[js-client] Add tsc --noEmit to the js client test script and fix type error

[samkim-crypto]

Problem

If we current run pnpm tsc --noEmit on the js client, we get the following error:

test/_setup.ts:92:50 - error TS2345: Argument of type 'FullySignedTransaction & TransactionWithinSizeLimit & Readonly<{ messageBytes: TransactionMessageBytes; signatures: SignaturesMap; }> & TransactionWithLifetime' is not assignable to parameter of type 'FullySignedTransaction & TransactionWithinSizeLimit & Readonly<{ messageBytes: TransactionMessageBytes; signatures: SignaturesMap; }> & Omit<...> & { ...; }'.
  Type 'FullySignedTransaction & TransactionWithinSizeLimit & Readonly<{ messageBytes: TransactionMessageBytes; signatures: SignaturesMap; }> & TransactionWithLifetime' is not assignable to type '{ lifetimeConstraint: Omit<TransactionBlockhashLifetime, "blockhash">; }'.
    Types of property 'lifetimeConstraint' are incompatible.
      Type 'TransactionBlockhashLifetime | TransactionDurableNonceLifetime' is not assignable to type 'Omit<TransactionBlockhashLifetime, "blockhash">'.
        Property 'lastValidBlockHeight' is missing in type 'TransactionDurableNonceLifetime' but required in type 'Omit<TransactionBlockhashLifetime, "blockhash">'.

92   await sendAndConfirmTransactionFactory(client)(signedTransaction, {
                                                    ~~~~~~~~~~~~~~~~~

  node_modules/.pnpm/@solana+transactions@4.0.0_fastestsmallesttextencoderdecoder@1.0.22_typescript@5.9.3/node_modules/@solana/transactions/dist/types/lifetime.d.ts:25:5
    25     lastValidBlockHeight: Slot;
           ~~~~~~~~~~~~~~~~~~~~
    'lastValidBlockHeight' is declared here.


Found 1 error in test/_setup.ts:92

My understanding is that the sendAndConfirmTransactionFactory strictly requires a TransactionBlockhashLifetime. However, assertIsSendableTransaction types the variable as a FullySignedTransaction union, causing a type mismatch since the factory cannot handle nonce-based expiration.

Summary of Changes

I added assertIsTransactionWithBlockhashLifetime in test/_setup.ts to explicitly narrow the transaction type to one using a blockhash.

I updated the test script in package.json to run tsc --noEmit before ava to ensure test files are type-checked during builds/tests.

[grod220]

LGTM