fix(word): strip HTML style blocks and alignment divs from DOCX input

Pre-process markdown before Word/DOCX export to remove raw HTML artifacts

(<style> blocks, HTML comments, and <div align=...> tags) that were

visible in the generated document. Applies to single and batch DOCX exports

via both Pandoc and WordTemplateExporter paths.

tests/word-template-exporter.test.js

@@ -0,0 +1,61 @@
+/**
+ * Tests for WordTemplateExporter
+ */
+
+const WordTemplateExporter = require('../src/wordTemplateExporter');
+
+describe('WordTemplateExporter.preprocessMarkdownForWordExport', () => {
+  test('removes HTML style blocks', () => {
+    const input = `<style>
+<!-- sneh-a4-print v1 -->
+@media print { body { font-size: 8pt; } }
+</style>
+
+# Heading
+`;
+    const output = WordTemplateExporter.preprocessMarkdownForWordExport(input);
+    expect(output).not.toContain('<style');
+    expect(output).not.toContain('</style>');
+    expect(output).not.toContain('sneh-a4-print');
+    expect(output).not.toContain('@media print');
+    expect(output).toContain('# Heading');
+  });
+
+  test('removes HTML comments outside style blocks', () => {
+    const input = `<!-- comment -->
+Hello world
+`;
+    const output = WordTemplateExporter.preprocessMarkdownForWordExport(input);
+    expect(output).not.toContain('<!--');
+    expect(output).not.toContain('-->');
+    expect(output).toContain('Hello world');
+  });
+
+  test('removes alignment div tags', () => {
+    const input = `<div align="center">
+Centered content
+</div>
+`;
+    const output = WordTemplateExporter.preprocessMarkdownForWordExport(input);
+    expect(output).not.toContain('<div align="center">');
+    expect(output).not.toContain('</div>');
+    expect(output).toContain('Centered content');
+  });
+
+  test('preserves regular markdown content', () => {
+    const input = `# Title
+
+| A | B |
+|---|---|
+| 1 | 2 |
+`;
+    const output = WordTemplateExporter.preprocessMarkdownForWordExport(input);
+    expect(output).toBe(input);
+  });
+
+  test('handles content with no HTML artifacts', () => {
+    const input = 'Plain text paragraph.';
+    const output = WordTemplateExporter.preprocessMarkdownForWordExport(input);
+    expect(output).toBe(input);
+  });
+});