Backport 26.1 compatibility updates to 1.20.1

[rsdadada]

Overview

• This PR backports the behavior and internal implementation details from 26.1/dev that are reasonable for Minecraft 1.20.1, Java 17, and the Forge + Fabric architecture, based on the actual origin/1.20.1...HEAD diff.
• The goal is to reduce the code gap between 1.20.1 and 26.1 while avoiding a mechanical sync of 26.1-only APIs, NeoForge/Kotlin DSL/Java 25/version updates, and the newer rendering submission pipeline.
• The PR currently contains 6 commits and touches 47 files: common source code, access widener/mixin configuration, language resources, and GitHub issue templates. It does not change Gradle dependency versions or the loader structure, and it raises the 1.20.1 build version to 0.7.8-beta.

Behavior and Configuration Changes

• Renamed swimOutTick to the more general outTick, used for delaying main-feature recovery after leaving a restricted state. The old config field is kept as a deprecated migration entry point; when old configs are read, the old value is migrated if outTick is still at its default value, then the old field is cleared.
• Added disableWhenCrawling for bind mode. Swimming and crawling now share the same outTick delay logic. Classic mode still only syncs the swimming exit delay and does not add a crawling toggle.
• Moved bind-mode disable-related Cloth Config options into the disableConfig subcategory: sneaking, crawling, swimming, outTick, held-item main-feature disable, and held-item rendering disable.
• Generalized DisableHelper from the swimming-specific swimmingRecently path into checkCondition, and changed wildcard \\*+ splitting to use the precompiled Pattern MULTI_STAR.
• Synced BindTarget.vanillaTarget's default disablingDepth from 0.1f to 0.2f; BindTarget network/JSON fields and serialVersion remain unchanged.

Binding, Render Capture, and Caching

• Added RenderTypeCache to centrally manage the texture ID cache and primitive cache, using Guava LoadingCache with maximumSize and expireAfterAccess so long-running sessions do not leave static HashMaps growing without bounds.
• Texture ID lookup now uses a 1.20.1-compatible mixin accessor/access widener path, reading CompositeRenderType -> CompositeState -> textureState -> cutoutTexture(). It no longer parses RenderType.toString() with a regex. For RenderTypes whose texture cannot be extracted, it still falls back to renderType.toString() as an identifier.
• Added 3 accessor mixins and declared the required 1.20.1 access permissions in realcamera-common.mixins.json and realcamera.accesswidener.
• Changed the primitive cache from the old RenderType -> Map<UV, float[]> shape to PrimitiveLayoutKey -> Object2IntMap<UV>, caching the primitive index for each UV. The missing default value is -1.
• PrimitiveLayoutKey additionally includes texture/render type, draw mode, vertex layout, vertex/primitive count, and mesh ordinal on 1.20.1. This adapts to the older rendering segmentation, where different meshes can share the same RenderType, and avoids incorrectly reusing the coarser 26.1-style cache.
• Added mode(), vertexLayoutHash(), readPrimitiveAt(int), primitiveLength, and primitiveCount to IterableVertexBuffer, allowing cache hits to read primitives directly by index.
• BuiltIterableBuffer.resolvePrimitives() now tries cache hits first, then scans only missing UVs. If a cached index is out of bounds or the primitive read from it no longer contains the target UV, it invalidates the current layout cache and falls back to scanning.
• Removed the old allCached / uvFingerprint path. UV fingerprints are no longer built for every buffer; stale cache entries are handled through read validation and layout-cache invalidation.

YSM and Model Capture

• YSMCompat still fundamentally simulates 4 player head rotations to match Yes Steve Model binding points; the core idea of matching by simulated head rotation is unchanged.
• YSM now gives each TransformedVertexRecorder its own MultiVertexCatcher: the first render pass captures buffers and tries cache hits, while the fallback phase reuses those captured buffers to scan missing primitives. Cache misses no longer trigger extra entity renders.
• Changed resultMap.computeIfAbsent in YSMCompat to the method-reference style and narrowed the recorder into a private final class.
• Added lifecycle methods create(), clear(), and forEachBuffer() to MultiVertexCatcher; the old endCatching() is kept as a try/finally wrapper to preserve the original "iterate, then release" semantics.
• Changed RealCameraCore.computeCamera, RealCameraCore.renderCameraEntity, and ModelAnalyser.updateModel to explicitly clean up catchers with try/finally, preventing captured meshes from leaking on exceptional paths.

Geometry Checks and Model View

• Removed the java.awt.Polygon dependency from BuiltIterableBuffer and ModelAnalyser, replacing it with MathUtil.pointInTriangle / pointInQuad and VertexData.containsUV / containsXY.
• Added cross, triangle/quad hit tests, fixed-argument floor / ceil helpers to MathUtil, and changed projectToVec2 to take Matrix4fc.
• VertexData.ImmutableVertex.asImmutable() now directly returns itself; MutableVertex was extracted from an inner VertexData class into a top-level class, reducing implementation weight inside the interface and aligning more closely with the 26.1 structure.
• Made ModelAnalyser.focusedPolyhedron private and exposed getFocusedPolyhedron(), replaced Object[] with the ZEntry record, and used LongOpenHashSet quantized vertex keys to expand adjacent primitives.
• Model-click depth sorting keeps the 1.20.1-verified vertex.z() + deltaZ; it does not mechanically adopt the sign change from the 26.1 coordinate convention.
• Texture-view clicks now inverse-transform the mouse point through the texture pose back into UV space, then run UV hit testing, instead of transforming UVs into screen coordinates and building a Polygon.
• Made GUIHelper final and synced method names to the shorter outline, triangleOrQuad, and vector forms.

GUI Structure and Key Bindings

• Moved GUI controls into the com.xtracr.realcamera.gui.components package: TexturedButton -> SimpleIconButton, CyclingTexturedButton -> CycleIconButton, and moved DoubleSlider / NumberField as well.
• Added NumberWidgetPair, combining an offset/rotation input field and slider into one component. ModelViewScreen no longer maintains 6 duplicated field + slider pairs.
• The model view still keeps the existing save, delete, import, export, disabled-region selection, and related workflows. This PR only removes the old copy/paste disabled-config controls and their language keys.
• KeyMappings now uses the new key.category.xtracr_realcamera.general category key, and key handling saves ConfigFile.save() once after any key is consumed during a handle pass instead of saving inside each individual click branch.

Resources and Metadata

• Added .github/ISSUE_TEMPLATE/bug_report_cn.yml and bug_report_en.yml.
• Synchronized key ordering across 16 lang JSON files, and added/removed keys to match the code.
• Added language keys: config.option.*.disableConfig, disableWhenCrawling, outTick, config.tooltip.*.outTick, key.category.*.general, and screen.widget.*.modelView_currentConfig.
• Removed language keys: config.option.*.swimOutTick, config.tooltip.*.swimOutTick, screen.widget.*.modelView_copy, modelView_paste, screen.tooltip.*.modelView_copy, and modelView_paste.

Explicitly Not Backported

• Does not sync NeoForge, Kotlin DSL, Java 25, Minecraft 26.1.x dependency versions, or any Gradle build-structure changes. This PR only explicitly raises the 1.20.1 mod_version to 0.7.8-beta.
• Does not use 26.1's RenderSetup, extractEntity, submit, SubmitNodeStorage, or newer renderer package structure. Those rendering APIs do not exist in 1.20.1, so this PR only backports the ideas of post-capture reuse and cache-hit-first lookup.
• Does not split the top-level RealCameraConfig structure. This PR only performs field migration and UI grouping to avoid expanding 1.20.1 config-compatibility risk.
• Does not revert to the old UV -> float[] primitive cache. 1.20.1 uses a layout-scoped primitive-index cache to support the differences in older rendering segmentation.

Compatibility Notes

• BindTarget.DisableConfig JSON and network serialization fields are unchanged; only the internal UV hit-cache structure is replaced.
• swimOutTick is preserved as an old config read field and migrated to outTick; the new UI and language keys only expose outTick.
• The primary texture ID path does not depend on a RenderType.toString() regex; fallback toString() is only used as an identifier for RenderTypes whose texture cannot be extracted.
• YSM matching semantics are unchanged. The changes are concentrated in buffer capture, cache hits, and miss-path reuse.

Verification

• .\\gradlew.bat build
• common:compileJava
• fabric:validateAccessWidener
• forge:validateAccessWidener
• Parsed all lang JSON files as UTF-8
• git diff --check
• Checked that no old coarse-grained primitive cache paths remain: allCached, uvFingerprint, RenderType -> Map<UV, Integer>
• Checked that no old GUI / utility names remain: RenderTypeUtil, old button class names, VertexData.MutableVertex, AWT Polygon