Pages of Atlas

Fixes

• Prevents failed PBR atlas pages from retrying expensive builds every rendered frame.
• Stops requests for PBR pages that do not exist in the active atlas plan.
• Releases obsolete secondary atlas textures when switching to a lower-resolution or smaller resource-pack configuration.
• Safely recreates secondary atlas pages when switching back to a multi-page configuration.
• Stages replacement atlas generations until every physical page has uploaded successfully, preventing render access to uninitialized texture views.
• Moves PBR and physical-atlas GPU cleanup onto the render thread.
• Removes obsolete per-quad Sodium diagnostics and temporary atlas-placement logging.
• Corrects the Mod Menu icon dimensions to 330×330.

Performance and memory

• Eliminates repeated nonexistent-page work from the terrain-rendering path.
• Removes diagnostic atomic contention and ThreadLocal entry churn from Sodium chunk compilation.
• Prevents obsolete secondary atlases from retaining unnecessary VRAM after resource reloads.