Stabilize note list text alignment on Windows

[MizuCiaossu]

Summary

• use stable font line metrics for note list title, date, content, and parent rows
• stop laying out note rows from per-string boundingRect() heights, which vary with the actual glyphs rendered
• keep NoteListDelegate and NoteListDelegateEditor in sync so the persistent editor matches the normal row renderer

Fixes #164.

Why

The Windows alignment bug appears to come from using text-specific bounding boxes to position stacked note row labels. On some Windows font/DPI combinations, that can make row spacing depend on the glyphs in each note title/date/content, which leads to visually inconsistent alignment.

Testing

• Not run locally in this environment because the required Qt/CMake Windows toolchain is not installed here.
• The change is limited to replacing layout height calculations with QFontMetrics::height() in the two note-list paint paths.

[zjeffer]

@nuttyartist another AI account that has the exact same issues as #769. What should we do with these?

Not run locally in this environment because the required Qt/CMake Windows toolchain is not installed here.

like seriously wtf