chore(void): drop no-op backslash normalization on pathe relative() paths (#252)

## What

This removes the `.replace(/\\/g, '/')` calls that were applied to the
results of pathe `relative()` and `join()` across seven files. The
source files are codegen/env-types.ts, codegen/project-tsconfig.ts,
drizzle/config.ts, drizzle/discover.ts, ssr/entry.ts, and sveltekit.ts,
and the same no-op appeared in a test/unit/prerender.test.ts assertion,
for nine occurrences in total.

## Why

pathe returns POSIX forward slash paths on every platform, including
Windows, so calling `.replace(/\\/g, '/')` on a pathe `relative()` or
`join()` result can never match anything. It is dead defensive code.
codegen/route-types.ts and codegen/queue-types.ts already follow this
convention and omit the call, so this brings the rest of the package in
line.

## Safety

There is no behavior change. It was verified empirically that pathe
`relative()` returns forward slashes for both POSIX and Windows
backslash inputs, so `relative('C:\\a\\b\\.void',
'C:\\a\\b\\src\\env.ts')` returns `../src/env.ts`. The six other
`.replace(/\\/g, '/')` calls in the package operate on raw path
parameters rather than pathe output. Those live in shared/utils.ts (the
slash helper), router/parse-filename.ts, router/websocket.ts,
cli/package.ts, and prerender.ts, and they are intentionally left
untouched because they normalize real OS separators.

## Verification

The void package typechecks cleanly with tsgo and passes oxlint. The net
change is nine insertions and nine deletions across seven files with no
functional effect.

Author: shulaoda

packages/void/src/codegen/env-types.ts

@@ -47,7 +47,7 @@ export type EnvTypesResult = {
  * @param outDir Absolute path to the project's `.void/` directory.
  */
 export function generateEnvTypes(envFileAbs: string, outDir: string): EnvTypesResult {
-  const importPath = relative(outDir, envFileAbs).replace(/\\/g, '/');
+  const importPath = relative(outDir, envFileAbs);
   const lines: Array<string> = [];
 
   lines.push('// Auto-generated by void — do not edit');

packages/void/src/codegen/project-tsconfig.ts

@@ -64,8 +64,8 @@ export function createProjectTsconfig(
       const isDir = existsSync(pathsConfig.schemaDir) && !existsSync(pathsConfig.schemaFile);
 
       // Paths are relative to .void/ (where this tsconfig lives), so use ../
-      const schemaRel = relative(outDir, pathsConfig.schemaDir).replace(/\\/g, '/');
-      const schemaFileRel = relative(outDir, pathsConfig.schemaFile).replace(/\\/g, '/');
+      const schemaRel = relative(outDir, pathsConfig.schemaDir);
+      const schemaFileRel = relative(outDir, pathsConfig.schemaFile);
       paths['@schema'] = [isDir ? `${schemaRel}/index.ts` : schemaFileRel];
       paths['@schema/*'] = [`${schemaRel}/*`];
     }

packages/void/src/drizzle/config.ts

@@ -31,14 +31,14 @@ export function writeDrizzleConfig(
       ? {
           dialect: 'postgresql',
           schema: schemaSpecifier(schema, root),
-          out: `./${relative(root, paths.migrationsDir).replace(/\\/g, '/')}`,
+          out: `./${relative(root, paths.migrationsDir)}`,
           migrations: { prefix: 'timestamp' },
           dbCredentials: { url: dbPath },
         }
       : {
           dialect: 'sqlite',
           schema: schemaSpecifier(schema, root),
-          out: `./${relative(root, paths.migrationsDir).replace(/\\/g, '/')}`,
+          out: `./${relative(root, paths.migrationsDir)}`,
           migrations: { prefix: 'timestamp' },
           dbCredentials: { url: dbPath },
         };

packages/void/src/drizzle/discover.ts

@@ -39,6 +39,6 @@ export function schemaSpecifier(location: SchemaLocation, root?: string): string
   if (!root) {
     return location.type === 'file' ? './db/schema.ts' : './db/schema/*.ts';
   }
-  const rel = relative(root, location.path).replace(/\\/g, '/');
+  const rel = relative(root, location.path);
   return location.type === 'file' ? `./${rel}` : `./${rel}/*.ts`;
 }

packages/void/src/ssr/entry.ts

@@ -39,7 +39,7 @@ function resolveSingleEntry(
 ): ResolvedEntry | null {
   const matches = entries
     .map((entryName) => ({
-      relativePath: relative(root, join(paths.ssrDir, entryName)).replace(/\\/g, '/'),
+      relativePath: relative(root, join(paths.ssrDir, entryName)),
       absolutePath: join(paths.ssrDir, entryName),
     }))
     .filter((entry) => existsSync(entry.absolutePath));

packages/void/src/sveltekit.ts

@@ -104,7 +104,7 @@ function resolveTsconfigEntry(baseDir: string, entry: string): string {
 }
 
 function relativeFrom(fromDir: string, target: string): string {
-  const value = relative(fromDir, target).replace(/\\/g, '/');
+  const value = relative(fromDir, target);
   return value.startsWith('.') ? value : `./${value}`;
 }
 

packages/void/test/unit/prerender.test.ts

@@ -81,7 +81,7 @@ describe('collectPrerenderWorkerModules', () => {
 
     expect(
       modules.map(({ path, type }) => ({
-        path: relative(workerDir, path).replace(/\\/g, '/'),
+        path: relative(workerDir, path),
         type,
       })),
     ).toEqual([