fix(windows): make native coverage graph portable

scripts/client-tsconfig.spec.ts

@@ -1,7 +1,7 @@
 /** Regression coverage for source declarations owned by the client test aggregate. */
 
 import { existsSync, readdirSync } from 'node:fs'
-import { resolve } from 'node:path'
+import { resolve, sep } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import ts from 'typescript'
 import { describe, expect, it } from 'vitest'
@@ -14,6 +14,7 @@ function clientCssDeclarations(): string[] {
     .filter(entry => entry.isDirectory())
     .map(entry => resolve(clientRoot, entry.name, 'src/css-modules.d.ts'))
     .filter(existsSync)
+    .map(file => file.replaceAll(sep, '/'))
     .sort()
 }
 
@@ -26,6 +27,7 @@ describe('client TypeScript aggregate', () => {
     }
     const parsed = ts.parseJsonConfigFileContent(read.config, ts.sys, root)
     const loaded = parsed.fileNames
+      .map(file => file.replaceAll(sep, '/'))
       .filter(file => file.endsWith('/src/css-modules.d.ts'))
       .sort()
     expect(loaded).toEqual(clientCssDeclarations())