Quantframe v1.6.31

Fixes

• 🛠️ Fixed trade processing handling every item twice (the wish-list/stock handler plus a duplicate handle_item call), which created duplicate stock entries and transactions. Purchases now reliably land in stock, including purchased wish-list items.
• 🛠️ Fixed an issue where the trading analytics will turn gray.

Refactors

• ♻️ Removed unused imports and dead code across the Rust workspace, so cargo check runs without warnings.
• ♻️ Analytics now reliably reports shutdown: the app_exit event is tracked and flushed on RunEvent::ExitRequested (previously the app was killed before the queue flushed), and the Warframe Market client's per-route API call counts are reported as wfm_api_tracking events on exit.
• ♻️ Moved the riven price model into the cache module structure (cache::modules::riven_pricer and cache::types::riven::riven_price), matching the other cache modules.
• ♻️ Replaced the interval button CSS modules with inline Mantine styles and removed the now-unused stylesheets.