feat: refresh update status on every dev reload

VERSION

@@ -1 +1 @@
-1.6.0
+1.6.0

app/api/system/update-status/route.ts

@@ -1,11 +1,20 @@
 import { NextResponse } from 'next/server';
-import { loadState } from '@/lib/version-check';
+import { checkOnce, loadState } from '@/lib/version-check';
 
 // Public endpoint that returns the latest cached update status. Fed by the
-// background scheduler started in instrumentation.node.ts; we never trigger
-// a fresh upstream fetch from this route, so an unauthenticated client cannot
-// use it to amplify traffic to the version server.
+// background scheduler started in instrumentation.node.ts; in production we
+// never trigger a fresh upstream fetch from this route so an unauthenticated
+// client can't use it to amplify traffic to the version server.
+//
+// In development we force a fresh fetch on every hit so changes to the
+// version server's overrides take effect on the next page reload instead of
+// requiring a dev-server restart. The 5s upstream timeout in fetchStatus
+// caps the worst-case latency added to a dev reload.
 export async function GET() {
+  if (process.env.NODE_ENV === 'development') {
+    await checkOnce({ reason: 'dev-reload' });
+  }
+
   const state = await loadState();
   return NextResponse.json(
     {