[Phase 3.1] Build public feedback portal

[Andreas-Froyland]

Goal

A shareable public-facing feedback board for each project. Anyone can view, create feedback, and upvote — no login required.

Depends on: Phase 2 complete (#8, #9, #10, #11, #12, #13) - this reuses all those components, just makes them public

URL

/[org-slug]/[project-slug] — clean, shareable

Features

• Same card-based listing as the internal view ([Phase 2.2] Build feedback listing page with filters and sorting #11)
• Same filters (category, status) and sorting ([Phase 2.2] Build feedback listing page with filters and sorting #11)
• "New Feedback" button opens the creation form ([Phase 2.1] Build feedback creation form #10)
• Upvoting works ([Phase 2.4] Implement upvoting system #12) - creates anonymous session if needed
• Feedback detail view accessible ([Phase 2.3] Build feedback detail view #13)
• Clean, minimal layout — no internal dashboard chrome

Org controls

• Toggle per-project: public or private (invite-only, stretch goal)
• Org can choose which statuses are visible publicly
• "Share" button in project settings copies the public URL

Design notes

• Minimal, clean layout — focus on feedback, not UI
• Org branding: project name + optional logo/description at top
• "Powered by Veerify" footer link (subtle)

Implementation note

This should largely be routing + layout changes. The core components (listing, creation form, detail view, upvoting) are already built in Phase 2. Don't rebuild them — reuse them.