Optionally extract Worktrees into a separate side window and make Status window optional

[armanarutiunov]

PR Description

Disclaimer: this PR is completely clauded and as I don't have experience with go, I can't really guarantee code quality, so apologies in advance.

Motivation

I'm a heavy worktree user and one thing I wanted improved in the app is visibility of all the worktrees and the currently selected one. Right now the worktree menu is buried in the second window group as a separate tab. What I always wanted is to have a dedicated worktree window group.

While thinking about it I realised if I was to add a separate group, the total group count would be 6 which can be a bit too tight on smaller screens. Plus not everybody is using worktrees and for some it would be a useless change that occupies precious terminal real estate.

So, I decided to add 2 config flags, one for showing the worktree group as a separate group, second one is for hiding the very first status group to free up some space in case user doesn't care about that group. Both are false by default.

Implementation (claude generated)

Two new independent gui config options:

• worktreesInSeparateGroup (bool, default false) — moves Worktrees out of the Files tab group into its own side panel window, positioned between Status and Files
• hideStatusPanel (bool, default false) — hides the Status panel entirely from the side panel

When both are enabled, the layout becomes: Worktrees[1] → Files[2] → Branches[3] → Commits[4] → Stash[5] — preserving the default 5-key jump binding.

When worktreesInSeparateGroup is enabled without hiding status, there are 6 windows. The jump-to-block controller auto-extends keybindings (adding key "6") so no manual config change is needed.

Key changes:

• SideWindows() dynamically builds the window list based on config
• sidePanelChildren() conditionally includes/excludes status and worktrees boxes across all layout modes (full/half screen, normal, squashed)
• Worktrees context switches its WindowName from "files" to "worktrees" when separated
• viewTabMap() removes the Worktrees tab from the Files group when separated
• Panel jump labels are assigned dynamically based on the actual window list

Screenshots

With status section
Without Section

Please check if the PR fulfills these requirements

• Cheatsheets are up-to-date (run go generate ./...)
• Code has been formatted (see here)
• Tests have been added/updated (see here for the integration test guide)
• Text is internationalised (see here)
• If a new UserConfig entry was added, make sure it can be hot-reloaded (see here)
• Docs have been updated if necessary
• You've read through your own file changes for silly mistakes etc