test(ui): add programmatic UI audit tooling
scripts/ui-audit.js — laedt die App, schaltet pro Tab DE<->EN und
diffed sichtbaren Text (findet hardcoded/untranslated Strings), prueft
Horizontal-Overflow, Zero-size-Interactives, Off-screen-Elemente.
scripts/ui-audit-modals.js — gleiche Checks fuer Modals (Trim-Dialog,
Template-Guide, Command-Palette) inkl. Viewport-Clipping-Check bei
min-height.
Intensive Verifikation 5.0.14: 0 Localization-Leaks ueber alle Tabs +
Modals, 0 Layout-Overflows, alle Modals fit viewport (auch @700px
min-height), Button-Alignment 0px spread (xqc/papaplatte/xrohat),
empty-states + 1200/1280/1920px + alle 5 Themes sauber.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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