feat: [1144] 背景・マスクモーションでカラーオブジェクトに対してレーン番号指定に対応、レイヤーに対してtransform指定に対応

[cwtickle]

🔨 変更内容 / Details of Changes

1. feat: 背景・マスクモーションでカラーオブジェクトに対してレーン番号指定に対応

• 背景・マスクモーションでカラーオブジェクト指定する対象にレーン番号を指定できるようになりました。
• レーン番号を指定すると、レーン番号に対応する矢印・おにぎりが表示されます。
• また、PlayWindow設定が有効な場合に自動で設定に応じた回転が反映されるようになります。

|back_data=
7520,0,[c]4/#ccccff,,{g_workObj.stepX[4]},{g_posObj.stepY + g_posObj.reverseStepY * g_workObj.dividePos[4]},50,50,1,slide1-0,20,forwards
|

2. feat: 背景・マスクモーションで階層ごとにtransform指定が行える機能を追加

• 背景・マスクモーションの階層ごとに、transform指定が行えるようになりました。
• 階層の後に[t]に続いてtransform属性を指定します。
  その後続けてカンマで優先度を指定します。（優先度の初期値は1000）
• 実態はaddTransform関数を使っています。transformIdはアニメーション種類 + 階層が割り当てられます
  （例. back3, mask4）

|back_data=
7520,0,[t]rotate(30deg) translateX(-30px),400
8500,0,[t]    // 無指定で設定されているtransformを解除
|

🔖 関連Issue, 変更理由 / Related Issues, Reason for Changes

1. 実際のステップゾーンに続けてアニメーションさせたいときがあるため。
2. 階層の位置自体を変えたい場合があるため。

📷 スクリーンショット / Screenshot

📝 その他コメント / Other Comments

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Review details

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 10107907-fb6b-4584-8d63-dd7bc320bcd7

📥 Commits

Reviewing files that changed from the base of the PR and between fb50731 and 9291172.

📒 Files selected for processing (1)

• js/danoni_main.js

📝 Walkthrough

Summary by CodeRabbit

• New Features
  • Background sprites now support transform settings, including numeric and custom transform values.
  • Sprite frames can apply color and transform settings simultaneously.
  • Ordinary HTML content renders directly when no sprite styling is specified.

Walkthrough

Changes

Sprite transform handling

Layer / File(s)	Summary
Transform metadata parsing js/danoni_main.js	makeSpriteData parses [t] entries, resolves numeric values through stepRtn, and stores explicit transform text with class-based priority.
Combined sprite rendering js/danoni_main.js	drawBaseSpriteData renders ordinary HTML directly and applies color objects and transforms independently.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🔵 Low · up to fb507

Layer transforms may persist from a previous frame when the next frame does not specify one, causing background or mask motion to remain incorrectly transformed. The change is otherwise localized, but this bounded correctness issue should be addressed or explicitly accepted before merge.

Possibly related PRs

• cwtickle/danoniplus#1748: Adds earlier sprite transform handling extended by this change.
• cwtickle/danoniplus#1979: Introduces step-rotation and priority transform data consumed by this change.

Suggested labels: func:Settings

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	タイトルは、カラーオブジェクトへのレーン番号指定と階層ごとのtransform指定という主要な変更を明確に示しています。
Description check	✅ Passed	説明は、カラーオブジェクト、レーン番号、回転、階層ごとのtransform指定の変更内容と理由を具体的に説明しています。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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• Commit unit tests in branch feature/1144-back-color-object

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Actionable comments posted: 1

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Inline comments:
In `@js/danoni_main.js`:
- Around line 2437-2456: Update drawTitleResultMotion/drawBaseSpriteData
transform handling to remove stale layer transforms before or while processing
each frame. Track the transform IDs present in the current frame and call
delTransform for previously active layer IDs that are absent, including when the
current playWindow frame has no entries; preserve addTransform behavior for
transforms that are present.

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• js/danoni_main.js

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