fix(typesync): make dynamic import work on Windows

Problem
-------
`@effect/sql`’s File-system loader passes a raw Win32 path such as

  C:\project\apps\typesync\src\migrations\1_create_table__app.js

directly to `import()`.
On Windows the Node ESM loader interprets the leading
“C:” as a URL scheme and throws:

  Only URLs with a scheme in: file, data, and node are supported …
  Received protocol 'c:'

(Linux and macOS do not throw because the path starts with '/'.)

See Node issue: nodejs/node#31710
See Effect issue: Effect-TS/effect#4297

Fix
---
1. Keep `dir` as a *plain OS path* when calling
   `FileSystem.readDirectory(dir)` (still required by platform-fs).

2. Convert the specifier used by the dynamic `import()` to a **file URL**
   with `pathToFileURL(...).href`.

3. Extend the filename RegExp to accept both “/” and “\” separators.

Result
------
• Behaviour on POSIX remains unchanged.
• Migrations now load correctly on Windows.
• No other library code is touched; the change can be removed once the
  upstream patch is released.

Affected files:

 • apps/typesync/src/Database.ts – use fromFileSystem() helper
 • apps/typesync/src/Utils.ts – add fromFileSystem() helper

Author: JoMind

apps/typesync/src/Database.ts

@@ -6,13 +6,15 @@ import { Chunk, Console, Effect, Array as EffectArray, Layer, Option, Order, Sch
 
 import * as TypesyncDomain from '../domain/Domain.js';
 import * as Domain from './Domain.js';
+import { fromFileSystem } from './Utils.js';
 
 const SqlLive = SqliteClient.layer({
   filename: '.typesync.db',
 });
+
 const MigratorLive = Migrator.layer({
-  loader: Migrator.fromFileSystem(fileURLToPath(new URL('migrations', import.meta.url))),
-}).pipe(Layer.provide(SqlLive));
+  loader: fromFileSystem(fileURLToPath(new URL('migrations', import.meta.url))),
+}).pipe(Layer.provide(SqlLive))
 
 const DatabaseLive = Layer.mergeAll(SqlLive, MigratorLive).pipe(Layer.provide(NodeContext.layer));
 

apps/typesync/src/Utils.ts

@@ -125,3 +125,54 @@ export class InvalidInputError extends Data.TaggedError('/typesync/errors/Invali
   readonly input: string;
   readonly cause: unknown;
 }> {}
+
+/* ------------------------------------------------------------------ */
+/*  Windows-safe migration loader                                      */
+/* ------------------------------------------------------------------ */
+
+import { pathToFileURL } from "node:url"
+import { FileSystem } from "@effect/platform/FileSystem"
+import * as Effect from "effect/Effect"
+import type { Loader, ResolvedMigration } from "@effect/sql/Migrator"
+import { MigrationError } from "@effect/sql/Migrator"
+
+/**
+ * Patched version of
+ * `@effect/sql/Migrator/FileSystem.fromFileSystem`.
+ *
+ * The only difference is that the dynamic `import()` receives a proper
+ * `file://` URL, so it works on Windows as well as on Linux / macOS.
+ */
+export const fromFileSystem = (
+  dir: string,
+): Loader<FileSystem> =>
+  FileSystem.pipe(
+    /* read directory ----------------------------------------------------- */
+    Effect.flatMap((FS) => FS.readDirectory(dir)),
+    Effect.mapError(
+      (e) => new MigrationError({ reason: "failed", message: e.message }),
+    ),
+    /* build migration list ---------------------------------------------- */
+    Effect.map((files): ReadonlyArray<ResolvedMigration> =>
+      files
+        .flatMap((file) => {
+          const m =
+            file.match(/^(?:.*[\\/])?(\d+)_([^.]+)\.(js|ts)$/) // win/posix
+          if (!m) return []
+          const [basename, id, name] = m
+          return [
+            [
+              Number(id),
+              name,
+              Effect.promise(() =>
+                import(
+                  /* @vite-ignore */ /* webpackIgnore: true */
+                  pathToFileURL(`${dir}/${basename}`).href,
+                ),
+              ),
+            ],
+          ] as const
+        })
+        .sort(([a], [b]) => a - b),
+    ),
+  )