Canvas-panel centering still causes alignment issues with short lines (see PR #246)

Although the changes from PR #246 ("244 bottom image alignment") have been applied, there are still alignment issues when rendering short lines. This appears to be due to the way canvas-panel calculates and applies centering, which does not always align short lines as expected. Further investigation and adjustment to the centering logic in canvas-panel is needed to resolve these remaining issues.

Related PR: #246

Steps to reproduce:
- Apply the changes from PR #246
- Render a set of long and short lines using canvas-panel
- Observe that the alignment below is still off-center (leftwards) in some cases

Expected behavior:
- All lines, regardless of length, should be properly centered within the panel.