fix(tagging): fix downloading links with tags

[halfwhole]

Problem

To reproduce:

1. Search by tags on the user page
2. Click on "Download links"

Observed behaviour: downloaded links do not reflect the URLs searched by tags in the links table

Expected behaviour: downloaded links should reflect the URLs searched by tags in the links table

The bug happens because the function getUrls (used by the downloader) is unable to differentiate between searching by links vs searching by tags, and incorrectly always searches by links. This is unlike getUrlsForUser (used by the search bar), which has some extra added logic to differentiate between the two.

See Notion issue

Solution

Instead of mimicking the extra logic from getUrlsForUser in getUrls to differentiate between searching by links vs. by tags, this PR refactors the redux store such that this logic is no longer necessary. For context, searchText in the redux store is currently being overloaded for use in both searching by links and searching by tags. This PR refactors it by splitting it out into separate fields searchText and tags, which is better because it is consistent with the backend API.

I've also renamed searchTextInput to searchInput to disambiguate it from searchText. Now, searchInput can either be dispatched to searchText or tags, depending on the isTag boolean variable.

Tests

• We don't have E2E tests for downloading links as CSVs. Might want to set that up sometime

[thanhdatle]

It's a pretty elegant fix to me.