AI duplicate detection on new feedback (pgvector)
When a user opens "submit feedback", show a "we may already have this" panel under the title field, powered by an embedding similarity query against existing posts in the same project. `vector` extension is already enabled in `0001_init.sql`.
Threaded comments / nested replies on posts
Right now comments are a flat list. For longer discussions on a feature post we'd like to be able to reply directly to a specific comment so threads don't lose context. The schema already has `parent_id` on `comments`, so this is mostly UI work.
Public roadmap kanban with one-click "Accept feedback" → Planned
Roadmap as a kanban with Open / Planned / In progress columns, one-click admin "Accept" on a feedback post that moves it to Planned, and an "Add roadmap item" admin action that creates a card directly.
Cross-project switcher inside project sidebar
When I'm deep inside `/app/[org]/[project]/feedback`, I have to bounce back to `/app` to switch to a sibling project. A small switcher at the top of the project sidebar (org name → dropdown of projects in that org) would make this one click.
Add branding options
settings page should have branding of color and logo etc for admin dashboard
Test roadmap item
test body