[Woo POS][Historical Orders] Add refund data to model and screen

[kidinov]

WOOMOB-1533

Description

Adds refund information to the historical orders details screen in Woo POS. The order details now display individual refund line items and calculate net payment (total paid minus refunds).

Changes:

• Added WooPosGetOrderRefundsByOrderId utility to fetch refund data for orders
• Updated OrderDetailsViewState.TotalsBreakdown to include refunds list and net payment
• Modified WooPosOrdersViewModel to fetch and format refund amounts
• Updated WooPosOrderDetails UI to display refunds and net payment sections
• Added string resources for "Refunded" and "Net Payment" labels

Note: The UI layout is not final and will be refined in subsequent iterations.

Steps to reproduce

1. Open Woo POS
2. Navigate to Historical Orders
3. Select an order that has refunds
4. Observe the order details screen showing:
   • Total paid with payment method
   • Individual refund line items (if any)
   • Net payment calculation (if refunds exist)

Testing information

• Verified orders without refunds display correctly (no refund section shown)
• Verified orders with single refund show refund amount and net payment
• Verified orders with multiple refunds show all refunds separately
• Confirmed refund amounts are formatted with negative signs
• Confirmed net payment calculation is correct (total - sum of refunds)

Images/gif

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	8b8420a
	Direct Download	woocommerce-wear-prototype-build-pr14779-8b8420a.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	8b8420a
	Direct Download	woocommerce-prototype-build-pr14779-8b8420a.apk

[toupper]

Please consider to add tests to this one if necessary

[kidinov]

Done!

8b8420a

[toupper]

Great work @kidinov! LGTM 🚢

[codecov-commenter]

Codecov Report

❌ Patch coverage is 24.54545% with 83 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.03%. Comparing base (4222251) to head (8b8420a).
⚠️ Report is 98 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...ce/android/ui/woopos/orders/WooPosOrdersDetails.kt	0.00%	81 Missing ⚠️
.../android/ui/woopos/orders/WooPosOrdersViewModel.kt	90.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk   #14779      +/-   ##
============================================
- Coverage     38.04%   38.03%   -0.02%     
- Complexity     9994    10000       +6     
============================================
  Files          2120     2121       +1     
  Lines        119437   119505      +68     
  Branches      16249    16259      +10     
============================================
+ Hits          45445    45451       +6     
- Misses        69406    69468      +62     
  Partials       4586     4586              

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