fix(settings): resolve iPad menu text cropping and layout (#659)

[prince-0408]

Description

Fixes #659 where settings menu items (such as the installed keyboard list) displayed vertically cropped/squeezed text on iPad models (e.g. iPad Air 11-inch).

Screenshots

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Root Causes

1. Unremoved Hidden Constraints: When shortDescription was nil (e.g. for installed keyboard rows), descriptionLabel was hidden (isHidden = true) without being removed from the superview. Its Auto Layout constraints (TitleLabelPad.bottom + 8 → descriptionLabel.top and descriptionLabel.bottom → contentView.bottom - 16) remained active, forcing a minimum cell height of ~99pt.
2. Fixed iPhone Row Heights on iPad: Table view controllers returned fixed row heights (48.0pt) for cells without descriptions. Forcing TitleLabelPad inside 48pt crushed the label height down to ~8–12pt, causing severe top/bottom text cropping.
3. Stage Manager / Full-Screen Presentation: Modern iPadOS models run non-fullscreen apps in Stage Manager window frames by default unless full-screen presentation is configured.

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Key Changes Made

• InfoChildTableViewCell.swift:
  • Added descriptionLabel.removeFromSuperview() when shortDescription == nil. This breaks the active bottom constraint chain when no description is present, allowing single-line iPad cells to render at 66pt cleanly without vertical squishing.
• SettingsViewController.swift:
  • Updated tableView(_:heightForRowAt:) to return device-appropriate row heights (66.0pt base / 110.0pt with description on iPad, 48.0pt / 80.0pt on iPhone) with dynamic scaling support for the "Increase app text size" setting.
  • Implemented dynamic section header height calculation (heightForHeaderInSection) so section headers do not clip on iPad.
• AboutViewController.swift:
  • Updated tableView(_:heightForRowAt:) for iPad layout (72.0pt base / 110.0pt with description) and text size scaling.
• TableViewTemplateViewController.swift:
  • Updated tableView(_:heightForRowAt:) for iPad layout (66.0pt base row height) and font scale support.
• SelectionViewTemplateViewController.swift:
  • Implemented tableView(_:heightForRowAt:) returning 66.0pt for iPad RadioTableViewCell items with text size scaling support.
• Info.plist:
  • Added <key>UIRequiresFullScreen</key><true/> so the app requests full-screen presentation mode on iPad.

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CC: @andrewtavis @henrikth93

[github-actions]

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[github-actions]

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The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

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[github-actions]

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[andrewtavis]

Thanks so much for the PR, @prince-0408! @henrikth93, can you take an initial look?