完善资源画布无限坐标与分页交互

调整资源分页画布 viewport 与复位按钮交互

允许资源元素使用 -1,000,000 到 1,000,000 的持久化坐标

同步 TypeScript、Rust 合同、布局校验与负坐标回归测试

更新资源画布 PRD 与技术方案

保留本地 .env 未提交

packages/shared/src/contracts/gameCreationApp.ts

@@ -471,6 +471,7 @@ export interface GameCreationAppAssetManifestEntry {
 export const GAME_CREATION_RESOURCE_LAYOUT_SCHEMA_VERSION =
   'game-creator-resource-layout.v1' as const;
 export const GAME_CREATION_RESOURCE_LAYOUT_MAX_SAFE_REVISION = 9_007_199_254_740_991;
+export const GAME_CREATION_RESOURCE_LAYOUT_MIN_COORDINATE = -1_000_000;
 export const GAME_CREATION_RESOURCE_LAYOUT_MAX_COORDINATE = 1_000_000;
 
 export function isSafeProjectResourceCanvasLayoutRevision(
@@ -490,7 +491,7 @@ export function isSafeProjectResourceCanvasCoordinate(
   return (
     typeof value === 'number' &&
     Number.isSafeInteger(value) &&
-    value >= 0 &&
+    value >= GAME_CREATION_RESOURCE_LAYOUT_MIN_COORDINATE &&
     value <= GAME_CREATION_RESOURCE_LAYOUT_MAX_COORDINATE
   );
 }