feat: expand multiplayer, chat, and release support

- add network NPC synchronization and dialogue interactions
- add world bulletin publishing and display
- improve authentication, session refresh, and appearance sync
- synchronize player direction and movement animations
- improve input focus and progressive Web loading
- add macOS/Windows builds and deployment configuration
- include required fonts, shaders, and runtime assets

assets/ui/world_bulletin/community/pinned_note.png.import

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