feat(dashboard): "My Renders" page for users

- /dashboard/renders: user's own render jobs (live status + progress bar + cancel)
  and finished exports (thumbnail + size/duration + download); bilingual fa/en
- server lib my-renders.ts (user-scoped /v1/renders + /v1/exports via session JWT)
- user action routes: POST /api/renders/[id]/cancel, GET /api/exports/[id]/download
  (presigned URL)
- dashboard sidebar: "رندرهای من / My Renders" nav item

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

src/app/[locale]/dashboard/renders/page.tsx

@@ -0,0 +1,20 @@
+import type { Metadata } from "next";
+
+import { MyRenders } from "@/components/dashboard/MyRenders";
+import { ACTIVE_STEPS, listMyExports, listMyRenders } from "@/lib/api/my-renders";
+import { createPageMetadata } from "@/lib/metadata";
+
+export const metadata: Metadata = createPageMetadata({
+  title: "My Renders",
+  description: "Your render jobs and finished videos.",
+  path: "/dashboard/renders",
+});
+
+export const dynamic = "force-dynamic";
+
+export default async function MyRendersPage() {
+  const [allJobs, exports] = await Promise.all([listMyRenders(), listMyExports()]);
+  // Show active/failed jobs in the "processing" section; Done ones live as exports.
+  const jobs = allJobs.filter((j) => ACTIVE_STEPS.has(j.step) || j.step === "Failed");
+  return <MyRenders jobs={jobs} exports={exports} />;
+}