feat(feed): fix pagination, auth error handling, and empty states master
Thread loadFeed callback through PostListShell and VirtualFeed to restore infinite scroll pagination on home and community pages. Add auth error detection (401/403) that shows session-expired message with login button. Improve feed robustness with null-safe responses, cursor-based hasMore logic, and proper error re-throwing. Changes: - Add loadFeed prop to PostListShell and pass to VirtualFeed - Create loadFeed functions in home and community page loaders - Detect XrpcError 401/403 and show login prompt instead of retry - Move loading=false to finally block in VirtualFeed - Guard against null feed responses with ?? [] - Add empty state placeholder on home page - Fix /communities link to /explore/communities - Update empty feed description copy Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>