Closes #344 ## What was implemented ### Commit 1 — `feat(nav): add cursor-pointer and tooltip to notification bell` - Extracted `bellLabel` as `$derived` in `NotificationBell.svelte` — eliminates the duplicated inline ternary and keeps tooltip/label in sync reactively - Added `title={bellLabel}` to the bell `<button>` — native tooltip mirrors `aria-label` in both zero and non-zero unread states - Added `cursor-pointer` to the bell button's class list - Added global `button { cursor: pointer; }` rule in `@layer base` of `layout.css` — prevents future regressions (global scope per Decision Queue) - Added 3 component tests in `NotificationBell.svelte.spec.ts`: cursor-pointer class present, title equals aria-label when unread=0, title equals aria-label when unread=3 ### Commit 2 — `fix(nav): replace hardcoded ThemeToggle title with Paraglide i18n keys` - Added `theme_toggle_to_light` / `theme_toggle_to_dark` keys to `de/en/es` messages - Extracted `themeLabel` as `$derived` in `ThemeToggle.svelte` and bound both `aria-label` and `title` to it - Fixes the pre-existing hardcoded English strings (`'light mode'` / `'dark mode'`) per Decision Queue resolution Touch target size was descoped per the Decision Queue. ## Decision Queue resolutions (from issue #344) - **cursor-pointer scope**: global via `@layer base` ✅ - **ThemeToggle scope**: fixed in this issue ✅ - **Touch target**: descoped ✅ ## Test results All 5 `NotificationBell` tests pass. Co-authored-by: Marcel <marcel@familienarchiv> Reviewed-on: http://heim-nas:3005/marcel/familienarchiv/pulls/351