TestMode: expandable options with formatting, animations, and UX improvements - Center test cards vertically on larger screens; scrollable on small viewports (iPhone SE) - Add expand/collapse for truncated options (>100 chars) with Show more/Show less link - Larger tap target (44px) and edge-to-edge separator for Show more link - Preserve HTML formatting (bold, italic, br) and decode entities (nbsp) - Smooth expand/collapse animation with bottom fade for expandable items - Add chevron icon. Allow expand/collapse after answer given - Add showMore translation (en/de) Fix: show visible checkmark in Manage deck card selection checkboxes Add custom checkbox styling to CardCheckbox since global appearance:none hides native checkboxes. Draw checkmark via ::after pseudo-element when checked, with dark mode and hover support.

Deck actions- Each deck now has three actions: Study, Test, and Insights (not only Study). Insights shows progress and wrong answers; back button returns to “My decks” when you opened it from the list, or to the deck when you opened it from the deck.Study & cards- For long content that doesn’t fit the card: an overall scroller was added and a bottom fade to the edge so you can scroll the full question or answer; layout and scroll work correctly on iPhone. Short content stays centered.- Test mode: completion screen width adjusted; header and footer stay fixed while you scroll. Navigation & lists- My decks: “Created …” dates are fully translated and show in days or months.- Referrals: "My referrals" was added so you can invite others and see their status; on small screens long emails now truncate and no longer overlap the label. General fixes- Bottom navigation and sheets respect safe area with a cleaner look.- Password reset: reset links from email open in the app and complete reliably. - Create menu: choosing any option (manual entry, AI, document, CSV, etc.) now scrolls the new screen to the top.- Create and Share bottom sheets use less space at the bottom on iPhone.