Add multi-chain vault browsing

[Seranged]

Summary

• Adds multi-chain vault browsing so users can select several supported chains and scan lend, borrow, earn, and explore surfaces together.
• Keeps detail and transaction flows anchored to a current chain while list/catalog views can aggregate selected chains.
• Preserves chain-specific label, registry, category, and refresh state to avoid cross-chain address collisions.

Changes

• Adds selected-chain state, URL/localStorage sync for networks, and a multi-select chain picker in the header.
• Loads labels and vault registries per chain, then merges catalogue data for browsing while retaining chain-scoped cache keys.
• Adds chain filters and chain indicators across vault lists, borrow pairs, and vault detail headers.
• Makes periodic refresh, escrow discovery, unresolved collateral lookup, and unknown-vault resolution chain-aware.

Test plan

• npm run typecheck
• npm run test:run
• git diff --check origin/development...HEAD

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/lite-242-add-multi-chain-support-with-the-connected-chain-abstracted

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[railway-app]

🚅 Deployed to the euler-lite-pr-619 environment in euler-lite

Service	Status	Web	Updated (UTC)
dev-build	✅ Success (View Logs)	Web	Jun 25, 2026 at 10:56 am