Minestom 26.1.2, animation/texture fixes, cleaner API + Blockbench features

[iam4722202468]

Updates WSEE to the latest Minestom, fixes real animation/texture bugs, cleans up the API, and adds several Blockbench features. Six logically-grouped commits; full build + 12 JUnit tests pass on Java 25.

Bug fixes

• Animation translation was 4× too weak. The offset was divided by 4 twice (frame provider + display), so position keyframes moved parts a quarter of the authored distance. Verified against a Blockbench-faithful reference renderer (per-bone transforms now match exactly).
• Only linear interpolation actually worked. catmullrom/step fell into a broken 2-point slerp; translation/scale ignored the mode entirely. Rewritten to real Blockbench step / linear / Catmull-Rom for all channels.
• Molang keyframes threw on Java 16+. The dev.hollowcube:mql JIT reflectively calls ClassLoader.defineClass, blocked by strong encapsulation → InaccessibleObjectException on the Java 25 target. Replaced with a small dependency-free Molang evaluator (case-insensitive, math.* in degrees, query.*, ternary, etc.).
• Uppercase/space bone names broke textures on vanilla clients (issue The Textures are not loading for players that do not use the Iris Shader Mod (from Modrinth) #36, masked by Iris/Sodium). Resource-location strings + model filenames are now sanitized/lower-cased.
• Hardened the base64 texture decode (issue The model cannot display textures #65) and null/missing keyframe fields (malformed models no longer crash the pack build).

Minestom 26.1.2

Version bump + API fixes (getViewers wildcard, sendPacketsToViewers, LazyPacket removal, test-server time API). Also fixed the JUnit runner (was missing junit-platform-launcher, so no tests could run).

Cleaner API

• ModelEntity — extend it instead of hand-wiring an invisible carrier entity; it owns the model and auto-syncs viewers + position + lifecycle.
• Normal hit events (breaking): hits on a model hitbox now fire a normal Minestom EntityDamageEvent / PlayerEntityInteractEvent on the owner entity (GenericModel#getOwner). ModelDamageEvent and ModelInteractEvent are removed.
• setNametag(bone, Component) creates a modern TextDisplay nametag.

New Blockbench features

• Sound / particle / timeline effects from the animation timeline (default handler + setEffectHandler override).
• Loop modes — non-looping animations now hold their last frame instead of always looping.
• Animation blending — playRepeat(name, blendTicks) crossfades animations by weight.
• Bone visibility — setBoneVisible(name, boolean) for damage states / equipment / phases.
• Locators — getLocator(name) returns a locator's world position (previously dropped).
• Bezier keyframes interpolate as a smooth spline (was a linear fallback); discontinuous keyframes (pre/post values) supported.

Performance

Per-bone metadata dirty-check (only send when a transform changes), live viewer view (no per-tick copy), and per-draw memoization of propagated + world rotation/scale so the hot path stops re-walking the parent chain.

Honest caveats / not done

• Everything is build- and reference-verified but not yet eyeballed on a live 1.21.11 server — worth a smoke test (animations, textures, effects, the removed-events migration).
• Left as follow-ups: the world-position single-pass optimization (memoized rotation/scale only), real life_time threading (approximated by anim_time), custom-handle bezier (approximated as Catmull-Rom), and timeline-effect default behavior.

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