diff --git a/README.md b/README.md
index 040e92b..287d407 100644
--- a/README.md
+++ b/README.md
@@ -257,4 +257,4 @@ Amit Haridas (amit.wh@gmail.com)
 
 ## Version
 
-v4.9.1
+v4.9.2
diff --git a/UPDATES.md b/UPDATES.md
index 8767dc1..7325694 100644
--- a/UPDATES.md
+++ b/UPDATES.md
@@ -1,5 +1,18 @@
 # PanConverter - Updates & Changelog
 
+## Version 4.9.2 (2026-09-14)
+
+### Fixes
+- **Standalone ASCII Art Generator — broken stylesheet path**: `src/ascii-generator.html:7` linked `<link rel="stylesheet" href="../fonts.css" />`. The HTML loads via `BrowserWindow.loadFile(path.join(__dirname, 'ascii-generator.html'))` where `__dirname` is `src/`, so `../fonts.css` escaped the `src/` directory and resolved to a non-existent `<project>/fonts.css`. Changed to `fonts.css` (same file, src/-relative — mirrors `src/index.html:29`). The window rendered without its font rules, leaving the header in the fallback system stack.
+- **Standalone ASCII Art Generator — dead Box/Templates UI**: the controller (`src/renderer/ascii-controller.js`) shipped three mode tabs (`Text Banner` / `Box-Frame` / `Templates`), 18 `.template-btn[data-template]` buttons, and a Box form (`#box-text` / `#box-style` / `#box-padding`) but wired none of them. Clicking any tab or button was a no-op. Wired all of them:
+  - `setMode(mode)` toggles `.active` on the right `.mode-tab` and the matching `.mode-section` (`text-mode` / `box-mode` / `templates-mode`).
+  - Template buttons call `api.generate({ text: '', font: 'template:<id>' })` so the orchestrator owns template content; preview updates and the button gets `.active`.
+  - Box mode renders the user text with a border using the chosen style (`single` / `double` / `rounded` / `bold` / `ascii`) and padding, exposed as a pure `window.ASCIIBoxRenderer.renderBox(text, style, padding)` helper.
+  - All 11 brief-required behaviours (text-input / font-picker / font-search / insert / copy / save / generate, last-font persistence, debounced preview) remain intact.
+
+### Tests
+- New `tests/ascii-controller.test.js` — 6 tests covering the stylesheet path (no `..` escape), pure box renderer (single + ascii styles), mode-tab switching (Box and Templates), and template button → preview wiring.
+
 ## Version 4.9.1 (2026-09-14)
 
 ### Fixes
diff --git a/package.json b/package.json
index 552a1b6..55679fa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "markdown-converter",
-  "version": "4.9.1",
+  "version": "4.9.2",
   "description": "Professional Markdown editor and universal file converter with PDF editing, batch processing, and syntax highlighting",
   "main": "src/main.js",
   "scripts": {
diff --git a/src/ascii-generator.html b/src/ascii-generator.html
index ec7d7d5..90c473c 100644
--- a/src/ascii-generator.html
+++ b/src/ascii-generator.html
@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>ASCII Art Generator - MarkdownConverter</title>
-    <link rel="stylesheet" href="../fonts.css" />
+    <link rel="stylesheet" href="fonts.css" />
     <style>
       :root {
         --ci-dark-gray: #464646;
diff --git a/src/renderer/ascii-controller.js b/src/renderer/ascii-controller.js
index 648969a..a37fb60 100644
--- a/src/renderer/ascii-controller.js
+++ b/src/renderer/ascii-controller.js
@@ -6,6 +6,11 @@
  * Insert / Copy / Save actions. Last-used font is restored from
  * electron-store (via main) and saved on every change.
  *
+ * Wires three mode tabs (Text Banner / Box-Frame / Templates) plus the
+ * 18 template buttons and the Box form fields (#box-text, #box-style,
+ * #box-padding). Templates route through `api.generate({ font: 'template:<id>' })`
+ * so the orchestrator owns template content.
+ *
  * No bundler, no framework — pure DOM + window.electronAPI bridge.
  */
 (function () {
@@ -23,12 +28,26 @@
     btnSave: document.getElementById('btn-save'),
     btnGenerate: document.getElementById('btn-generate'),
     warning: document.getElementById('ascii-warning'),
+    modeTabs: document.querySelectorAll('.mode-tab[data-mode]'),
+    modeSections: document.querySelectorAll('.mode-section'),
+    templateButtons: document.querySelectorAll('.template-btn[data-template]'),
+    boxText: document.getElementById('box-text'),
+    boxStyle: document.getElementById('box-style'),
+    boxPadding: document.getElementById('box-padding'),
+  };
+
+  // Section ID for each mode. Keep in sync with ascii-generator.html IDs.
+  const MODE_SECTION_ID = {
+    text: 'text-mode',
+    box: 'box-mode',
+    templates: 'templates-mode',
   };
 
   let _fonts = [];
   let _currentFont = 'standard';
   let _previewText = '';
   let _searchDebounce = null;
+  let _currentMode = 'text';
 
   function showWarning(msg) {
     if (!els.warning) return;
@@ -45,8 +64,124 @@
     };
   }
 
+  /**
+   * Switch the active mode tab and the visible mode section.
+   * Toggles the `.active` class on tabs and on the matching `.mode-section`.
+   * @param {'text'|'box'|'templates'} mode
+   */
+  function setMode(mode) {
+    if (!MODE_SECTION_ID[mode]) return;
+    _currentMode = mode;
+
+    // Toggle tab buttons.
+    els.modeTabs.forEach((tab) => {
+      if (tab.dataset.mode === mode) tab.classList.add('active');
+      else tab.classList.remove('active');
+    });
+
+    // Toggle mode sections.
+    els.modeSections.forEach((sec) => {
+      if (sec.id === MODE_SECTION_ID[mode]) sec.classList.add('active');
+      else sec.classList.remove('active');
+    });
+
+    // Each mode has its own preview pipeline; trigger a refresh.
+    refreshPreview();
+  }
+
+  /**
+   * Build a simple box border around the user's text using the chosen style.
+   * Pure function — exported on window for tests via ASCIIBoxRenderer.
+   * @param {string} text
+   * @param {'single'|'double'|'rounded'|'bold'|'ascii'} style
+   * @param {number} padding  0..10 spaces on each side
+   * @returns {string}
+   */
+  function renderBox(text, style, padding) {
+    const lines = String(text ?? '').split('\n');
+    const pad = Math.max(0, Math.min(10, Number(padding) || 0));
+    const padded = lines.map((l) => ' '.repeat(pad) + l + ' '.repeat(pad));
+    const width = padded.reduce((w, l) => Math.max(w, visibleLength(l)), 0);
+
+    let tl, tr, bl, br, h, v;
+    switch (style) {
+      case 'double':
+        tl = '╔';
+        tr = '╗';
+        bl = '╚';
+        br = '╝';
+        h = '═';
+        v = '║';
+        break;
+      case 'rounded':
+        tl = '╭';
+        tr = '╮';
+        bl = '╰';
+        br = '╯';
+        h = '─';
+        v = '│';
+        break;
+      case 'bold':
+        tl = '┏';
+        tr = '┓';
+        bl = '┗';
+        br = '┛';
+        h = '━';
+        v = '┃';
+        break;
+      case 'ascii':
+        tl = '+';
+        tr = '+';
+        bl = '+';
+        br = '+';
+        h = '-';
+        v = '|';
+        break;
+      case 'single':
+      default:
+        tl = '┌';
+        tr = '┐';
+        bl = '└';
+        br = '┘';
+        h = '─';
+        v = '│';
+        break;
+    }
+
+    const top = tl + h.repeat(width + 2) + tr;
+    const bot = bl + h.repeat(width + 2) + br;
+    const body = padded.map((l) => v + ' ' + l.padEnd(width, ' ') + ' ' + v).join('\n');
+    return [top, body, bot].join('\n');
+  }
+
+  /**
+   * Count printable character width, ignoring box-drawing characters and
+   * spaces (which all occupy a single monospace column).
+   */
+  function visibleLength(s) {
+    // Box-drawing chars and most printable ASCII occupy one column in our
+    // monospace font. This is a deliberate simplification — emoji or wide
+    // CJK would need a more sophisticated width table.
+    return Array.from(s).length;
+  }
+
   async function refreshPreview() {
     if (!api) return;
+    if (_currentMode === 'templates') {
+      // Template mode is button-driven; no live preview here.
+      return;
+    }
+    if (_currentMode === 'box') {
+      const text = els.boxText ? els.boxText.value : '';
+      const style = els.boxStyle ? els.boxStyle.value : 'single';
+      const padding = els.boxPadding ? els.boxPadding.value : 2;
+      _previewText = text;
+      const out = renderBox(text, style, padding);
+      els.preview.textContent = out;
+      showWarning('');
+      return;
+    }
+    // text mode (default)
     const text = els.textInput ? els.textInput.value : 'HELLO';
     _previewText = text;
     try {
@@ -93,6 +228,26 @@
     renderFontList('');
   }
 
+  /**
+   * Render a template by id: fetch its content via the orchestrator's
+   * template:<id> font namespace and update the preview.
+   */
+  async function renderTemplate(templateId) {
+    if (!api) return;
+    try {
+      const out = await api.generate({ text: '', font: `template:${templateId}` });
+      els.preview.textContent = out;
+      showWarning('');
+      // Mark the clicked button as active.
+      els.templateButtons.forEach((btn) => {
+        if (btn.dataset.template === templateId) btn.classList.add('active');
+        else btn.classList.remove('active');
+      });
+    } catch (err) {
+      showWarning(`Template render failed: ${err.message || err}`);
+    }
+  }
+
   function wireEvents() {
     if (els.textInput) {
       els.textInput.addEventListener('input', debounce(refreshPreview, 200));
@@ -151,6 +306,39 @@
         }
       });
     }
+
+    // ---- mode-tab switching (Text Banner / Box-Frame / Templates) ----
+    els.modeTabs.forEach((tab) => {
+      tab.addEventListener('click', () => {
+        const mode = tab.dataset.mode;
+        if (mode) setMode(mode);
+      });
+    });
+
+    // ---- Box form: any change re-renders the box preview ----
+    if (els.boxText) {
+      els.boxText.addEventListener('input', () => {
+        if (_currentMode === 'box') refreshPreview();
+      });
+    }
+    if (els.boxStyle) {
+      els.boxStyle.addEventListener('change', () => {
+        if (_currentMode === 'box') refreshPreview();
+      });
+    }
+    if (els.boxPadding) {
+      els.boxPadding.addEventListener('input', () => {
+        if (_currentMode === 'box') refreshPreview();
+      });
+    }
+
+    // ---- Template buttons: render the chosen template into the preview ----
+    els.templateButtons.forEach((btn) => {
+      btn.addEventListener('click', () => {
+        const id = btn.dataset.template;
+        if (id) renderTemplate(id);
+      });
+    });
   }
 
   async function bootstrap() {
@@ -159,7 +347,10 @@
     await refreshPreview();
   }
 
+  // Expose pure helpers for tests; do not pollute window in production beyond
+  // what the bootstrap entry-point needs.
   window.ASCIIController = { bootstrap };
+  window.ASCIIBoxRenderer = { renderBox };
   if (document.readyState === 'loading') {
     document.addEventListener('DOMContentLoaded', bootstrap);
   } else {
diff --git a/tests/ascii-controller.test.js b/tests/ascii-controller.test.js
new file mode 100644
index 0000000..ad67a15
--- /dev/null
+++ b/tests/ascii-controller.test.js
@@ -0,0 +1,147 @@
+/**
+ * @jest-environment jsdom
+ *
+ * Tests the standalone ASCII Art Generator window's renderer controller
+ * (src/renderer/ascii-controller.js). Loads the real HTML and the real
+ * controller script into jsdom, mocks window.electronAPI.generators.ascii,
+ * and asserts that:
+ *   - The fonts.css <link> uses a src/-relative path (no `..` escape).
+ *   - Mode-tab clicks switch the visible mode section.
+ *   - Template-button clicks update the preview with the orchestrator's
+ *     template:<id> output.
+ *   - The pure box renderer wraps text with the requested border style.
+ */
+const fs = require('fs');
+const path = require('path');
+
+const HTML_PATH = path.join(__dirname, '..', 'src', 'ascii-generator.html');
+const CONTROLLER_PATH = path.join(__dirname, '..', 'src', 'renderer', 'ascii-controller.js');
+
+/**
+ * Build the ascii-generator DOM in the jsdom document and execute the
+ * controller script in the same realm (window + document globals).
+ *
+ * The HTML file is parsed by the jsdom document and the controller
+ * source is run via `vm.runInThisContext` so its IIFE captures the real
+ * `window` and `document` without string interpolation.
+ */
+function mount() {
+  // Parse the HTML body content into the jsdom document. We use the
+  // existing testRealm — the controller only inspects IDs that exist in
+  // the standalone window's HTML, so a minimal copy is fine.
+  const html = fs.readFileSync(HTML_PATH, 'utf-8');
+  // Strip <head>/<body> wrappers — jsdom already provides those.
+  const bodyMatch = html.match(/<body[^>]*>([\s\S]*)<\/body>/i);
+  document.body.innerHTML = bodyMatch ? bodyMatch[1] : html;
+
+  // Mock the electronAPI bridge before the controller reads it.
+  const generateMock = jest.fn(async ({ text, font }) => {
+    if (typeof font === 'string' && font.startsWith('template:')) {
+      return `<<${font.slice('template:'.length)}>>`;
+    }
+    return `<<font=${font}::text=${text}>>`;
+  });
+  const apiMock = {
+    listFonts: jest.fn(async () => [
+      { id: 'standard', label: 'Standard', kind: 'hand-coded' },
+      { id: 'big', label: 'Big', kind: 'hand-coded' },
+      { id: 'template:arrow-right', label: 'Template · Arrow Right', kind: 'template' },
+    ]),
+    generate: generateMock,
+    lastFont: jest.fn(async () => null),
+    copy: jest.fn(async () => undefined),
+    save: jest.fn(async () => ({ canceled: true })),
+  };
+  window.electronAPI = {
+    generators: { ascii: apiMock },
+    send: jest.fn(),
+  };
+
+  // Execute the controller source in the test realm. The IIFE references
+  // `window` and `document` directly, so we wrap it in an outer function
+  // that passes the jsdom globals as parameters. Using Function() here is
+  // safe: the only interpolated value is the file contents (read from a
+  // path we control in the repo), not user input.
+  const src = fs.readFileSync(CONTROLLER_PATH, 'utf-8');
+  // eslint-disable-next-line no-new-func
+  new Function('window', 'document', src)(window, document);
+
+  return { apiMock, generateMock };
+}
+
+afterEach(() => {
+  jest.clearAllMocks();
+});
+
+describe('ascii-generator.html — fonts.css link', () => {
+  test('does not escape src/ (no "../" in href)', () => {
+    const html = fs.readFileSync(HTML_PATH, 'utf-8');
+    const linkRe = /<link[^>]*rel=["']stylesheet["'][^>]*href=["']([^"']+)["'][^>]*>/i;
+    const match = html.match(linkRe);
+    expect(match).not.toBeNull();
+    const href = match[1];
+    expect(href.startsWith('../')).toBe(false);
+    // The standalone window's document base is src/, so fonts.css must be
+    // src/-relative (not ../fonts.css).
+    expect(href).toBe('fonts.css');
+  });
+});
+
+describe('ascii-controller: pure box renderer', () => {
+  test('wraps text with a single-line border by default', () => {
+    mount();
+    const { renderBox } = window.ASCIIBoxRenderer;
+    const out = renderBox('Hi', 'single', 0);
+    expect(out).toBe('┌────┐\n│ Hi │\n└────┘');
+  });
+
+  test('honours padding and ascii (+|-) style', () => {
+    mount();
+    const { renderBox } = window.ASCIIBoxRenderer;
+    const out = renderBox('Hi', 'ascii', 1);
+    // 1 space pad + 'Hi' + 1 space pad = width 4 inside, +2 borders = 6 wide.
+    expect(out).toBe('+------+\n|  Hi  |\n+------+');
+  });
+});
+
+describe('ascii-controller: mode-tab switching', () => {
+  test('clicking the Box tab reveals box-mode and hides the others', async () => {
+    mount();
+    await window.ASCIIController.bootstrap();
+    const boxTab = document.querySelector('.mode-tab[data-mode="box"]');
+    boxTab.click();
+
+    expect(boxTab.classList.contains('active')).toBe(true);
+    expect(document.getElementById('box-mode').classList.contains('active')).toBe(true);
+    expect(document.getElementById('text-mode').classList.contains('active')).toBe(false);
+    expect(document.getElementById('templates-mode').classList.contains('active')).toBe(false);
+  });
+
+  test('clicking the Templates tab reveals templates-mode', async () => {
+    mount();
+    await window.ASCIIController.bootstrap();
+    const tplTab = document.querySelector('.mode-tab[data-mode="templates"]');
+    tplTab.click();
+
+    expect(tplTab.classList.contains('active')).toBe(true);
+    expect(document.getElementById('templates-mode').classList.contains('active')).toBe(true);
+  });
+});
+
+describe('ascii-controller: template buttons', () => {
+  test('clicking a template button renders its content into the preview', async () => {
+    const { generateMock } = mount();
+    await window.ASCIIController.bootstrap();
+    const btn = document.querySelector('.template-btn[data-template="arrow-right"]');
+    btn.click();
+    // Wait for the async generate() call to resolve.
+    await Promise.resolve();
+    await Promise.resolve();
+
+    expect(generateMock).toHaveBeenCalledWith(
+      expect.objectContaining({ font: 'template:arrow-right' })
+    );
+    expect(document.getElementById('preview').textContent).toBe('<<arrow-right>>');
+    expect(btn.classList.contains('active')).toBe(true);
+  });
+});