fix(swap): normalize wallet addresses to lowercase before API call

Ensures from_address and multi-swap accounts are lowercased at the CLI
boundary to prevent case-sensitivity issues on the API side.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/commands/swap.ts

@@ -41,7 +41,7 @@ export function registerSwapCommands(program: Command): void {
       if (opts.percent != null) validatePercent(opts.percent);
       const params: SwapParams = {
         chain: opts.chain,
-        from_address: opts.from,
+        from_address: opts.from.toLowerCase(),
         input_token: opts.inputToken,
         output_token: opts.outputToken,
         input_amount: opts.percent != null ? (opts.amount ?? "0") : opts.amount,
@@ -109,7 +109,7 @@ export function registerSwapCommands(program: Command): void {
       }
       const params: MultiSwapParams = {
         chain: opts.chain,
-        accounts,
+        accounts: accounts.map((a: string) => a.toLowerCase()),
         input_token: opts.inputToken,
         output_token: opts.outputToken,
       };