Fix DPI scaling issues: dynamic status bar height and parts sizing

[radami2006]

Problem

On high-DPI systems, the status bar was partially clipped:

• Hardcoded status bar height (22px) caused bottom truncation.
• Fixed part widths caused rightmost panels (encoding / line endings / zoom) to be cut.

Solution

• Compute the actual status bar height at runtime instead of using a hardcoded value.
• Dynamically size status bar parts based on text width and current DPI.

Result

• No more clipping on high-DPI displays.
• Correct layout across different DPI scales and system themes.

How to test

1. Run the app on a system with DPI scaling >100%.
2. Toggle the status bar.
3. Resize the window and verify the bottom/right areas are fully visible.

[ForLoopCodes]

lgtm