Always initialise new products as unpublished, unavailable, and unlisted by default

[mirekm]

We also want to drop the Availability panel from the product initialisation form as we don't see a real use case for it - you should set these all up once the product is created and fully configured later.

[changeset-bot]

🦋 Changeset detected

Latest commit: 1dfe552

The changes in this PR will be included in the next version bump.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.58%. Comparing base (b53b0d7) to head (1dfe552).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6306   +/-   ##
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  Coverage   42.58%   42.58%           
=======================================
  Files        2497     2497           
  Lines       43376    43372    -4     
  Branches    10233    10231    -2     
=======================================
  Hits        18470    18470           
+ Misses      24869    24865    -4     
  Partials       37       37           

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[Copilot]

Pull request overview

This PR changes the default availability settings for newly created products to be more conservative, ensuring products are not visible or purchasable until explicitly configured.

Changes:

• New products now default to unpublished, unavailable, and not visible in listings
• Channel listings are no longer set for products with variants during initial product creation (deferred until variants are created)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/channels/utils.ts	Updated default values in createChannelsData to set isPublished, isAvailableForPurchase, and visibleInListings to false instead of true
src/products/views/ProductCreate/handlers.ts	Removed channel listing updates for products with variants during creation, added explanatory comment
.changeset/humble-mice-wave.md	Added changeset documenting the behavioral change

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