fix: Implement lazy Split Request preview

[paultsimura]

Details

When creating a split request in a room, the transaction data is not loaded after relogin. We want to show the request details instead of the skeleton, therefore fetch the transaction data from the reportAction.originalMessage.

Fixed Issues

$ #33766
PROPOSAL: #33766 (comment)

Tests

Same as QA

Offline tests

Same as QA

QA Steps

1. Create a Workspace with a few members
2. Open the announce room of the workspace
3. Make a split bill with all members
4. Relogin
5. Navigate to the announce room and locate the created split request

• Verify the request details are displayed instead of the loading skeleton

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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

MacOS: Desktop

[paultsimura]

@allroundexperts @Gonals The preview works as expected, but I have a couple of concerns here:

First (rather minor concern): the reportAction.originalMessage doesn't store the merchant – it should be added on the BE if we want to show it on the lazy loaded preview.

Second, from what I found, these Split requests can be posted into a room directly, without wrapping it into an IOU Report. Therefore, there is currently no mechanism to fetch the transaction from BE after a Split was created (as they usually get loaded by OpenReport API call on the IOU or Expense Report). As a result, we:

1. Cannot show the Split Details (should keep the Split preview non-clickable);
2. Such Split requests cannot be modified (they almost cannot be modified anyway, only when created with empty required fields);

• Should we do nothing and keep such split requests non-clickable, since there is no way to fetch the Split transaction (the underlying 1:1 transactions will be loaded and can be reimbursed correctly)?
• Should we show the split details drawer with available lazy data (it's currently missing merchant, category, tag, and receipt-related fields)?
• Should we think of adding an API route to allow fetching transactions by IDs from BE, so when a user clicks on the split preview, and the transaction's missing, we'll first fetch it from the BE, similar to what we do with the OpenReport calls?

[paultsimura]

Also tagging @mountiny as you might be interested since you've been involved in other lazy-loading issues: #34221 (comment)

[mountiny]

@paultsimura can you bring this to Slack please, this is better discussed there, thnanks!