c6861c71f0
Full diagnosis + fix for "Unknown error during upload" on large files: root cause is browser DNS-over-HTTPS bypassing LAN DNS -> Cloudflare mangles the parallel chunk stream. Server/DNS already correct (Technitium+UniFi return internal .185). Fix = disable browser DoH (.reg/PowerShell/GPO included). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>