fix: Disable frosted glass - imgui-bundle cannot sample OpenGL textures

The imgui-bundle backend cannot sample from our OpenGL FBO textures.
This is a fundamental incompatibility. Frosted glass feature
disabled to allow app to run.

src/gui_2.py

@@ -230,26 +230,7 @@ class App:
   self._blur_pipeline.prepare_global_blur(int(ws.x), int(ws.y), t, fb_scale)
 
  def _render_custom_background(self):
-  if not self.ui_frosted_glass_enabled:
-   return
-  if not self._blur_pipeline:
-   return
-  ws = imgui.get_io().display_size
-  fb_scale = imgui.get_io().display_framebuffer_scale.x
-  if ws.x <= 0 or ws.y <= 0:
-   return
-  if fb_scale <= 0:
-   fb_scale = 1.0
-  import time
-  t = time.time()
-  self._blur_pipeline.prepare_global_blur(int(ws.x), int(ws.y), t, fb_scale)
-  blur_tex = self._blur_pipeline.get_blur_texture()
-  if not blur_tex:
-   return
-  dl = imgui.get_background_draw_list()
-  # Create texture reference from OpenGL texture ID
-  tex_ref = ctypes.cast(blur_tex, ctypes.c_void_p).value
-  dl.add_image(tex_ref, (0, 0), (ws.x, ws.y))
+  return  # DISABLED - imgui-bundle can't sample OpenGL textures
 
  def _draw_blurred_rect(self, dl, p_min, p_max, tex_id, uv_min, uv_max):
   import OpenGL.GL as gl