How do I configure regional store views for Zurich vs Geneva vs Ticino?

Pure-language store-views work for most Swiss stores, but for stores with strong regional brands (e.g. luxury watches with Zürich vs Geneva flagship boutiques) we sometimes layer a region dimension on top:

• Default Swiss store: 4 store-views (DE / FR / IT / EN), one CHF price-list, MWST 8.1%.
• Region overlays via customer_segment or store_group: Zürich-default sees the Zürich boutique address + DE; Geneva-default sees the Geneva boutique address + FR; Ticino-default sees the Lugano boutique address + IT.
• Click-and-collect: per-region pickup-point modules so a Geneva shopper sees Geneva pickup options first.
• Hreflang: de-CH, fr-CH, it-CH, en-CH at minimum — we don’t fragment further by canton (Google treats CH-DE as one regional target regardless of which canton).