Task location icon: tooltip has no branch name, and icon-only encoding is hard to read at a glance

[adamatan]

What

TaskLocationIcon (src/components/TaskLocationIcon.tsx, introduced in upstream 6185214 "rename workspaces to tasks") renders one of two icons next to a task row (GitBranch for worktree, Link2 for main checkout), both the same neutral gray at 14px, with a native title tooltip that's just the literal string "worktree" or "main checkout".

Two problems:

1. The tooltip never includes the branch name, even though w.branch is already available right next to it in Sidebar.tsx. You can tell "this is a worktree" but not which branch.
2. GitBranch vs Link2 at that size/color are subtle enough that telling them apart requires hovering and reading the tooltip anyway, defeating the point of an at-a-glance icon.

Proposed direction

Make the common case quiet and the notable case explicit, rather than an icon on every row:

• Task is the main checkout and checked out on the project's default branch (project.base_branch): show no icon at all. This is the default, unremarkable state for most tasks.
• Task is the main checkout but on a different branch: show an icon plus the branch name inline (not hover-only).
• Task is a worktree: show a distinct icon plus the branch name inline.

This cuts visual noise for the common case, and makes the one thing people actually want to know, the branch, visible without a hover in the cases where it matters.

Notes

I'll pick this up in a PR.

[simion]

A small misconception here: we only have main checkout and worktrees (each worktree forces a new branch).

You can't have a task in main checkout default branch and at the same time a task in main checkout but a different branch.
Both tasks will use the main checkout, regardless of which branch is currently checked out.

That's why we use worktrees, to have tasks with different branches checked out at the same time.

If we were to display the current branch for the main checkout, all tasks launched there will show the same branch.

I'll think about this. Having the branch visible might help.

[adamatan]

Sure - a repo can have only one HEAD, meaning one branch. If we checkout another one, all open tasks will have to have their branch names changed simultaneously.
If the branch is main, we don't have to show it. It's well-known default and we don't need to belabor the obvious.
If the branch isn't main - either by checking out another one at the repo, or a worktree - it will be a useful visual clue.

I can build a demo version we can play with to test before making a decision.

[simion]

Agreed then. We can show the branch when it's the non default one, for main checkout. And only show the worktree icon. Just need to find a way for it to not take up too much space.

Also, needs to be low overhead. Need to carefully choose when we update the current branch.