Manual-Price Product Bundles to upsell more bundles

Let tenants create bundle SKUs that group existing products and assign a fixed bundle price (must be < sum of the components). Display crossed-out list price versus bundle price to highlight the saving.

Admin flow
• New Bundles tab. Select items + qty, enter bundle price, system shows € and % saved.
• Validation: bundle price may not exceed component total; stock tracked per SKU.

Storefront UX
• Bundle tile shows list price (€100) → bundle price (€80) with “Save 20%” badge.
• In cart/checkout the bundle is a single line; items split only for fulfilment.

Acceptance
Admin can create, edit, and delete bundles with any valid price.
Shoppers see the savings badge and correct bundle price immediately after login.
Checkout, invoicing, and reporting honour bundle pricing.

Benefit
Explicit discounts drive upsell and raise average order value.

Impact
Minor DB change, bundle-pricing logic, UI badges, i18n strings, test coverage.

Consolidated into: Products with variations