Add config option for the default task instance tab in the UI

[dsuhinin]

Task instances always open on the Logs tab, and users who prefer another tab have to click it every time — there is no way to change the default.

This adds a new [api] default_task_instance_tab config option that lets a deployment set which tab opens by default when a task instance is first opened (e.g. details). The index route reads the value from /ui/config and redirects to the configured tab, preserving the query string and hash; unknown or unset values fall back to logs, so existing behavior and deep links are unchanged. Explicit tab choices made while navigating task-to-task in the grid still take precedence.

[bbovenzi]

I thought about your PRs again.

First, if we do this, we should make these localStorage settings instead of deployment configs and they could go in Pierre's new settings page: #70687

Second, to preserve any links. Let's not mess with the Urls themselves but just redirect to a different page by default.

Finally, being powered by the config isn't great when loading a brand new page when the config hasn't been fetched yet. The screen will have to show one page, and then start loading a different one.

[dsuhinin]

I thought about your PRs again.

First, if we do this, we should make these localStorage settings instead of deployment configs and they could go in Pierre's new settings page: #70687

Second, to preserve any links. Let's not mess with the Urls themselves but just redirect to a different page by default.

Finally, being powered by the config isn't great when loading a brand new page when the config hasn't been fetched yet. The screen will have to show one page, and then start loading a different one.

thank you for your feedback. yep, in case of #70687 I can re use this PR and just add more options. Probably in that case I can move:

• Add config option for the default task instance tab in the UI #71235
• Allow configuring the default landing page #70754
  to be based on this PR and instead of instance config store everything in the same way in localStorage. What do you think?