v1.63 — Contrast test, dark-mode polish, new icons, loading and empty states, category names on items

• Stats bars no longer cut off long category names or big amounts on a phone
• In dark mode, menus cast a visible shadow, and the phone's status bar turns dark too
• A fresh app icon, with a proper home-screen icon on iPhone
• While a page loads you see a faint outline of what's coming instead of "Loading…"
• Empty screens say what to do next, with a button to do it
• A bill's items show their category's name, under each item or grouped by category with subtotals (Settings > Layout)
• Subscriptions show their category's name too
• The date at the bottom of a printed recap is dark enough to read

Merged in #63 on 2026-09-29.