div>
-          <div class="editor-content">
-            ${this.openFiles.length === 0 ? html`
-              <div class="empty-state">
-                <dees-icon .icon=${'lucide:fileCode'} iconSize="48"></dees-icon>
-                <span>Select a file to edit</span>
               </div>
-            ` : html`
-              <dees-workspace-monaco
-                .filePath=${this.activeFilePath}
-                .content=${this.getActiveFileContent()}
-                .language=${this.getLanguageFromPath(this.activeFilePath)}
-                @content-change=${this.handleContentChange}
-              ></dees-workspace-monaco>
-            `}
+              <div class="editor-content">
+                ${this.showDiffView && this.diffViewConfig ? html`
+                  <dees-workspace-diff-editor
+                    .filePath=${this.diffViewConfig.filePath}
+                    .originalContent=${this.diffViewConfig.originalContent}
+                    .modifiedContent=${this.diffViewConfig.modifiedContent}
+                    .language=${this.diffViewConfig.language}
+                    @diff-resolved=${this.handleDiffResolved}
+                    @diff-closed=${() => { this.showDiffView = false; this.diffViewConfig = null; }}
+                  ></dees-workspace-diff-editor>
+                ` : this.openFiles.length === 0 ? html`
+                  <div class="empty-state">
+                    <dees-icon .icon=${'lucide:fileCode'} iconSize="48"></dees-icon>
+                    <span>Select a file to edit</span>
+                  </div>
+                ` : html`
+                  <dees-workspace-monaco
+                    .filePath=${this.activeFilePath}
+                    .content=${this.getActiveFileContent()}
+                    .language=${this.getLanguageFromPath(this.activeFilePath)}
+                    @content-change=${this.handleContentChange}
+                  ></dees-workspace-monaco>
+                `}
+              </div>
+              <dees-actionbar></dees-actionbar>
+            </div>
+
+            <!-- Horizontal resize handle for terminal -->
+            ${this.showTerminal && !this.isTerminalCollapsed ? html`
+              <div
+                class="resize-handle-horizontal ${this.isDraggingTerminal ? 'dragging' : ''}"
+                @mousedown=${this.handleTerminalMouseDown}
+              ></div>
+            ` : ''}
+
+            <!-- Terminal panel -->
+            ${this.showTerminal ? html`
+              <div
+                class="terminal-panel ${this.isTerminalCollapsed ? 'collapsed' : ''}"
+                style="height: ${this.isTerminalCollapsed ? 32 : this.currentTerminalHeight}px"
+              >
+                <div class="panel-header">
+                  <div class="panel-tabs">
+                    <div
+                      class="panel-tab ${this.activeBottomPanel === 'terminal' ? 'active' : ''}"
+                      @click=${() => this.activeBottomPanel = 'terminal'}
+                    >
+                      <dees-icon .icon=${'lucide:terminal'} iconSize="14"></dees-icon>
+                      Terminal
+                    </div>
+                    <div
+                      class="panel-tab ${this.activeBottomPanel === 'problems' ? 'active' : ''}"
+                      @click=${() => this.activeBottomPanel = 'problems'}
+                    >
+                      <dees-icon .icon=${'lucide:circleAlert'} iconSize="14"></dees-icon>
+                      Problems
+                      ${this.diagnosticMarkers.length > 0 ? html`
+                        <span class="panel-tab-badge ${this.getErrorCount() === 0 ? 'warning' : ''}">${this.diagnosticMarkers.length}</span>
+                      ` : ''}
+                    </div>
+                  </div>
+                  <div class="panel-header-actions">
+                    <div class="panel-action" @click=${this.toggleTerminal}>
+                      <dees-icon
+                        .icon=${this.isTerminalCollapsed ? 'lucide:chevronUp' : 'lucide:chevronDown'}
+                        iconSize="14"
+                      ></dees-icon>
+                    </div>
+                  </div>
+                </div>
+                <div class="terminal-content" style="display: ${this.activeBottomPanel === 'terminal' ? 'block' : 'none'}">
+                  <dees-workspace-terminal
+                    .executionEnvironment=${this.executionEnvironment}
+                    .setupCommand=${''}
+                  ></dees-workspace-terminal>
+                </div>
+                <div class="problems-content" style="display: ${this.activeBottomPanel === 'problems' ? 'block' : 'none'}">
+                  ${this.renderProblemsPanel()}
+                </div>
+              </div>
+            ` : ''}
           </div>
         </div>
 
-        ${this.showTerminal ? html`
-          <div
-            class="terminal-panel ${this.isTerminalCollapsed ? 'collapsed' : ''}"
-            style="height: ${this.isTerminalCollapsed ? 32 : this.terminalHeight}px"
-          >
-            <div class="panel-header">
-              <div class="panel-tabs">
-                <div
-                  class="panel-tab ${this.activeBottomPanel === 'terminal' ? 'active' : ''}"
-                  @click=${() => this.activeBottomPanel = 'terminal'}
-                >
-                  <dees-icon .icon=${'lucide:terminal'} iconSize="14"></dees-icon>
-                  Terminal
-                </div>
-                <div
-                  class="panel-tab ${this.activeBottomPanel === 'problems' ? 'active' : ''}"
-                  @click=${() => this.activeBottomPanel = 'problems'}
-                >
-                  <dees-icon .icon=${'lucide:circleAlert'} iconSize="14"></dees-icon>
-                  Problems
-                  ${this.diagnosticMarkers.length > 0 ? html`
-                    <span class="panel-tab-badge ${this.getErrorCount() === 0 ? 'warning' : ''}">${this.diagnosticMarkers.length}</span>
-                  ` : ''}
-                </div>
-              </div>
-              <div class="panel-header-actions">
-                <div class="panel-action" @click=${this.toggleTerminal}>
-                  <dees-icon
-                    .icon=${this.isTerminalCollapsed ? 'lucide:chevronUp' : 'lucide:chevronDown'}
-                    iconSize="14"
-                  ></dees-icon>
-                </div>
-              </div>
-            </div>
-            <div class="terminal-content" style="display: ${this.activeBottomPanel === 'terminal' ? 'block' : 'none'}">
-              <dees-workspace-terminal
-                .executionEnvironment=${this.executionEnvironment}
-                .setupCommand=${''}
-              ></dees-workspace-terminal>
-            </div>
-            <div class="problems-content" style="display: ${this.activeBottomPanel === 'problems' ? 'block' : 'none'}">
-              ${this.renderProblemsPanel()}
-            </div>
-          </div>
-        ` : ''}
+        <!-- Bottom Bar (full width) -->
+        <dees-workspace-bottombar
+          .executionEnvironment=${this.executionEnvironment}
+          @run-process=${this.handleRunProcess}
+        ></dees-workspace-bottombar>
       </div>
     `;
   }
@@ -827,14 +1034,26 @@ testSmartPromise();
   async disconnectedCallback() {
     await super.disconnectedCallback();
     document.removeEventListener('keydown', this.keydownHandler);
+
+    // Clean up resize event listeners
+    document.removeEventListener('mousemove', this.handleFileTreeMouseMove);
+    document.removeEventListener('mouseup', this.handleFileTreeMouseUp);
+    document.removeEventListener('mousemove', this.handleTerminalMouseMove);
+    document.removeEventListener('mouseup', this.handleTerminalMouseUp);
+
     if (this.autoSaveInterval) {
       clearInterval(this.autoSaveInterval);
       this.autoSaveInterval = null;
     }
     this.stopNodeModulesWatcher();
+    this.stopAllFileWatchers();
   }
 
   public async firstUpdated() {
+    // Initialize current sizes from properties
+    this.currentFileTreeWidth = this.fileTreeWidth;
+    this.currentTerminalHeight = this.terminalHeight;
+
     if (this.executionEnvironment) {
       await this.initializeWorkspace();
     }
@@ -844,6 +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() {
@@ -998,6 +1222,191 @@ testSmartPromise();
     }
   }
 
+  // ========== Open File Watching for External Changes ==========
+
+  /**
+   * Start watching an open file for external changes
+   */
+  private startWatchingFile(path: string): void {
+    if (!this.executionEnvironment || this.openFileWatchers.has(path)) return;
+
+    try {
+      const watcher = this.executionEnvironment.watch(
+        path,
+        (_event, _filename) => {
+          // Debounce to avoid multiple rapid triggers
+          const existingTimeout = this.fileChangeDebounce.get(path);
+          if (existingTimeout) {
+            clearTimeout(existingTimeout);
+          }
+          const timeout = setTimeout(() => {
+            this.handleExternalFileChange(path);
+            this.fileChangeDebounce.delete(path);
+          }, 300);
+          this.fileChangeDebounce.set(path, timeout);
+        }
+      );
+      this.openFileWatchers.set(path, watcher);
+    } catch (error) {
+      console.warn(`Could not watch file ${path}:`, error);
+    }
+  }
+
+  /**
+   * Stop watching a file when it's closed
+   */
+  private stopWatchingFile(path: string): void {
+    const watcher = this.openFileWatchers.get(path);
+    if (watcher) {
+      watcher.stop();
+      this.openFileWatchers.delete(path);
+    }
+    const timeout = this.fileChangeDebounce.get(path);
+    if (timeout) {
+      clearTimeout(timeout);
+      this.fileChangeDebounce.delete(path);
+    }
+  }
+
+  /**
+   * Stop all file watchers
+   */
+  private stopAllFileWatchers(): void {
+    for (const watcher of this.openFileWatchers.values()) {
+      watcher.stop();
+    }
+    this.openFileWatchers.clear();
+
+    for (const timeout of this.fileChangeDebounce.values()) {
+      clearTimeout(timeout);
+    }
+    this.fileChangeDebounce.clear();
+  }
+
+  /**
+   * Handle external file change - show actionbar if file has local changes,
+   * otherwise silently update with cursor preservation
+   */
+  private async handleExternalFileChange(path: string): Promise<void> {
+    const file = this.openFiles.find(f => f.path === path);
+    if (!file || !this.executionEnvironment) return;
+
+    try {
+      // Read the new content from disk
+      const newContent = await this.executionEnvironment.readFile(path);
+
+      // If content is same as what we have, no action needed
+      if (newContent === file.content) return;
+
+      if (file.modified) {
+        // File has unsaved local changes AND disk changed - conflict!
+        const result = await this.actionbarElement?.show({
+          message: `"${file.name}" changed on disk. What do you want to do?`,
+          type: 'question',
+          icon: 'lucide:gitMerge',
+          actions: [
+            { id: 'load-disk', label: 'Load from Disk', primary: true },
+            { id: 'save-local', label: 'Save Local to Disk' },
+            { id: 'compare', label: 'Compare' },
+          ],
+          timeout: { duration: 15000, defaultActionId: 'load-disk' },
+          dismissible: true,
+        });
+
+        if (result?.actionId === 'load-disk') {
+          // Discard local changes, load disk version
+          await this.updateFileContent(path, newContent, false);
+        } else if (result?.actionId === 'save-local') {
+          // Keep local changes and save to disk (overwrite external)
+          await this.executionEnvironment.writeFile(path, file.content);
+          // Mark as saved
+          this.openFiles = this.openFiles.map(f =>
+            f.path === path ? { ...f, modified: false } : f
+          );
+        } else if (result?.actionId === 'compare') {
+          // Open diff view
+          this.openDiffView(path, file.content, newContent);
+        }
+        // If dismissed, do nothing - user can manually resolve later
+      } else {
+        // No local changes - silently update with cursor preservation
+        await this.updateFileContent(path, newContent, true);
+      }
+    } catch (error) {
+      console.warn(`Failed to handle external change for ${path}:`, error);
+    }
+  }
+
+  /**
+   * Update file content in state and optionally in the editor
+   */
+  private async updateFileContent(
+    path: string,
+    newContent: string,
+    preserveCursor: boolean
+  ): Promise<void> {
+    // Update internal state
+    this.openFiles = this.openFiles.map(f =>
+      f.path === path ? { ...f, content: newContent, modified: false } : f
+    );
+
+    // If this is the active file, update Monaco editor
+    if (path === this.activeFilePath) {
+      const editor = this.shadowRoot?.querySelector('dees-workspace-monaco') as DeesWorkspaceMonaco;
+      if (editor) {
+        await editor.setContentExternal(newContent, preserveCursor);
+      }
+    }
+  }
+
+  /**
+   * Open the diff view to compare local and disk versions
+   */
+  private openDiffView(path: string, localContent: string, diskContent: string): void {
+    this.diffViewConfig = {
+      filePath: path,
+      originalContent: diskContent,
+      modifiedContent: localContent,
+      language: this.getLanguageFromPath(path),
+    };
+    this.showDiffView = true;
+  }
+
+  /**
+   * Handle diff view resolution
+   */
+  private async handleDiffResolved(e: CustomEvent): Promise<void> {
+    const { action, content } = e.detail;
+    const path = this.diffViewConfig?.filePath;
+
+    if (!path || !this.executionEnvironment) {
+      this.showDiffView = false;
+      this.diffViewConfig = null;
+      return;
+    }
+
+    if (action === 'use-local') {
+      // Save local content to disk
+      await this.executionEnvironment.writeFile(path, content);
+      this.openFiles = this.openFiles.map(f =>
+        f.path === path ? { ...f, content, modified: false } : f
+      );
+      // Update editor if active
+      if (path === this.activeFilePath) {
+        const editor = this.shadowRoot?.querySelector('dees-workspace-monaco') as DeesWorkspaceMonaco;
+        if (editor) {
+          await editor.setContentExternal(content, false);
+        }
+      }
+    } else if (action === 'use-disk') {
+      // Update editor with disk content
+      await this.updateFileContent(path, content, false);
+    }
+
+    this.showDiffView = false;
+    this.diffViewConfig = null;
+  }
+
   private async handleFileSelect(e: CustomEvent<{ path: string; name: string }>) {
     const { path, name } = e.detail;
     await this.openFile(path, name);
@@ -1022,6 +1431,9 @@ testSmartPromise();
       ];
       this.activeFilePath = path;
 
+      // Start watching for external changes
+      this.startWatchingFile(path);
+
       // Initialize IntelliSense lazily after first file opens (Monaco loads on demand)
       if (!this.intelliSenseInitialized) {
         // Wait for Monaco editor to mount and load Monaco from CDN
@@ -1058,6 +1470,9 @@ testSmartPromise();
       if (!confirmed) return;
     }
 
+    // Stop watching this file
+    this.stopWatchingFile(path);
+
     this.openFiles = this.openFiles.filter(f => f.path !== path);
 
     // If closing the active file, activate another one
@@ -1315,4 +1730,73 @@ testSmartPromise();
       resource: { path: m.resource.path },
     }));
   }
+
+  // ========== Bottom Bar Event Handlers ==========
+
+  /**
+   * Handle run-process events from bottom bar widgets
+   * Creates a new terminal tab for the process
+   */
+  private async handleRunProcess(e: CustomEvent<IRunProcessEventDetail>): Promise<void> {
+    const detail = e.detail;
+
+    // Find the terminal component
+    const terminal = this.shadowRoot?.querySelector('dees-workspace-terminal') as DeesWorkspaceTerminal;
+    if (!terminal) {
+      console.warn('Terminal component not found');
+      return;
+    }
+
+    // Expand terminal if collapsed
+    if (this.isTerminalCollapsed) {
+      this.isTerminalCollapsed = false;
+    }
+
+    // Switch to terminal panel
+    this.activeBottomPanel = 'terminal';
+
+    // Wait for UI update
+    await this.updateComplete;
+
+    // Create a new terminal tab for the process
+    await terminal.createProcessTab({
+      type: detail.type,
+      label: detail.label,
+      command: detail.command,
+      args: detail.args,
+      metadata: detail.metadata,
+      switchToTab: true,
+    });
+  }
+
+  // ========== Public Layout Methods ==========
+
+  /**
+   * Programmatically set the file tree width
+   */
+  public setFileTreeWidth(width: number): void {
+    const minWidth = 150;
+    const maxWidth = this.getBoundingClientRect().width * 0.5;
+    this.currentFileTreeWidth = Math.max(minWidth, Math.min(maxWidth, width));
+    window.dispatchEvent(new Event('resize'));
+  }
+
+  /**
+   * Programmatically set the terminal height
+   */
+  public setTerminalHeight(height: number): void {
+    const minHeight = 100;
+    const maxHeight = this.getBoundingClientRect().height * 0.7;
+    this.currentTerminalHeight = Math.max(minHeight, Math.min(maxHeight, height));
+    window.dispatchEvent(new Event('resize'));
+  }
+
+  /**
+   * Reset layout to initial property values
+   */
+  public resetLayout(): void {
+    this.currentFileTreeWidth = this.fileTreeWidth;
+    this.currentTerminalHeight = this.terminalHeight;
+    window.dispatchEvent(new Event('resize'));
+  }
 }

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

@@ -6,3 +6,5 @@ export * from './dees-workspace-terminal/index.js';
 export * from './dees-workspace-terminal-preview/index.js';
 export * from './dees-workspace-markdown/index.js';
 export * from './dees-workspace-markdownoutlet/index.js';
+export * from './dees-workspace-bottombar/index.js';
+export * from './dees-workspace-diff-editor/index.js';

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

@@ -0,0 +1,54 @@
+/**
+ * Action button configuration for the action bar
+ */
+export interface IActionBarAction {
+  /** Unique identifier for the action */
+  id: string;
+  /** Button label text */
+  label: string;
+  /** Primary action gets highlighted styling and receives timeout trigger */
+  primary?: boolean;
+  /** Lucide icon name (optional) */
+  icon?: string;
+}
+
+/**
+ * Configuration options for showing an action bar
+ */
+export interface IActionBarOptions {
+  /** Message text to display */
+  message: string;
+  /** Lucide icon name for the message (optional) */
+  icon?: string;
+  /** Visual type affects coloring */
+  type?: 'info' | 'warning' | 'error' | 'question';
+  /** Action buttons to display */
+  actions: IActionBarAction[];
+  /** Timeout configuration (optional) */
+  timeout?: {
+    /** Duration in milliseconds before auto-triggering default action */
+    duration: number;
+    /** ID of the action to auto-trigger when timeout expires */
+    defaultActionId: string;
+  };
+  /** Whether to show a dismiss (X) button */
+  dismissible?: boolean;
+}
+
+/**
+ * Result returned when an action bar is resolved
+ */
+export interface IActionBarResult {
+  /** ID of the action that was triggered */
+  actionId: string;
+  /** Whether the action was triggered by timeout (true) or user click (false) */
+  timedOut: boolean;
+}
+
+/**
+ * Internal queue item for pending action bars
+ */
+export interface IActionBarQueueItem {
+  options: IActionBarOptions;
+  resolve: (result: IActionBarResult) => void;
+}

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

@@ -0,0 +1,500 @@
+import {
+  customElement,
+  DeesElement,
+  type TemplateResult,
+  html,
+  css,
+  state,
+  cssManager,
+} from '@design.estate/dees-element';
+import { themeDefaultStyles } from '../00theme.js';
+import '../dees-icon/dees-icon.js';
+import type {
+  IActionBarOptions,
+  IActionBarResult,
+  IActionBarQueueItem,
+  IActionBarAction,
+} from './actionbar.interfaces.js';
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'dees-actionbar': DeesActionbar;
+  }
+}
+
+@customElement('dees-actionbar')
+export class DeesActionbar extends DeesElement {
+  // STATIC
+  public static demo = () => {
+    const getActionbar = (e: Event) => {
+      const button = e.currentTarget as HTMLElement;
+      const container = button.closest('.demo-container');
+      return container?.querySelector('dees-actionbar') as DeesActionbar | null;
+    };
+
+    const showActionBar = async (e: Event) => {
+      const actionbar = getActionbar(e);
+      if (!actionbar) return;
+      const result = await actionbar.show({
+        message: 'File changed externally. Reload?',
+        type: 'warning',
+        icon: 'lucide:alertTriangle',
+        actions: [
+          { id: 'reload', label: 'Reload', primary: true },
+          { id: 'ignore', label: 'Ignore' },
+        ],
+        timeout: { duration: 5000, defaultActionId: 'reload' },
+        dismissible: true,
+      });
+      console.log('Action bar result:', result);
+    };
+
+    const showErrorBar = async (e: Event) => {
+      const actionbar = getActionbar(e);
+      if (!actionbar) return;
+      const result = await actionbar.show({
+        message: 'Process failed with exit code 1',
+        type: 'error',
+        icon: 'lucide:xCircle',
+        actions: [
+          { id: 'retry', label: 'Retry', primary: true },
+          { id: 'dismiss', label: 'Dismiss' },
+        ],
+        timeout: { duration: 10000, defaultActionId: 'dismiss' },
+      });
+      console.log('Error bar result:', result);
+    };
+
+    const showQuestionBar = async (e: Event) => {
+      const actionbar = getActionbar(e);
+      if (!actionbar) return;
+      const result = await actionbar.show({
+        message: 'Save changes before closing?',
+        type: 'question',
+        icon: 'lucide:helpCircle',
+        actions: [
+          { id: 'save', label: 'Save', primary: true },
+          { id: 'discard', label: 'Discard' },
+          { id: 'cancel', label: 'Cancel' },
+        ],
+      });
+      console.log('Question bar result:', result);
+    };
+
+    return html`
+      <style>
+        .demo-container {
+          display: flex;
+          flex-direction: column;
+          height: 300px;
+          border: 1px solid #333;
+          border-radius: 8px;
+          overflow: hidden;
+        }
+        .demo-content {
+          flex: 1;
+          padding: 16px;
+          display: flex;
+          gap: 8px;
+          align-items: flex-start;
+        }
+      </style>
+      <div class="demo-container">
+        <div class="demo-content">
+          <dees-button @click=${showActionBar}>Warning</dees-button>
+          <dees-button @click=${showErrorBar}>Error</dees-button>
+          <dees-button @click=${showQuestionBar}>Question</dees-button>
+        </div>
+        <dees-actionbar></dees-actionbar>
+      </div>
+    `;
+  };
+
+  // Queue of pending action bars
+  private queue: IActionBarQueueItem[] = [];
+
+  // Current active bar state
+  @state() accessor currentBar: IActionBarOptions | null = null;
+  @state() accessor timeRemaining: number = 0;
+  @state() accessor progressPercent: number = 100;
+  @state() accessor isVisible: boolean = false;
+
+  // Timeout handling
+  private timeoutInterval: ReturnType<typeof setInterval> | null = null;
+  private currentResolve: ((result: IActionBarResult) => void) | null = null;
+
+  public static styles = [
+    themeDefaultStyles,
+    cssManager.defaultStyles,
+    css`
+      :host {
+        display: grid;
+        grid-template-rows: 0fr;
+        transition: grid-template-rows 0.2s ease-out;
+      }
+
+      :host(.visible) {
+        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;
+      }
+
+      .progress-bar {
+        height: 3px;
+        background: ${cssManager.bdTheme('hsl(0 0% 90%)', 'hsl(0 0% 18%)')};
+        overflow: hidden;
+      }
+
+      .progress-bar-fill {
+        height: 100%;
+        background: ${cssManager.bdTheme('hsl(210 100% 50%)', 'hsl(210 100% 60%)')};
+        transition: width 0.1s linear;
+      }
+
+      .progress-bar-fill.warning {
+        background: ${cssManager.bdTheme('hsl(38 92% 50%)', 'hsl(38 92% 55%)')};
+      }
+
+      .progress-bar-fill.error {
+        background: ${cssManager.bdTheme('hsl(0 70% 50%)', 'hsl(0 70% 55%)')};
+      }
+
+      .progress-bar-fill.question {
+        background: ${cssManager.bdTheme('hsl(270 70% 50%)', 'hsl(270 70% 60%)')};
+      }
+
+      .content {
+        display: flex;
+        align-items: center;
+        padding: 8px 12px;
+        gap: 12px;
+        min-height: 32px;
+      }
+
+      .message-section {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        flex: 1;
+        min-width: 0;
+      }
+
+      .message-icon {
+        flex-shrink: 0;
+        color: ${cssManager.bdTheme('hsl(0 0% 40%)', 'hsl(0 0% 60%)')};
+      }
+
+      .message-icon.info {
+        color: ${cssManager.bdTheme('hsl(210 100% 45%)', 'hsl(210 100% 60%)')};
+      }
+
+      .message-icon.warning {
+        color: ${cssManager.bdTheme('hsl(38 92% 45%)', 'hsl(38 92% 55%)')};
+      }
+
+      .message-icon.error {
+        color: ${cssManager.bdTheme('hsl(0 70% 50%)', 'hsl(0 70% 55%)')};
+      }
+
+      .message-icon.question {
+        color: ${cssManager.bdTheme('hsl(270 70% 50%)', 'hsl(270 70% 60%)')};
+      }
+
+      .message-text {
+        font-size: 13px;
+        color: ${cssManager.bdTheme('hsl(0 0% 20%)', 'hsl(0 0% 85%)')};
+        white-space: nowrap;
+        overflow: hidden;
+        text-overflow: ellipsis;
+      }
+
+      .actions-section {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        flex-shrink: 0;
+      }
+
+      .action-button {
+        display: flex;
+        align-items: center;
+        gap: 4px;
+        padding: 4px 10px;
+        border-radius: 4px;
+        font-size: 12px;
+        font-weight: 500;
+        cursor: pointer;
+        border: 1px solid transparent;
+        transition: all 0.15s ease;
+        white-space: nowrap;
+      }
+
+      .action-button.secondary {
+        background: transparent;
+        color: ${cssManager.bdTheme('hsl(0 0% 30%)', 'hsl(0 0% 70%)')};
+        border-color: ${cssManager.bdTheme('hsl(0 0% 80%)', 'hsl(0 0% 30%)')};
+      }
+
+      .action-button.secondary:hover {
+        background: ${cssManager.bdTheme('hsl(0 0% 92%)', 'hsl(0 0% 18%)')};
+      }
+
+      .action-button.primary {
+        background: ${cssManager.bdTheme('hsl(210 100% 50%)', 'hsl(210 100% 55%)')};
+        color: white;
+      }
+
+      .action-button.primary:hover {
+        background: ${cssManager.bdTheme('hsl(210 100% 45%)', 'hsl(210 100% 50%)')};
+      }
+
+      .action-button.primary.warning {
+        background: ${cssManager.bdTheme('hsl(38 92% 45%)', 'hsl(38 92% 50%)')};
+      }
+
+      .action-button.primary.warning:hover {
+        background: ${cssManager.bdTheme('hsl(38 92% 40%)', 'hsl(38 92% 45%)')};
+      }
+
+      .action-button.primary.error {
+        background: ${cssManager.bdTheme('hsl(0 70% 50%)', 'hsl(0 70% 55%)')};
+      }
+
+      .action-button.primary.error:hover {
+        background: ${cssManager.bdTheme('hsl(0 70% 45%)', 'hsl(0 70% 50%)')};
+      }
+
+      .action-button.primary.question {
+        background: ${cssManager.bdTheme('hsl(270 70% 50%)', 'hsl(270 70% 55%)')};
+      }
+
+      .action-button.primary.question:hover {
+        background: ${cssManager.bdTheme('hsl(270 70% 45%)', 'hsl(270 70% 50%)')};
+      }
+
+      .countdown {
+        font-size: 11px;
+        opacity: 0.8;
+        margin-left: 2px;
+      }
+
+      .dismiss-button {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        width: 20px;
+        height: 20px;
+        border-radius: 4px;
+        cursor: pointer;
+        color: ${cssManager.bdTheme('hsl(0 0% 50%)', 'hsl(0 0% 50%)')};
+        transition: all 0.15s ease;
+      }
+
+      .dismiss-button:hover {
+        background: ${cssManager.bdTheme('hsl(0 0% 88%)', 'hsl(0 0% 22%)')};
+        color: ${cssManager.bdTheme('hsl(0 0% 30%)', 'hsl(0 0% 70%)')};
+      }
+    `,
+  ];
+
+  public render(): TemplateResult {
+    if (!this.currentBar) {
+      return html``;
+    }
+
+    const bar = this.currentBar;
+    const type = bar.type || 'info';
+    const hasTimeout = bar.timeout && this.timeRemaining > 0;
+
+    return html`
+      <div class="actionbar-item">
+        ${hasTimeout ? html`
+          <div class="progress-bar">
+            <div
+              class="progress-bar-fill ${type}"
+              style="width: ${this.progressPercent}%"
+            ></div>
+          </div>
+        ` : ''}
+        <div class="content">
+          <div class="message-section">
+            ${bar.icon ? html`
+              <dees-icon
+                class="message-icon ${type}"
+                .icon=${bar.icon}
+                iconSize="16"
+              ></dees-icon>
+            ` : ''}
+            <span class="message-text">${bar.message}</span>
+          </div>
+          <div class="actions-section">
+            ${bar.actions.map(action => this.renderActionButton(action, bar, hasTimeout))}
+            ${bar.dismissible ? html`
+              <div
+                class="dismiss-button"
+                @click=${() => this.handleDismiss()}
+                title="Dismiss"
+              >
+                <dees-icon .icon=${'lucide:x'} iconSize="14"></dees-icon>
+              </div>
+            ` : ''}
+          </div>
+        </div>
+      </div>
+    `;
+  }
+
+  private renderActionButton(
+    action: IActionBarAction,
+    bar: IActionBarOptions,
+    hasTimeout: boolean | undefined
+  ): TemplateResult {
+    const isPrimary = action.primary;
+    const type = bar.type || 'info';
+    const isDefaultAction = bar.timeout?.defaultActionId === action.id;
+    const showCountdown = hasTimeout && isDefaultAction;
+    const seconds = Math.ceil(this.timeRemaining / 1000);
+
+    return html`
+      <button
+        class="action-button ${isPrimary ? `primary ${type}` : 'secondary'}"
+        @click=${() => this.handleAction(action.id, false)}
+      >
+        ${action.icon ? html`
+          <dees-icon .icon=${action.icon} iconSize="12"></dees-icon>
+        ` : ''}
+        <span>${action.label}</span>
+        ${showCountdown ? html`
+          <span class="countdown">(${seconds}s)</span>
+        ` : ''}
+      </button>
+    `;
+  }
+
+  // ========== Public API ==========
+
+  /**
+   * Show an action bar with the given options.
+   * Returns a promise that resolves when an action is taken.
+   */
+  public async show(options: IActionBarOptions): Promise<IActionBarResult> {
+    return new Promise((resolve) => {
+      // Add to queue
+      this.queue.push({ options, resolve });
+
+      // If no current bar, process queue
+      if (!this.currentBar) {
+        this.processQueue();
+      }
+    });
+  }
+
+  /**
+   * Dismiss the current action bar without triggering any action.
+   */
+  public dismiss(): void {
+    this.handleDismiss();
+  }
+
+  /**
+   * Clear all pending action bars in the queue.
+   */
+  public clearQueue(): void {
+    // Resolve all queued items with dismiss
+    for (const item of this.queue) {
+      item.resolve({ actionId: 'dismissed', timedOut: false });
+    }
+    this.queue = [];
+  }
+
+  // ========== Private Methods ==========
+
+  /**
+   * 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;
+  }
+
+  private processQueue(): void {
+    if (this.queue.length === 0) {
+      // Hide with animation - don't await, let it run async
+      this.hideCurrentBar();
+      return;
+    }
+
+    const item = this.queue.shift()!;
+    this.currentBar = item.options;
+    this.currentResolve = item.resolve;
+    this.isVisible = true;
+    this.classList.add('visible');
+
+    // Setup timeout if configured
+    if (item.options.timeout) {
+      this.startTimeout(item.options.timeout.duration, item.options.timeout.defaultActionId);
+    }
+  }
+
+  private startTimeout(duration: number, defaultActionId: string): void {
+    this.timeRemaining = duration;
+    this.progressPercent = 100;
+
+    const startTime = Date.now();
+    const updateInterval = 50; // Update every 50ms for smooth animation
+
+    this.timeoutInterval = setInterval(() => {
+      const elapsed = Date.now() - startTime;
+      this.timeRemaining = Math.max(0, duration - elapsed);
+      this.progressPercent = (this.timeRemaining / duration) * 100;
+
+      if (this.timeRemaining <= 0) {
+        this.clearTimeoutInterval();
+        this.handleAction(defaultActionId, true);
+      }
+    }, updateInterval);
+  }
+
+  private clearTimeoutInterval(): void {
+    if (this.timeoutInterval) {
+      clearInterval(this.timeoutInterval);
+      this.timeoutInterval = null;
+    }
+  }
+
+  private handleAction(actionId: string, timedOut: boolean): void {
+    this.clearTimeoutInterval();
+
+    if (this.currentResolve) {
+      this.currentResolve({ actionId, timedOut });
+    }
+
+    // Process next item in queue
+    this.processQueue();
+  }
+
+  private handleDismiss(): void {
+    this.handleAction('dismissed', false);
+  }
+
+  public async disconnectedCallback(): Promise<void> {
+    await super.disconnectedCallback();
+    this.clearTimeoutInterval();
+  }
+}

ts_web/elements/dees-actionbar/index.ts

@@ -0,0 +1,2 @@
+export * from './dees-actionbar.js';
+export * from './actionbar.interfaces.js';

ts_web/elements/index.ts

@@ -14,6 +14,7 @@ export * from './00group-runtime/index.js';
 export * from './00group-simple/index.js';
 
 // Standalone Components
+export * from './dees-actionbar/index.js';
 export * from './dees-badge/index.js';
 export * from './dees-chips/index.js';
 export * from './dees-contextmenu/index.js';

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';