feat: responsive table in /mapping

[veenoise]

Changelog:

• Add div container for table with overflow-x auto in /mapping

Before

Screen.Recording.2026-03-31.at.12.43.02.PM.mov

After

Screen.Recording.2026-03-31.at.12.43.39.PM.mov

[vbakke]

@Klath123 and @veenoise: I just discovered that #527 and #534 both change the Mapping page.
Not sure if there will be conflicts. Just letting you know, so that both of you also knows. Feel free to sort out any merge conflicts directly with each other, either in the issues/pull requests, or in the slack #dsomm channel. :)

[vbakke]

Sorry, I fail to see the benefit here, @veenoise.

With this change I do not get the sideways scroll bar, unless I scroll all the way to the bottom of the page.

[veenoise]

Yeah, I tried @Klath123's pr and it already implemented the isolated overflow-x to the table. Can you merge @Klath123's pr @vbakke, my PR is not needed after that.