fix(settings): align hotkey columns, widen slider rows, one-line hints

[kirillDevPro]

What & why

A live UI audit of the Settings window at a maximized 2560-wide window found six readability defects:

• Hotkeys: every key editor sat at the far right edge, ~1300 px away from the action it binds.
• Interface / Lines: slider rows were a bare 180 px track with no scale, no unit and a loose value.
• Interface: the chart-label size slider showed -1.50 with nothing saying it is a pixel delta.
• General: «Закрывать через, сек … 180 сек» and «Хранить лог, дней … 14 дн.» repeated the unit.
• General: hints ran to four-line paragraphs under each option.
• Lines: the «Общее» block's labels were the only lowercase ones in the window.

Fixes, all inside settings/** and the three locale files (ru/en/es):

• Hotkeys rows get a fixed title column and a capped description column, so the editors line up in one column beside the text and wrap instead of clipping on a narrow window.
• The shared slider_row takes the field's range and a formatter: a wider track, min/max captions under it, and a right-aligned value with its unit (85%, 1.0 px).
• The label-size slider is labelled as an adjustment in px and renders its value with a sign (-1.5 px).
• The duplicated units are dropped from the two General labels; the steppers keep them.
• A multi-sentence hint shows its first sentence with … and the full text in a tooltip; the locale strings are unchanged.
• The Lines «Общее» labels are capitalized. The English line names on that tab stay untranslated per locales/README.md.

One static contract (theme_contract::analytics) pinned the old hint(&t!(...)) call shape and was updated to the new one; it still asserts the valuation hint key is rendered.

How to verify

• cargo test --workspace (the theme_contract target covers the updated pin).
• Run the debug build, open Настройки and compare the Хоткеи, Интерфейс, Линии and Общие tabs with the list above; hover a long General hint for the tooltip.

https://claude.ai/code/session_01HEP2jThagma91nvSCfgsdZ