Fix performance, add screenshots, make banner scrollable

src/core/analysis.rs

@@ -117,6 +117,11 @@ pub fn run_background_analysis(id: i64, path: PathBuf, appimage_type: AppImageTy
         } else {
             Some(serde_json::to_string(&meta.desktop_actions).unwrap_or_default())
         };
+        let screenshot_urls_str = if meta.screenshot_urls.is_empty() {
+            None
+        } else {
+            Some(meta.screenshot_urls.join("\n"))
+        };
 
         if let Err(e) = db.update_appstream_metadata(
             id,
@@ -136,6 +141,7 @@ pub fn run_background_analysis(id: i64, path: PathBuf, appimage_type: AppImageTy
             release_json.as_deref(),
             actions_json.as_deref(),
             meta.has_signature,
+            screenshot_urls_str.as_deref(),
         ) {
             log::warn!("Failed to update appstream metadata for id {}: {}", id, e);
         }