Add conditional logging for development, improve token refresh logic, and remove outdated comments

- Wrap `console.log` calls in `if (process.env.NODE_ENV === 'development')` to prevent production logs in `forms/page.tsx`.
- Refactor token refresh logic by relying solely on the `refreshPromise` to avoid race conditions.
- Remove outdated `isRefreshing` flag, utilizing `refreshPromise` as the primary lock.
- Update comments in `IMPLEMENTATION_PLAN.md` to reflect the current progress and eliminate redundant sections.

frontend/tests/components/forms/FormField.test.tsx

@@ -246,7 +246,6 @@ describe('FormField', () => {
         render(
           <FormField
             label="Email"
-            // @ts-expect-error - Testing missing name
             name={undefined}
           />
         );