Vendors in the sidebar, smarter expense forms & more

We've been tidying up a few rough edges and adding some quality-of-life improvements across the app.

Vendors now live in the sidebar
Vendors finally have their own spot in the main navigation, right alongside Clients. No more hunting through settings to manage your supplier list.

Vendor dropdown on expenses
When logging an expense, you can now pick a vendor directly from a dropdown, no more retyping the same supplier name every time. Select one and the name fills in automatically. If it's a one-off you haven't added as a vendor yet, just type it in as before.

Archived projects hidden from dropdowns
Archived projects no longer show up when creating invoices or expenses. Cleaner lists, less clutter.

Mobile layout fixes
A few button groups were getting cramped on smaller screens — the action buttons on the Income and Claims pages now wrap to their own line on mobile and stay right-aligned.

Sharing updates (like this one) now shows the right preview
When you share a link to an update, the social preview now correctly shows the update's title, description, and cover image instead of the generic GoSimpleProject image.