Show post-loop projected rates

[Sikkra]

Summary

• Returns projected utilization and projected pool totals from projectRates.
• Labels the leverage preview as current net APY vs projected APY after the deposit/change.
• Shows pool utilization before and after the proposed loop size.
• Aligns the frontend kink math with reserve max_util and updates the Rust simulator net APY rows to use post-loop rates.
• Keeps frontend typecheck working by enabling .ts imports and removing stale wallet modal params.

Verification

• npm run build
• npx tsc --noEmit
• git diff --check
• cargo build --bin simulate with CARGO_NET_GIT_FETCH_WITH_CLI=true and short Cargo paths after enabling git config --global core.longpaths true; build passed with one pre-existing dead-code warning for EmissionData.expiration.
• Browser check on http://127.0.0.1:5196: accepted disclaimer, opened demo mode, verified current/projected APY and pool utilization render, verified values update after changing amount/leverage inputs, and current-page console logs contain no warnings/errors.

Closes #33