C内核流量计算方法优化，前端文件名称读取优化

frontend/tests/e2e/fit-view.spec.ts

@@ -1,5 +1,5 @@
 import { expect, test, type Page } from "@playwright/test";
-import { existsSync, readFileSync } from "node:fs";
+import { readFileSync } from "node:fs";
 import { fileURLToPath } from "node:url";
 import {
   expectAllNodesInsideCanvas,
@@ -22,12 +22,9 @@ type ImportedProject = {
   edges: ImportedProjectEdge[];
 };
 
-const MQL_8_PROJECT_PATHS = [
-  new URL("../../../tests/data/test-mql-8%20.json", import.meta.url),
-  new URL("../../../tests/data/test-mql-8.json", import.meta.url),
-].map(fileURLToPath);
-const MQL_8_PROJECT_PATH =
-  MQL_8_PROJECT_PATHS.find(existsSync) ?? MQL_8_PROJECT_PATHS[0];
+const MQL_8_PROJECT_PATH = fileURLToPath(
+  new URL("../../../tests/fixtures/legacy/test-mql-8.json", import.meta.url),
+);
 const mql8Project = JSON.parse(
   readFileSync(MQL_8_PROJECT_PATH, "utf8"),
 ) as ImportedProject;