Switch auth to plain-text password env var (remove bcrypt)

- Replace ADMIN_PASSWORD_HASH with ADMIN_PASSWORD in auth route and docker-compose
- Remove bcryptjs / @types/bcryptjs dependencies
- Delete scripts/hashPassword.ts (no longer needed)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/src/api/client.ts

@@ -101,6 +101,8 @@ const modules = {
     }>
   ) => put<Module>(`/modules/${id}`, data),
   delete: (id: string) => del<null>(`/modules/${id}`),
+  move: (id: string, rackId: string, uPosition: number) =>
+    post<Module>(`/modules/${id}/move`, { rackId, uPosition }),
   getPorts: (id: string) => get<Port[]>(`/modules/${id}/ports`),
 };