Unify Scratch angle and internal angle handling for actor rotation

[oco777]

Summary

• add a ScratchAngleUtil runtime helper to convert between Scratch角度 and 内部角度
• convert ScratchUnits that manipulate actor direction so ActorPresenter receives 内部角度 values
• clarify direction terminology in ActorPresenterAdapter and VS_Scratch_Mapping.md

Testing

• not run (not requested)

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Codex Task

[chatgpt-codex-connector]

💡 Codex Review

FUnity/Runtime/Core/ScratchAngleUtil.cs

Lines 1 to 5 in 34e9687

	// Updated: 2025-10-23
	using UnityEngine;
	namespace FUnity.Runtime.Core
	{

Check in ScratchAngleUtil.cs.meta

Root AGENTS.md mandates that every new .cs file is committed together with its Unity–generated .meta, yet the newly added Runtime/Core/ScratchAngleUtil.cs has no accompanying .meta file in this change set. Unity will create ScratchAngleUtil.cs.meta automatically with a new GUID the next time the project is opened, so anyone syncing this commit will immediately get a dirty worktree and risk GUID mismatches for references to this script. Please add the generated .meta file so the repository stays consistent.

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