feat(icons): apply logo_new.png to all apps and watermarks

ostp-flutter/pubspec.yaml

@@ -58,7 +58,7 @@ dev_dependencies:
 flutter_launcher_icons:
   android: "launcher_icon"
   ios: false
-  image_path: "../icons/sqare.png"
+  image_path: "../icons/logo_new.png"
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec

ostp-gui/src/index.html

@@ -14,7 +14,7 @@
 
     <!-- Eagle watermark — behind everything, every screen -->
     <div class="watermark" aria-hidden="true">
-      <img src="assets/logo.svg" alt="" />
+      <img src="assets/logo.png" alt="" />
     </div>
 
     <!-- ── HOME SCREEN ──────────────────────────────────────── -->