v1.3.0-mc26.1.x-release

• Fixed server-defined toast notices so Minecraft 26.1.x entries can show a toast even when the installed pack version is current.
• Kept fullscreen and chat update prompts limited to entries with a newer version.
• Allowed toast-only current-version notices without requiring update download metadata.
• Rebuilt release artifacts for Minecraft 26.1.x.
• No local config changes are required.