Show a processing empty state while a CSV company card import is still running

[allgandalf]

Explanation of Change

CSV imports are async, the uploaded file takes ~90s to reach the scrapers, so until then the feed read returns nothing and the table says No cards in this feed while the import is still running. Auth now stamps importStartedAt on the feed (Auth #23237) and this swaps the empty state copy and illustration while that stamp is set and the feed has no cards.

Gating on the card list being empty means it clears as soon as cards land, and Auth drops the marker at that same point. No timers and no fixed window on the client. A CSV that parses to zero cards keeps showing the state, there is no completion signal to clear it on yet.

cc @Expensify/design, copy and illustration are from Jon's mocks.

Fixed Issues

$ #88496
PROPOSAL: #88496 (comment)

Tests

1. Go to Workspace > Company cards > Add cards
2. Pick United States > Direct feed > Import transactions from file, name the layout and continue
3. Upload a valid CSV, map Account number to Card number, click Import
4. Verify the table shows Cards will appear in a moment... with the card reconciliation illustration, not No cards in this feed
5. Wait for the cards to land and reopen the feed, verify the normal card table renders
6. Open a workspace whose feed has no cards and was never imported, verify it still shows No cards in this feed

• Verify that no errors appear in the JS console

Offline tests

The import itself needs a connection. Once the stamp is in Onyx the empty state is derived locally, so it keeps showing while offline until a feed read clears the stamp.

QA Steps

Same as tests.

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

[melvin-bot]

Hey, I noticed you changed src/languages/en.ts in a PR from a fork. For security reasons, translations are not generated automatically for PRs from forks.

If you want to automatically generate translations for other locales, an Expensify employee will have to:

1. Look at the code and make sure there are no malicious changes.
2. Run the Generate static translations GitHub workflow. If you have write access and the K2 extension, you can simply click: [this button]

Alternatively, if you are an external contributor, you can run the translation script locally with your own OpenAI API key. To learn more, try running:

npx ts-node ./scripts/generateTranslations.ts --help

Typically, you'd want to translate only what you changed by running npx ts-node ./scripts/generateTranslations.ts --compare-ref main

[allgandalf]

closing in favour of App #97175, which does the same importing state frontend only and is further along. left the design illustration and copy from 88496 as a comment over there