feat(workspaces): add option to disable focus hint icons

[zebubull]

Summary

Added a "Show Icons" toggle to the workspaces widget to control whether icons are drawn in focus hint mode.

Motivation

I prefer the way inactive workspaces pills are drawn in the focus hint style but don't want the focused app icon to be shown in the active pill. I tried using the regular style and lowering the inactive pill size, but this only affects the width of the inactive pills and leaves them full height. I figured the best way to solve this would be to add a "show icons" setting, similar to the existing "show labels" setting, to allow for the focus hint style pills without showing app icons.

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring
• Build / packaging

Testing

I made sure both the gui setting and the "show_icons" toml key toggled the app icon, and that the gui setting was only visible when in focus hint mode. I also made sure that icons are shown by default to be consistent with existing behavior.

Manual Coverage

• Tested on Niri
• Tested on Hyprland
• Tested on Sway
• Tested on another compositor:
• Tested with different bar positions and density settings
• Tested at different interface scaling values
• Tested with multiple monitors

Screenshots / Videos

2026-08-19.15-25-57.mp4

Checklist

• This PR is ready for review, or it is marked as Draft.
• I read and followed the relevant guidance in CONTRIBUTING.md.
• I ran just format with clang-format v22+ installed, or this PR has no code changes.
• I ran the relevant build or test commands, or explained why they were not run.
• I self-reviewed the changes.
• I checked for new warnings or errors.
• I will update end-user documentation after merge, or this PR does not change user-facing configuration or behavior.
• I added or updated assets/translations/en.json, or this PR adds no new user-facing strings.
• I did not edit non-English translation files unless this PR is explicitly for translation tooling, an import/export sync, or a maintainer-requested locale change.
• I used the existing canonical names for config keys, IPC names, paths, and identifiers.