Refine zoom methods in `MainWindow` and font helpers
in `_style` to return `px_size` up the call chain and
log detailed zoom state on each change.
Deats,
- make `_set_qfont_px_size()` return `self.px_size`.
- make `configure_to_dpi()` and `_config_fonts_to_screen()`
return the new `px_size` up through the call chain.
- add `font_size` to `log.info()` in `zoom_in()`,
`zoom_out()`, and `reset_zoom()` alongside
`zoom_step` and `zoom_level(%)`.
- reformat `has_ctrl`/`_has_shift` bitwise checks and
key-match tuples to multiline style.
- comment out `Shift` modifier requirement for zoom
hotkeys (now `Ctrl`-only).
- comment out unused `mn_dpi` and `dpi` locals.
Also,
- convert all single-line docstrings to `'''` multiline
style across zoom and font methods.
- rewrap `configure_to_dpi()` docstring to 67 chars.
- move `from . import _style` to module-level import
in `_window.py`.
- drop unused `screen` binding in `boundingRect()`.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi
a32ffb75f2