fix(02-02): cost 守卫允许 Infinity，仅拦 NaN 与负数

packages-user/data-system/src/path/finder.ts

@@ -136,13 +136,14 @@ export class PathfindingFinder implements IPathfinder {
     }
 
     /**
-     * 获取进入指定位置节点的损失，损失值不是有限数字或为负数时告警并按损失 1 处理
+     * 获取进入指定位置节点的损失，损失值为 NaN 或负数时告警并按损失 1 处理，
+     * Infinity 为合法损失值
      * @param block 位置信息
      */
     private getNodeCost(block: ILayerLocation): number {
         if (!this.cost) return 1;
         const value = this.cost(block);
-        if (!Number.isFinite(value) || value < 0) {
+        if (Number.isNaN(value) || value < 0) {
             logger.warn(174);
             return 1;
         }

packages-user/data-system/src/path/system.test.ts

@@ -410,6 +410,27 @@ describe('pathfinding system', () => {
         expect(result.ret).toHaveLength(2);
     });
 
+    // 验证 Infinity 是合法损失值：不告警且路径绕开高损失格
+    it('allows Infinity as a legitimate cost without warning', () => {
+        const fixture = createSystem([1, 1, 1, 1, 1, 1, 1, 1, 1], 3);
+        injectPredicate(fixture);
+        const cost: PathCostFunction = block =>
+            block.locator.x === 1 && block.locator.y === 1
+                ? Number.POSITIVE_INFINITY
+                : 1;
+        fixture.system.finder.useCostFunction(cost);
+
+        const result = modules.logger.catch(() =>
+            fixture.system.finder.find({ x: 0, y: 1 }, { x: 2, y: 1 })
+        );
+
+        expect(result.info.map(info => info.code)).not.toContain(174);
+        expect(result.ret).toHaveLength(4);
+        for (const step of result.ret) {
+            expect(step.to).not.toEqual({ x: 1, y: 1 });
+        }
+    });
+
     // 验证不可达目标返回空数组且不移动对象
     it('returns an empty path and never moves for unreachable targets', () => {
         const fixture = createSystem([1, 6, 1, 1, 6, 1, 1, 6, 1], 3);

packages/common/src/logger.json

@@ -239,6 +239,6 @@
         "171": "Event id '$1' not found in event store, event will be skipped.",
         "172": "Event returned non-boolean value '$1' during reduction. JavaScript short-circuit semantics will be used.",
         "173": "Pathfinding input is invalid or a required binding (map state, map layer) is missing. An empty result will be returned.",
-        "174": "Pathfinding cost function returned a negative value. Default cost 1 will be used instead."
+        "174": "Pathfinding cost function returned a negative or NaN value. Default cost 1 will be used instead."
     }
 }