fix(upload): bump middlewareClientMaxBodySize to 100mb

Next 16 caps any request body that flows through middleware at 10MB by
default. Our auth middleware matches every path, so /jobs/:id POSTs from
the file upload form hit 'Request body exceeded 10MB / Unexpected end of
form' the moment a user picked anything bigger than ~10MB total — the
server action never even ran.

serverActions.bodySizeLimit alone isn't enough; the new
middlewareClientMaxBodySize knob (Next 16) is the one that gates
middleware-handled bodies. Set both to 100mb so the 30MB-per-file bucket
limit is what actually matters.

The key isn't in NextConfig's TS types yet (Next 16.1), so it's assigned
via a narrow cast on the side rather than dropped into the object literal.

Also added console.log/error breadcrumbs to uploadJobFilesAction so the
next mystery upload failure shows up in the dev server log immediately
instead of silently bouncing back as 'Bağlantı hatası'.

next.config.ts

@@ -61,4 +61,10 @@ const nextConfig: NextConfig = {
   },
 };
 
+// Next 16 caps middleware-passed request bodies at 10MB by default. Our auth
+// middleware sees every request including job-file uploads — without this
+// override, multipart uploads larger than 10MB return "Unexpected end of
+// form". The key isn't in NextConfig's TS types yet (Next 16.1).
+(nextConfig as NextConfig & { middlewareClientMaxBodySize?: string }).middlewareClientMaxBodySize = "100mb";
+
 export default nextConfig;

src/lib/appwrite/job-file-actions.ts

@@ -81,6 +81,7 @@ export async function uploadJobFilesAction(
   if (!job) return { ok: false, error: "İş bulunamadı." };
 
   const files = formData.getAll("files").filter((v): v is File => v instanceof File && v.size > 0);
+  console.log("[uploadJobFilesAction] jobId=%s files=%d total=%dB", jobId, files.length, files.reduce((s, f) => s + f.size, 0));
   if (files.length === 0) {
     return { ok: false, error: "Dosya seçin." };
   }
@@ -143,6 +144,7 @@ export async function uploadJobFilesAction(
       changes: { count: files.length },
     });
   } catch (e) {
+    console.error("[uploadJobFilesAction] failed", e);
     // Rollback: best-effort cleanup of partially uploaded files and rows.
     for (const id of createdRowIds) {
       try {