Introduces an exportOrdersToCSV function in lib/api-client.ts to allow exporting orders by status as a CSV file. Updates various UI components to use the '•' (bullet) symbol instead of '·' (middle dot) and replaces some emoji/unicode characters for improved consistency and compatibility. Also normalizes the 'use client' directive to include a BOM in many files.
Introduces promotion-related fields to the Order interface and displays promotion discounts in both the order details and order table. Adds a PromotionDetailsModal component for viewing detailed promotion analytics and eligibility, and integrates it into the PromotionsList with a new 'view details' action.
