Implement Player Effect Synchronization and Address Critical Issues#3

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RCUTANF wants to merge 19 commits intocunhar:mc/1.21.10from

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Commits on Dec 11, 2025

update cloth config version to 20.0.149 to fix crash bug while click LAN settings in multiplayer game
RCUTANF
committed
fix：Refactor CustomPacketCodecs to use OPTIONAL_STREAM_CODEC for ItemStack serialization for fixing HotBar item decode fail.
RCUTANF
committed
feat: Implement effects synchronization for players in SpectatorPlus
RCUTANF
committed

Commits on Dec 12, 2025

fix: effect sync and render
RCUTANF
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Commits on Dec 13, 2025

fix: hand height calculations bug
RCUTANF
committed

Commits on Dec 14, 2025

Commits on Dec 17, 2025

fix: prevent incorrect arm orientation when spectating by skipping mulPose in renderItemInHand
RCUTANF
committed

Commits on Jan 2, 2026

fix: update fabric-loom plugin version to 1.13-SNAPSHOT
RCUTANF
committed

Commits on Jan 3, 2026

update to 1.21.11
RCUTANF
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Commits on Jan 4, 2026

fix: replace ResourceLocation with Identifier for packet type definitions
RCUTANF
committed

Commits on Jan 31, 2026