[GOOWOO-453] Fix meta-boxes JS only on WC Edit Order screen

[jamesmorrison]

Changes proposed in this Pull Request:

Closes https://linear.app/a8c/issue/GOOWOO-453/load-meta-boxes-js-asset-in-the-wc-edit-order-page-only

Screenshots:

Detailed test instructions:

1. Open WP admin, navigate to WooCommerce -> Settings -> Advanced -> Features
2. Confirm / set "Order data storage" is "High-performance order storage"
3. Navigate to WooCommerce -> Home
4. Open the inspector, confirm you do NOT see "Google for WooCommerce: meta-boxes script loaded"
5. Navigate to WooCommerce -> Orders and select an order (create one if need be)
6. Open the inspector, confirm you DO see "Google for WooCommerce: meta-boxes script loaded"
7. Navigate to WooCommerce -> Settings -> Advanced -> Features
8. Set "Order data storage" to "WordPress posts storage"
9. Navigate to WooCommerce -> Home
10. Open the inspector, confirm you do NOT see "Google for WooCommerce: meta-boxes script loaded"
11. Navigate to WooCommerce -> Orders and select an order (create one if need be)
12. Open the inspector, confirm you DO see "Google for WooCommerce: meta-boxes script loaded"

Additional details:

Add - Added new JS file for meta boxes; conditionally enqueued on the edit order page.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.7%. Comparing base (6ffb44b) to head (4d403ae).
⚠️ Report is 4 commits behind head on feature/in-product-placements.

Files with missing lines	Patch %	Lines
src/Admin/Admin.php	0.0%	6 Missing ⚠️

Additional details and impacted files

@@                        Coverage Diff                        @@
##             feature/in-product-placements   #3291     +/-   ##
=================================================================
- Coverage                             66.7%   66.7%   -0.0%     
- Complexity                            5192    5193      +1     
=================================================================
  Files                                  888     888             
  Lines                                26803   26804      +1     
  Branches                              1562    1562             
=================================================================
  Hits                                 17875   17875             
- Misses                                8728    8729      +1     
  Partials                               200     200             

Flag	Coverage Δ
js-unit-tests	66.3% <ø> (ø)
php-unit-tests	66.8% <0.0%> (-<0.1%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/Admin/Admin.php	0.0% <0.0%> (ø)

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[ankitguptaindia]

QA Status: Approved ✅

Environment

• WordPress: 7.0-beta4-61946
• PHP: 8.3.23
• Server: nginx/1.26.1
• Database: mysqli (Server: 8.0.35 / Client: mysqlnd 8.3.23)
• Browser: Chrome 144.0.0.0
• OS: macOS
• Theme: Twenty Twenty-Five 1.4
• MU Plugins: None activated
• Plugins:
  • Force GLA Billing Status to Approved 1.0
  • Google for WooCommerce 3.5.3
  • WooCommerce 10.6.1

Test result:

Tested the scenario with both High-Performance Order Storage (HPOS) and WordPress posts storage enabled.

Results confirm that the meta-boxes script (Google for WooCommerce: meta-boxes script loaded) loads only on the Order Edit screen, and does not load on other admin pages such as WooCommerce → Home.

This behaviour was consistent in both storage modes:

• HPOS enabled
• WordPress posts storage enabled

With WordPress posts storage table:

Recording.1738.mp4

High-performance order storage:

Recording.1739.mp4