fix(gui): Guard against invalid display_size in blur pipeline init

- Remove _init_blur_pipeline call from _post_init (display_size not valid yet)
- Add dimension validation in _init_blur_pipeline (ws.x > 0 and ws.y > 0)
- Add fb_scale validation (default to 1.0 if <= 0)
- Lazy init only happens when frosted glass is enabled and dimensions are valid
- Fixes GLError 1281 'invalid value' crash on startup

src/gui_2.py

@@ -4039,24 +4039,33 @@ def hello():
 
  def _post_init(self) -> None:
   theme.apply_current()
-  self._init_blur_pipeline()
 
  def _init_blur_pipeline(self):
   if self._blur_pipeline is None:
    self._blur_pipeline = BlurPipeline()
   ws = imgui.get_io().display_size
   fb_scale = imgui.get_io().display_framebuffer_scale.x
+  if ws.x <= 0 or ws.y <= 0:
+   return False
+  if fb_scale <= 0:
+   fb_scale = 1.0
   self._blur_pipeline.setup_fbos(int(ws.x), int(ws.y), fb_scale)
   self._blur_pipeline.compile_deepsea_shader()
   self._blur_pipeline.compile_blur_shaders()
+  return True
 
  def _pre_new_frame(self) -> None:
   if not self.ui_frosted_glass_enabled:
    return
-  if self._blur_pipeline is None:
-   self._init_blur_pipeline()
   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
+  if self._blur_pipeline is None:
+   if not self._init_blur_pipeline():
+    return
   import time
   t = time.time()
   self._blur_pipeline.prepare_global_blur(int(ws.x), int(ws.y), t, fb_scale)