refactor: trim profile input and use logical OR for consistency

Address CodeRabbit review feedback:
- Use logical OR (||) instead of nullish coalescing (??) to handle empty strings
- Trim profile input to handle accidental whitespace from CLI

This ensures more robust profile resolution when users provide input with
accidental leading/trailing spaces.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: hongkongkiwi

packages/cli-v3/src/commands/whoami.ts

@@ -74,7 +74,7 @@ export async function whoAmI(
   embedded: boolean = false,
   silent: boolean = false
 ): Promise<WhoAmIResult> {
-  const profileToUse = options?.profile ?? readAuthConfigCurrentProfileName();
+  const profileToUse = options?.profile?.trim() || readAuthConfigCurrentProfileName();
 
   if (!embedded) {
     intro(`Displaying your account details [${profileToUse}]`);