feat(studio): open rendered video in new tab on row click

Clicking a completed render row now opens the video inline in the
browser instead of forcing a download. Added /render/:jobId/view
endpoint with Content-Disposition: inline so the browser plays the
video natively. Download button is preserved on hover for explicit
saves. stopPropagation on action buttons prevents row click conflicts.

packages/core/src/studio-api/routes/render.ts

@@ -126,6 +126,27 @@ export function registerRenderRoutes(api: Hono, adapter: StudioApiAdapter): void
     });
   });
 
+  // Serve render inline (for in-browser playback — opens in a new tab)
+  api.get("/render/:jobId/view", (c) => {
+    const { jobId } = c.req.param();
+    const job = renderJobs.get(jobId);
+    if (!job?.outputPath || !existsSync(job.outputPath)) {
+      return c.json({ error: "not found" }, 404);
+    }
+    const isWebm = job.outputPath.endsWith(".webm");
+    const contentType = isWebm ? "video/webm" : "video/mp4";
+    const filename = job.outputPath.split("/").pop() ?? `render.mp4`;
+    const content = readFileSync(job.outputPath);
+    return new Response(content, {
+      headers: {
+        "Content-Type": contentType,
+        "Content-Disposition": `inline; filename="${filename}"`,
+        "Accept-Ranges": "bytes",
+        "Content-Length": String(content.length),
+      },
+    });
+  });
+
   // Download render
   api.get("/render/:jobId/download", (c) => {
     const { jobId } = c.req.param();

packages/studio/src/components/renders/RenderQueueItem.tsx

@@ -25,18 +25,34 @@ export const RenderQueueItem = memo(function RenderQueueItem({
 }: RenderQueueItemProps) {
   const [hovered, setHovered] = useState(false);
 
-  const handleDownload = useCallback(() => {
-    const a = document.createElement("a");
-    a.href = `/api/render/${job.id}/download`;
-    a.download = job.filename;
-    a.click();
-  }, [job.id, job.filename]);
+  const handleOpen = useCallback(() => {
+    window.open(`/api/render/${job.id}/view`, "_blank");
+  }, [job.id]);
+
+  const handleDownload = useCallback(
+    (e: React.MouseEvent) => {
+      e.stopPropagation();
+      const a = document.createElement("a");
+      a.href = `/api/render/${job.id}/download`;
+      a.download = job.filename;
+      a.click();
+    },
+    [job.id, job.filename],
+  );
+
+  const isClickable = job.status === "complete";
 
   return (
     <div
       onPointerEnter={() => setHovered(true)}
       onPointerLeave={() => setHovered(false)}
-      className="px-3 py-2.5 border-b border-neutral-800/30 last:border-0"
+      onClick={isClickable ? handleOpen : undefined}
+      className={[
+        "px-3 py-2.5 border-b border-neutral-800/30 last:border-0 transition-colors duration-150",
+        isClickable ? "cursor-pointer hover:bg-neutral-800/30" : "",
+      ]
+        .filter(Boolean)
+        .join(" ")}
     >
       <div className="flex items-center gap-2">
         {/* Status indicator */}
@@ -113,7 +129,10 @@ export const RenderQueueItem = memo(function RenderQueueItem({
               </button>
             )}
             <button
-              onClick={onDelete}
+              onClick={(e) => {
+                e.stopPropagation();
+                onDelete();
+              }}
               className="p-1 rounded text-neutral-500 hover:text-red-400 transition-colors"
               title="Remove"
             >