Support configurable Vite base for admin path or subdomain deploys.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/App.tsx

@@ -12,7 +12,7 @@ import { ReportagePage } from "./pages/ReportagePage";
 
 export default function App() {
   return (
-    <BrowserRouter>
+    <BrowserRouter basename={import.meta.env.BASE_URL.replace(/\/$/, "")}>
       <Routes>
         <Route path="/login" element={<LoginPage />} />
 

apps/admin/vite.config.ts

@@ -3,6 +3,9 @@ import react from "@vitejs/plugin-react";
 
 export default defineConfig({
   plugins: [react()],
+  // Production one-VM path deploy: VITE_BASE=/admin/
+  // Subdomain deploy can omit this (defaults to /).
+  base: process.env.VITE_BASE ?? "/",
   server: {
     host: "127.0.0.1",
     port: 5173,