Per-tab icons: library, own file, or favicon from a URL (right-click menu)

[paehtz]

Idea

Show an icon in each tab — icon-only when space is tight (see compact mode), or icon + text as a visual touch even with room.

Assign an icon via a right-click context menu per tab

• Pick from a built-in icon library — a bundled set of generic open-source icons (e.g. Lucide / Tabler / Feather, MIT/ISC; bundled and attributed in THIRD-PARTY-LICENSES.md)
• Choose your own file (.ico / .png)
• Enter a website URL → the favicon is fetched automatically (try https://domain/favicon.ico, fallback a favicon service) and cached
• Remove icon

Persistence

Per desktop name in settings.ini, section [Icons] (Desktop name = path or URL), mirroring the existing colour overrides.

Use case

One virtual desktop = one client project; the tab shows the client's website favicon.

Tasks

• Right-click context menu per tab
• Icon library picker (bundle + attribute an open-source set)
• Custom file picker
• Favicon fetch + cache from URL
• Render icon in the button (Picture control), adjust width; icon-only mode
• Persist in settings.ini [Icons]