feat: add Pine Labs EDC integration and WhatsApp conversational ordering

feat: replace order type dropdown with segmented buttons, default takeaway, mandatory delivery phone+address

feat: add Swiggy/Zomato integration with webhook infrastructure, online order management, and platform config

feat: add thermal printer management with routing rules and print bill button

feat: add dedicated Order Summary page with filters, pagination, detail modal

feat: add print settings tab + fix cleaning table color consistency

feat: add KOT History drawer to KDS for traceability and reverification

feat: KDS side pane split by Dining/Takeaway/Delivery with source badges on cards

feat: redesign KDS with item-level food-ready, order grouping, and pending side pane

feat: make all pages mobile-responsive

Initial commit: HSS POS restaurant management system