fix(admin): auto-promote uploaded AEP to the render bucket on attach

Uploading an .aep/.zip in the template editor only set content.projects.aep_file_url
(a user-uploads reference) — it never copied the file to templates/{id}/ where the
render node-agent's claim looks. Result: uploaded templates weren't renderable.

attachAep now also POSTs /v1/template-bundles/{project_id} {source_url} after saving
the reference, which server-side-copies the file into templates/{id}/(bundle.zip|
template.aep). Uploading a template now makes it immediately renderable.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/admin/TemplatesAdmin.tsx

@@ -103,15 +103,35 @@ export function TemplatesAdmin() {
     setSavingProj(null);
   };
 
-  // Attach an uploaded After Effects file (+ composition) to a project.
+  // Attach an uploaded After Effects file (+ composition) to a project, then PROMOTE
+  // it into the render bucket so render nodes can actually use it. Two steps:
+  //   1. PATCH /projects/{id}/aep  — record aep_file_url + comp on the content project
+  //   2. POST  /template-bundles/{id} — copy the uploaded .aep/.zip into
+  //      templates/{id}/(bundle.zip|template.aep) where the node-agent claim looks.
+  // Without step 2 the upload is only a reference and renders fail / fall back to mock.
   const attachAep = async (p: Proj, url: string) => {
     setSavingProj(p.id); setError(null);
     const res = await fetch(api(`projects/${p.id}/aep`), {
       method: "PATCH", headers: { "Content-Type": "application/json" },
       body: JSON.stringify({ aep_file_url: url, render_aep_comp: p.render_aep_comp || "flatrender" }),
     });
-    if (res.ok) { updateProj(p.id, { aep_file_url: url }); }
-    else { const d = await res.json().catch(() => null); setError(d?.error ?? "اتصال فایل AE ناموفق بود"); }
+    if (!res.ok) {
+      const d = await res.json().catch(() => null);
+      setError(d?.error ?? "اتصال فایل AE ناموفق بود");
+      setSavingProj(null);
+      return;
+    }
+    updateProj(p.id, { aep_file_url: url });
+
+    // Promote to the render templates bucket (makes it renderable on nodes).
+    const promote = await fetch(api(`template-bundles/${p.id}`), {
+      method: "POST", headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ source_url: url }),
+    });
+    if (!promote.ok) {
+      const d = await promote.json().catch(() => null);
+      setError(d?.message ?? d?.error ?? "آماده‌سازی فایل برای رندر ناموفق بود (فایل ذخیره شد ولی هنوز قابل رندر نیست).");
+    }
     setSavingProj(null);
   };