Fix unexpected width error in long distance hint preview editor

[Copilot]

maxContentWidthInRange logs an unexpected width error when called on the long distance hint preview editor before it's rendered. This occurs because getWidthOfLine returns -1 for unrendered editors, which wasn't handled.

Changes

• Handle getWidthOfLine returning -1 by using a character-width-based approximation, consistent with the sibling function getContentSizeOfLines
• Remove the now-unnecessary error logging

// Before: no handling for unrendered editor case
const lineContentWidth = editor.getWidthOfLine(i, reader);
maxContentWidth = Math.max(maxContentWidth, lineContentWidth);

// After: approximate width when editor not yet rendered
let lineContentWidth = editor.getWidthOfLine(i, reader);
if (lineContentWidth === -1) {
    const column = model.getLineMaxColumn(i);
    const typicalHalfwidthCharacterWidth = editor.editor.getOption(EditorOption.fontInfo).typicalHalfwidthCharacterWidth;
    lineContentWidth = column * typicalHalfwidthCharacterWidth;
}
maxContentWidth = Math.max(maxContentWidth, lineContentWidth);

Original prompt

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This section details on the original issue you should resolve

<issue_title>NES: Long Distance Hint can cause unexpected width error</issue_title>
<issue_description>maxContentWidthInRange sometimes logs an unexpected width error for the preview editor in the long distance hint. The long distance hint then shows an empty preview.

Seems to only happen on first layout. We run maxContentWidthInRange before we ever called layout on the preview editor, can that cause an issue?</issue_description>

Comments on the Issue (you are @copilot in this section)

@hediet It can happen when the editor is not rendered yet.

• Fixes NES: Long Distance Hint can cause unexpected width error #283550

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