Dashboard sidebar redesign

We've replaced the top navigation bar with a collapsible sidebar, giving you more screen space for the capture workspace while keeping every feature one click away.

What changed

• Collapsible sidebar — Expand for labels, collapse to icons-only for a wider workspace
• Grouped navigation — Related pages are grouped together (capture, management, settings)
• Persistent state — The sidebar remembers your preference between sessions

The new layout works better on all screen sizes and makes it easier to find what you need as we add more features.