Add no-wallet Compare Pools view

[Sikkra]

Closes #11

Summary

• Adds a no-wallet Compare Pools view to desktop and mobile navigation.
• Shows common Blend assets across Etherfuse, Fixed, and YieldBlox with supply APY, borrow APY, 5x/10x net APY, c_factor, TVL, and utilization.
• Defaults sorting to Net APY 10x descending, supports sortable columns, and row-clicks preselect the pool/asset before returning toward Trade.

Verification

• npm run build (passes; existing Vite chunk-size warning remains)
• git diff --check
• npx tsc --noEmit (still fails on existing repo type/config issues: .ts import extension settings, AuthModalParams.network, and the main-branch demo reserve mock missing ReserveStats fields)
• Local Edge/Playwright fallback on http://127.0.0.1:5205/: Compare rendered without wallet, XLM rows for Etherfuse/Fixed/YieldBlox loaded from live pool data, default Net APY 10x sort was descending, Pool sort ordered rows alphabetically, clicking Fixed updated the Trade selection state, browser errors 0.

Note: the Codex in-app browser pane was unavailable in this session, so I used the local Edge/Playwright fallback for UI verification.