[vrtmrz]

Fixes the Restore from Backup revision selector extending into mobile safe areas and losing Obsidian's native content spacing.

Changes

• Mount the selector in Obsidian's standard modal content area, preserving native padding, the title, and the Close control.
• Reserve mobile safe areas and keyboard space, and let search inputs and revision columns fit the available width.
• Add real-Obsidian regression coverage for portrait, landscape, simulated keyboard height, native content spacing, horizontal overflow, touch targets, and native Close behaviour.

Verification

• The new assertions reproduced the original safe-area overlap (23.5px at the top and 10.5px at the bottom), missing native padding, and list overflow before the corresponding fixes; they pass afterwards.
• Real Obsidian 1.12.7 on Linux arm64 under Xvfb: selector/restore-confirmation and mirror-delete-semantics E2E passed.
• Restore selector UI tests: 8 passed with one worker.
• Production build, E2E TypeScript check, formatting, and git diff --check passed.
• Community lint: 0 errors and 49 existing warnings; the build retains the existing Svelte initialItems warning.
• Build behaviour verified by the maintainer.