feat: add product deletion UI and wire up Products.delete_product/1

[z3ugma]

Summary

Products can be created and renamed (via the context layer), but there is no way to delete a product from the UI or API. The Acai.Products.delete_product/1 function exists in the context module but is not wired to any LiveView, controller, or API endpoint.

Current state

• Acai.Products.delete_product/1 at lib/acai/products/products.ex:63 performs Repo.delete(product) and has a unit test
• The function is called nowhere — no LiveView event handler, no API controller, no button in any template
• product_live.ex only renders the feature-completion matrix; there is no settings/danger zone UI for products
• team_settings_live.ex handles team deletion (which cascade-deletes products), but there's no per-product delete flow
• No feature spec exists for product settings or product deletion

What needs to be built

1. Feature spec — Create features/site/product-settings.feature.yaml defining the product deletion workflow (confirm-by-typing-name modal, cascade warning, redirect behavior)

2. UI — Either:

   • A settings page at /t/:team_name/p/:product_name/settings, OR
   • A delete button + modal within the existing product view

   The modal should:

   • Warn that deletion is permanent and cascade-deletes all associated implementations, specs, requirements, and feature states
   • Require the user to type the product name to confirm
   • Disable the confirm button until the typed name matches exactly
   • On confirmation, call Products.delete_product/1 and redirect to /t/:team_name

3. API endpoint (optional) — A DELETE /api/v1/products/:product_name endpoint for programmatic deletion, if desired

4. Authorisation — Product deletion should respect the team's permission model (only users with appropriate role/scope can delete)

[Atmosfearful]

Thanks for opening the issue and the detailed description.

there is no way to delete a product from the UI or API

From the user's perspective at least, the product should be deleted (no longer appear in the side panel) when all specs have been removed via Feature Settings -> Delete Spec. Let me know if you encounter a reproducible situation where the product is still visible in the UI or the API/CLI even after child specs were deleted.

Tangentially, the ON DELETE CASCADE logic also covers product deletion when the parent team is deleted.

So while the UI/UX is technically 'acceptable' as far as I can tell, there are still open questions for me to look into;

• Are product entities stranded (invisible but still present in db) or did we already implement application logic to cover cleanup? I can't recall off the top of my head.
• What to do about those unused methods in application code (clean up, or expose to user)

[z3ugma]

look at https://app.acai.sh/t/fred/p/pi-gui @Atmosfearful in the hosted production app - account kamogi5440 (at) kynninc.com

there are no specs remaining for pi-gui
yet I can see a route for it with a sidebar

No features found
This product doesn't have any feature specs yet. Add specs to see the completion matrix.