Feature Request: Sidebar density: single-line spaces and per-section row gaps (via config)

[amberpixels]

Context

Once I'm running a handful of worktrees and agents, the sidebar runs out of vertical room fast. Two things eat the space:

• each workspace takes two rows (name, then branch underneath), and
• there's a blank row between every entry in both the spaces and agents lists.

Requested change

A few opt-in [ui] toggles to tighten the sidebar, all defaulting to today's behavior so nothing changes for anyone who doesn't set them:

option	default	effect
sidebar_single_line	false	render each workspace on one row as name • branch instead of name + branch on a second line
space_panel_row_gap	true	blank row between workspaces; false packs them
agent_panel_row_gap	true	blank row between agents; false packs them

The two gap toggles are separate on purpose - I often want a compact agents list but keep spaces airy (or vice versa).

Single-line keeps the branch visible: when the row is too narrow, the name and branch share the width and only the longer side is truncated, so short branches like main stay whole while the name shortens.

Nothing changes by default. Every option is opt-in and off out of the box - if you don't set any of these, the sidebar looks and behaves exactly as it does today.

Naming follows the existing *_panel_* / sidebar_* config conventions.

Extra

The prototype also includes an agent_panel_numbers toggle (default off) that shows each agent's 1-9 position under its status icon, giving the focus_agent shortcuts a visible index. That overlaps #814, which already asks for sidebar index numbers — so I'd happily land it there instead; mentioning it here only because it rides along in the same prototype and shows up in the screenshots below. (We can ship just the gaps without numbers)

Notes

I'm not married to the exact knobs - happy to collapse these into a single toggle, or whatever fits the direction. I have a working prototype on a branch and can share it / open a PR if you're open to the idea and OK with the path.

Draft PR (fork repo) amberpixels#1

Demo

[victor-falcon]

Can we somehow push this?

Ever since I opened two workspaces, each with a few worktrees and an agent on each, I simply run out of space and can't see the agents' statuses.

[amberpixels]

@victor-falcon same here - been running it from my fork for ~3 weeks, works well.

@ogulcancelik any interest in merging the PR for this? It's actually less work than when I opened this: your token-row sidebar already handles the single-line spaces part, so it's down to just the two row-gap toggles now.

I've reimplemented them on top of latest master. Happy to adjust whatever, or you can take the idea and do it your way.

[victor-falcon]

i'm also running this on a fork 😅 , no issues so far

[ogulcancelik]

i'm currently trying to convert license to apache so contributions are frozen atm, but i really liked the idea so made it configurable and default to 0 gaps with 5b91dae, not released yet