fix: cap text indentation at 6.5 inches (9360 points)

Add maxIndentPoints constant and enforce limit in calculateNewIndentation to prevent excessive paragraph indentation values.

Add test coverage for maximum indent behavior.

Co-authored-by: Copilot <copilot@github.com>

Author: tiagocmendes

packages/super-editor/src/editors/v1/core/commands/textIndent.js

@@ -2,6 +2,7 @@ import { getResolvedParagraphProperties } from '@extensions/paragraph/resolvedPr
 import { ptToTwips } from '@converter/helpers';
 
 const defaultIncrementPoints = 36;
+const maxIndentPoints = 9360; // 6.5 inches
 
 /**
  * Increase text indentation
@@ -64,6 +65,10 @@ function calculateNewIndentation(node, delta) {
     left += increment;
   }
 
+  if (left > maxIndentPoints) {
+    left = maxIndentPoints;
+  }
+
   if (left <= 0) {
     left = null;
   }

packages/super-editor/src/editors/v1/core/commands/textIndent.test.js

@@ -90,4 +90,16 @@ describe('text indent commands', () => {
     const finalNode = afterUnset.doc.firstChild;
     expect(finalNode.attrs.paragraphProperties.indent).toBeUndefined();
   });
+
+  it('increaseTextIndent caps at maximum indent (9360 points)', () => {
+    const nearMaxIndent = 9000;
+    const state = createState({ paragraphProperties: { indent: { left: nearMaxIndent } } });
+    getResolvedParagraphProperties.mockReturnValueOnce({ indent: { left: nearMaxIndent } });
+
+    const { dispatched, nextState } = runCommand(increaseTextIndent(), state);
+
+    expect(dispatched).toBe(true);
+    const updated = nextState.doc.firstChild;
+    expect(updated.attrs.paragraphProperties.indent.left).toBe(9360);
+  });
 });