- Introduced `arc76-bitcoin` for deterministic account derivation for Bitcoin (native SegWit / bech32 addresses).
- Introduced `arc76-bitcoincash` for deterministic account derivation for Bitcoin Cash (CashAddr addresses).
- Introduced `arc76-ethereum` for deterministic account derivation for Ethereum and EVM-compatible chains.
- Introduced `arc76-solana` for deterministic account derivation for Solana.
- Added shared `arc76-core` package for PBKDF2-HMAC-SHA256 seed derivation used by all chain-specific packages.
- Implemented tests for each package to ensure cross-language compatibility with known-answer values.
- Updated README files for each package with usage instructions and security warnings.

fix: merge hops across all legs in combined route response

combineRouteResponse() correctly summed outputAmount/totalNetworkFeeMicroAlgos
and concatenated txsToSign across every leg of a v2 combined split, but only
spread routes[0]?.route for everything else - so the displayed hops array
silently reflected just the first leg. A multi-leg swap could show e.g. 16
transactions to sign but only 2 hops, since the other legs' hops were dropped
even though their transactions were included and their output was counted.

Root-caused and verified against BiatecRouter's own snapshot test
infrastructure (RouterServiceMultiLegHopsTests) - the router's API response
was already complete per-leg, confirming the gap was purely in this display
merge.

- Added support for ARC-60 (Algorand Wallet Arbitrary Signing API) to enable signing of arbitrary data requests.
- Introduced new components and Vuex store actions to handle signData requests and signatures.
- Updated localization files to include new ARC-60 related strings in multiple languages.
- Enhanced the Connect page to display and manage signData requests alongside existing WalletConnect requests.
- Implemented domain validation for authenticator data to ensure security during signing operations.

combineRouteResponse() correctly summed outputAmount/totalNetworkFeeMicroAlgos
and concatenated txsToSign across every leg of a v2 combined split, but only
spread routes[0]?.route for everything else - so the displayed hops array
silently reflected just the first leg. A multi-leg swap could show e.g. 16
transactions to sign but only 2 hops, since the other legs' hops were dropped
even though their transactions were included and their output was counted.

Root-caused and verified against BiatecRouter's own snapshot test
infrastructure (RouterServiceMultiLegHopsTests) - the router's API response
was already complete per-leg, confirming the gap was purely in this display
merge.

- Updated GitHub Actions workflows to pin actions to specific commit SHAs for improved stability.
- Added critical documentation clarifications regarding key sharing across chains in README and AI_INTEGRATION files.
- Implemented password length enforcement in Arc76Seed, ensuring a minimum of 16 characters.
- Fixed encoding issues in salt generation to use UTF-8 consistently, addressing critical audit findings.
- Added regression tests for slot handling and password validation to ensure deterministic behavior.
- Updated dependency references in .NET projects to mitigate known vulnerabilities.
- Documented memory management trade-offs in ARC76Signer class to inform users of potential risks.
- Enhanced test coverage for slot variations across all chain packages in both .NET and TypeScript.