fix(frontend): reject mixed Solana WC reviews

[cursor]

Motivation

A malicious Solana WalletConnect request could include a decoded, benign-looking transfer plus an additional unreviewed instruction. The review summary displayed only the decoded movement, while approval still signed the full transaction, making hidden fund-moving effects possible.

Changes

• Treat Solana WalletConnect transaction messages that mix reviewed fund movement with unreviewed instructions as ambiguous.
• Keep wholly unreviewed transactions on the existing warning path instead of inventing an incomplete summary.
• Add regression coverage for reviewed-then-unreviewed and unreviewed-then-reviewed instruction ordering.

Tests

• npm run test -- src/frontend/src/tests/sol/utils/sol-transactions.utils.spec.ts src/frontend/src/tests/sol/services/wallet-connect.services.spec.ts
• npm run format
• npm run lint -- --max-warnings 0
• npm run check
• npm run test
• npm run check:tests
• npm run lint:lockfile