OBJ then local

app/api/files/[...key]/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import fs from "fs";
 import path from "path";
-import { generateHetznerStreamUrl } from "@/lib/storage";
+import { generateHetznerStreamUrl, hetznerKeyExists } from "@/lib/storage";
 
 // ── Tuning constants ──────────────────────────────────────────────────────────
 //
@@ -45,21 +45,20 @@ export async function GET(
     return new NextResponse("Forbidden", { status: 403 });
   }
 
-  // Single stat() replaces the previous existsSync() + statSync() (2 → 1
-  // syscall). The try/catch also catches ENOENT, EACCES, ENAMETOOLONG, etc.
+  // ── Hetzner first, local disk fallback ───────────────────────────────────
+  // Check object storage first (all new uploads go there directly; migrated
+  // files live there too). Results are cached in process memory after the
+  // first check so subsequent range requests pay no extra latency.
+  // Fall back to local disk only for files that haven't been migrated yet.
   let stat: fs.Stats;
   try {
-    stat = fs.statSync(filePath);
-  } catch {
-    // File not on local disk — attempt a redirect to Hetzner object storage.
-    // This covers files uploaded after the migration and any migrated files
-    // whose local copies have been removed.
-    try {
+    if (await hetznerKeyExists(relativePath)) {
       const hetznerUrl = await generateHetznerStreamUrl(relativePath, 3600);
       return NextResponse.redirect(hetznerUrl, 302);
-    } catch {
-      return new NextResponse("Not found", { status: 404 });
     }
+    stat = fs.statSync(filePath);
+  } catch {
+    return new NextResponse("Not found", { status: 404 });
   }
 
   // Guard against directory traversal that resolves to a directory