Adjust table surface Y offset and fix ja doc encoding

Author: blhsrwznrghfzpr

docs/object-conversion/table.ja.md

@@ -1,4 +1,4 @@
-# Table 変換仕様
+# Table 変換仕様
 
 [English](table.md)
 
@@ -48,7 +48,7 @@ Udonarium の `game-table` オブジェクトを Resonite の slot/component へ
 
 天板子 slot（`-surface`）:
 
-- `position = (width / 2, 0, -height / 2)`
+- `position = (width / 2, -0.0001, -height / 2)`
 - `rotation = (90, 0, 0)`
 
 これにより、table コンテナの座標安定性を保ちつつ、天板メッシュを table 平面に一致させます。
@@ -93,7 +93,7 @@ table ルート slot:
 
 ## 8. 確認ポイント
 
-1. `-surface` が `(width/2, 0, -height/2)` に配置される
+1. `-surface` が `(width/2, -0.0001, -height/2)` に配置される
 2. table ルート回転が `(0,0,0)` に固定される
 3. `-surface` に `QuadMesh` と `BoxCollider` が付与される
 4. table 配下オブジェクトが `-surface` の後続子として変換される

docs/object-conversion/table.md

@@ -48,7 +48,7 @@ Root slot:
 
 Surface child slot (`-surface`):
 
-- `position = (width / 2, 0, -height / 2)`
+- `position = (width / 2, -0.0001, -height / 2)`
 - `rotation = (90, 0, 0)`
 
 This keeps the table container transform stable while aligning the visual mesh to table coordinates.
@@ -93,7 +93,7 @@ This ensures only selected table(s) are visible when multiple tables are present
 
 ## 8. Validation Points
 
-1. surface slot is created with center offset `(width/2, 0, -height/2)`
+1. surface slot is created with center offset `(width/2, -0.0001, -height/2)`
 2. table root rotation remains `(0,0,0)`
 3. surface has `QuadMesh` + `BoxCollider`
 4. child objects under the source table are converted as root children after `-surface`

src/converter/objectConverters/tableConverter.test.ts

@@ -71,7 +71,7 @@ describe('convertTable', () => {
     expect(result.children).toHaveLength(2);
 
     const visual = result.children[0];
-    expect(visual.position).toEqual({ x: 10, y: 0, z: -5 });
+    expect(visual.position).toEqual({ x: 10, y: -0.0001, z: -5 });
     expect(visual.rotation).toEqual({ x: 90, y: 0, z: 0 });
     // QuadMesh + MeshRenderer + Material + StaticTexture2D + BoxCollider
     const collider = visual.components.find((c) => c.type === COMPONENT_TYPES.BOX_COLLIDER);

src/converter/objectConverters/tableConverter.ts

@@ -3,6 +3,8 @@ import { ResoniteObject, Vector3 } from '../../domain/ResoniteObject';
 import { ResoniteObjectBuilder } from '../ResoniteObjectBuilder';
 import { ImageAssetContext } from '../imageAssetContext';
 
+const TABLE_SURFACE_Y_OFFSET = -0.0001;
+
 export function convertTable(
   udonObj: GameTable,
   basePosition: Vector3,
@@ -25,7 +27,7 @@ export function convertTable(
     id: surfaceId,
     name: `${udonObj.name}-surface`,
   })
-    .setPosition({ x: udonObj.width / 2, y: 0, z: -udonObj.height / 2 })
+    .setPosition({ x: udonObj.width / 2, y: TABLE_SURFACE_Y_OFFSET, z: -udonObj.height / 2 })
     .setRotation({ x: 90, y: 0, z: 0 })
     .addQuadMesh({
       ...(textureIdentifier != null ? { textureIdentifier } : {}),