Annotation tools break when a custom theme is applied (fixed sidebar overlap)

[ajmasia]

Title: Annotation tools break when a custom theme is applied (fixed sidebar overlap)

Describe the bug
When a custom theme is applied in Gradia, the annotation tools panel becomes non-functional or visually broken. The issue appears to be caused by the sidebar being rendered with a fixed position, which overlaps or clips the tools area, making them unresponsive or inaccessible.

Steps to reproduce

1. Open Gradia.
2. Apply any custom theme (e.g. from system settings or in-app theme selector).
3. Open the annotation tools sidebar.
4. Observe that the annotation tools (draw, text, shapes, color pickers, stroke slider, etc.) are broken or unclickable.

Expected behavior
Annotation tools should remain fully functional and correctly positioned regardless of the active theme.

Actual behavior
The fixed sidebar overlaps or misaligns the tools panel, breaking interaction with the annotation tools when a theme is active.

Screenshots

Environment

• Gradia version: 1.12.1
• OS: Debian 13
• Theme applied: Catppuccin Mocha

Additional context
The issue does not seem to occur when no custom theme is applied. The sidebar fixed positioning may not account for theme-related layout offsets or z-index changes.

[ajmasia]

Installed on Debien 13 using flatpack