Improve address book account search performance

[piatoss3612]

Summary

• Load My account keys once when the address book modal opens, then filter account names and displayed addresses locally as the user types.
• Clear cached account rows when the modal is closed or a new account fetch starts so stale rows from a previous chain cannot be selected while the new fetch is pending.
• Constrain background keyring bech32 address search to recognized address-prefix inputs such as cosmos1...; name-like queries such as dev or broad chain-prefix-only queries such as cosmos no longer trigger expensive per-wallet address scans.

Root Cause

The My account tab was sending a background search request after each debounced search update. For non-hex text of length 3 or more, the shared keyring search could also treat broad strings as bech32 address substring searches and scan Cosmos/Ethermint addresses across wallets. That made simple wallet-name searches feel delayed even with a small number of accounts.

User Impact

Wallet name search, hex address search, and explicit bech32 address-prefix search such as cosmos1... continue to work. The intentionally narrowed behavior is that a bare chain prefix like cosmos is treated as text/name search, not as an address search that matches every Cosmos address.

Validation

• yarn workspace @keplr-wallet/background test src/keyring/service.spec.ts --runInBand
• yarn workspace @keplr-wallet/background typecheck
• yarn workspace @keplr-wallet/extension typecheck
• yarn prettier --check packages/background/src/keyring/service.ts packages/background/src/keyring/service.spec.ts apps/extension/src/components/address-book-modal/index.tsx
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
keplr-wallet-extension	Ready	Preview, Comment	Jun 1, 2026 8:10am

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