feat: auto-open generated images and videos in OS viewer (#244)

* feat: add inline image and video rendering in terminal UI

Use sharp to render images as half-block character grids directly
in the terminal when media tool results are displayed, with ffmpeg
fallback for video thumbnail extraction.

* feat: auto-open generated media in OS viewer instead of inline rendering

Replace pixelated half-block terminal image rendering with native OS
viewer (`open` on macOS, `xdg-open` on Linux). Generated images and
videos now open automatically in full quality. Remove sharp dependency
and inline rendering utilities.

* bump version

* fix: use execFile instead of exec to prevent shell injection

* fix: remove auto-open from MediaToolResultView, keep only in MediaAutoOpenView

package.json

@@ -1,6 +1,6 @@
 {
   "name": "grok-dev",
-  "version": "1.1.4-rc5",
+  "version": "1.1.4",
   "description": "An open-source AI coding agent powered by Grok, built with Bun and OpenTUI.",
   "type": "module",
   "main": "dist/index.js",

src/ui/app.tsx

@@ -3941,6 +3941,9 @@ function MessageView({
       }
 
       if ((entry.toolResult?.media?.length ?? 0) > 0) {
+        if (name === "generate_image" || name === "generate_video") {
+          return <MediaAutoOpenView t={t} label={toolLabel(entry.toolCall!)} toolResult={entry.toolResult!} />;
+        }
         return <MediaToolResultView t={t} label={toolLabel(entry.toolCall!)} toolResult={entry.toolResult!} />;
       }
 
@@ -4378,6 +4381,35 @@ function ToolTextOutputView({ t, label, content }: { t: Theme; label: string; co
   );
 }
 
+function openMediaFile(filePath: string): void {
+  try {
+    const cmd = process.platform === "darwin" ? "open" : "xdg-open";
+    require("child_process").execFile(cmd, [filePath]);
+  } catch {}
+}
+
+function MediaAutoOpenView({ t, label, toolResult }: { t: Theme; label: string; toolResult: ToolResult }) {
+  const media = toolResult.media ?? [];
+  const openedRef = useRef<Set<string>>(new Set());
+
+  useEffect(() => {
+    for (const asset of media) {
+      if (!openedRef.current.has(asset.path)) {
+        openedRef.current.add(asset.path);
+        openMediaFile(asset.path);
+      }
+    }
+  }, [media]);
+
+  return (
+    <box gap={0}>
+      <InlineTool t={t} pending={false}>
+        {label}
+      </InlineTool>
+    </box>
+  );
+}
+
 function MediaToolResultView({ t, label, toolResult }: { t: Theme; label: string; toolResult: ToolResult }) {
   const media = toolResult.media ?? [];