[WOOMOB-2274] Fix order detail shimmer loading screen to match loaded layout

[malinajirka]

Fixes WOOMOB-2274

Description

Updates the POS order detail shimmer loading screen to match the actual loaded order detail layout. The header structure now mirrors WooPosOrderDetails — action shimmer sits in a toolbar-height row at the top, with date/email/status shimmer below. In single-order mode (from bookings), the order number shimmer is hidden and the excessive top padding is removed so the action shimmer aligns with the toolbar. Totals card spacing is also updated to match the loaded state.

Test Steps

1. Open POS
2. Go to Bookings tab, select a booking, tap "View Order"
3. Observe the shimmer loading screen — the action button shimmer should appear at the top (toolbar level), and the overall layout should closely match the loaded order detail
4. Also verify the orders list shimmer still looks correct when opening the Orders tab (you might need to add delay to loading orders or just check out the video I shared)

Images/gif

Screen.Recording.2026-02-20.at.9.55.44.mov

• 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 Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Build Number	727
	Version	24.1-rc-3
	Application ID	com.woocommerce.android.prealpha
	Commit	c89a120
	Installation URL	0n5to96bq755o

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.29%. Comparing base (ab7c42b) to head (1bf5f23).

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk   #15397   +/-   ##
=========================================
  Coverage     39.29%   39.29%           
  Complexity    10977    10977           
=========================================
  Files          2238     2238           
  Lines        127540   127540           
  Branches      17802    17802           
=========================================
+ Hits          50113    50116    +3     
+ Misses        72318    72316    -2     
+ Partials       5109     5108    -1     

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[kidinov]

LGTM!

I would just maybe consider hiding "Order #" behind shimmer as well, as we kinda of loading order number. Btw do we need to load it or we have the order id already?