Extract and apply StartupWMClass for proper taskbar icons

src/core/database.rs

@@ -1749,6 +1749,14 @@ impl Database {
         Ok(())
     }
 
+    pub fn set_startup_wm_class(&self, id: i64, wm_class: Option<&str>) -> SqlResult<()> {
+        self.conn.execute(
+            "UPDATE appimages SET startup_wm_class = ?2 WHERE id = ?1",
+            params![id, wm_class],
+        )?;
+        Ok(())
+    }
+
     // --- Launch statistics ---
 
     pub fn get_top_launched(&self, limit: i32) -> SqlResult<Vec<(String, u64)>> {