fix(layout-bridge): hash page number formats

Author: luccas-harbour

packages/layout-engine/layout-bridge/src/cacheInvalidation.ts

@@ -51,6 +51,7 @@ export function computeHeaderFooterContentHash(blocks: FlowBlock[]): string {
         if ('bold' in run && run.bold) parts.push('b');
         if ('italic' in run && run.italic) parts.push('i');
         if ('token' in run && run.token) parts.push(`token:${run.token}`);
+        if ('pageNumberFormat' in run && run.pageNumberFormat) parts.push(`pnf:${run.pageNumberFormat}`);
       }
     }
   }

packages/layout-engine/layout-bridge/test/cacheInvalidation.test.ts

@@ -52,6 +52,25 @@ describe('Cache Invalidation', () => {
         expect(hash).toContain('token:pageNumber');
       });
 
+      it('should include page number token format in hash', () => {
+        const decimalBlocks: FlowBlock[] = [
+          {
+            kind: 'paragraph',
+            id: 'p1',
+            runs: [{ text: '0', token: 'pageNumber', pageNumberFormat: 'decimal' }],
+          } as ParagraphBlock,
+        ];
+        const romanBlocks: FlowBlock[] = [
+          {
+            kind: 'paragraph',
+            id: 'p1',
+            runs: [{ text: '0', token: 'pageNumber', pageNumberFormat: 'upperRoman' }],
+          } as ParagraphBlock,
+        ];
+
+        expect(computeHeaderFooterContentHash(decimalBlocks)).not.toBe(computeHeaderFooterContentHash(romanBlocks));
+      });
+
       it('should produce different hashes for different content', () => {
         const blocks1: FlowBlock[] = [
           {