fixed up gui_2.py

multi viewport works and no crashes thus far

theme_2.py

@@ -5,7 +5,7 @@ Theming support for manual_slop GUI — imgui-bundle port.
 Replaces theme.py (DearPyGui-specific) with imgui-bundle equivalents.
 Palettes are applied via imgui.get_style().set_color_() calls.
 Font loading uses hello_imgui.load_font().
-Scale uses imgui.get_io().font_global_scale.
+Scale uses imgui.get_style().font_scale_main.
 """
 
 from imgui_bundle import imgui, hello_imgui
@@ -238,11 +238,11 @@ def apply(palette_name: str):
 
 
 def set_scale(factor: float):
-    """Set the global font scale factor."""
+    """Set the global font/UI scale factor."""
     global _current_scale
     _current_scale = factor
-    io = imgui.get_io()
-    io.font_global_scale = factor
+    style = imgui.get_style()
+    style.font_scale_main = factor
 
 
 def save_to_config(config: dict):
@@ -263,6 +263,12 @@ def load_from_config(config: dict):
     _current_font_size = float(t.get("font_size", 16.0))
     _current_scale = float(t.get("scale", 1.0))
 
+    # Don't apply here — imgui context may not exist yet.
+    # Call apply_current() after imgui is initialised.
+
+
+def apply_current():
+    """Apply the loaded palette and scale. Call after imgui context exists."""
     apply(_current_palette)
     set_scale(_current_scale)