Fix critical issues: script loading, entity types, and color properties

- Issue #37: Fix Windows scripts subdirectory not checked
  - Updated executeScript() to use executable_path() from platform.h
  - Scripts now load correctly when working directory differs from executable

- Issue #76: Fix UIEntityCollection returns wrong type
  - Updated UIEntityCollectionIter::next() to check for stored Python object
  - Derived Entity classes now preserve their type when retrieved from collections

- Issue #9: Recreate RenderTexture when resized (already fixed)
  - Confirmed RenderTexture recreation already implemented in set_size() and set_float_member()
  - Uses 1.5x padding and 4096 max size limit

- Issue #79: Fix Color r, g, b, a properties return None
  - Implemented get_member() and set_member() in PyColor.cpp
  - Color component properties now work correctly with proper validation

- Additional fix: Grid.at() method signature
  - Changed from METH_O to METH_VARARGS to accept two arguments

All fixes include comprehensive tests to verify functionality.

closes #37, closes #76, closes #9, closes #79

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.archive/issue78_middle_click_fix_test.py

@@ -0,0 +1,87 @@
+#!/usr/bin/env python3
+"""Test that Issue #78 is fixed - Middle Mouse Click should NOT send 'C' keyboard event"""
+import mcrfpy
+from mcrfpy import automation
+import sys
+
+# Track events
+keyboard_events = []
+click_events = []
+
+def keyboard_handler(key):
+    """Track keyboard events"""
+    keyboard_events.append(key)
+    print(f"Keyboard event received: '{key}'")
+    
+def click_handler(x, y, button):
+    """Track click events"""
+    click_events.append((x, y, button))
+    print(f"Click event received: ({x}, {y}, button={button})")
+
+def test_middle_click_fix(runtime):
+    """Test that middle click no longer sends 'C' key event"""
+    print(f"\n=== Testing Issue #78 Fix (runtime: {runtime}) ===")
+    
+    # Simulate middle click
+    print("\nSimulating middle click at (200, 200)...")
+    automation.middleClick(200, 200)
+    
+    # Also test other clicks for comparison
+    print("Simulating left click at (100, 100)...")
+    automation.click(100, 100)
+    
+    print("Simulating right click at (300, 300)...")
+    automation.rightClick(300, 300)
+    
+    # Wait a moment for events to process
+    mcrfpy.setTimer("check_results", check_results, 500)
+
+def check_results(runtime):
+    """Check if the bug is fixed"""
+    print(f"\n=== Results ===")
+    print(f"Keyboard events received: {len(keyboard_events)}")
+    print(f"Click events received: {len(click_events)}")
+    
+    # Check if 'C' was incorrectly triggered
+    if 'C' in keyboard_events or 'c' in keyboard_events:
+        print("\n✗ FAIL - Issue #78 still exists: Middle click triggered 'C' keyboard event!")
+        print(f"Keyboard events: {keyboard_events}")
+    else:
+        print("\n✓ PASS - Issue #78 is FIXED: No spurious 'C' keyboard event from middle click!")
+    
+    # Take screenshot
+    filename = f"issue78_fixed_{int(runtime)}.png"
+    automation.screenshot(filename)
+    print(f"\nScreenshot saved: {filename}")
+    
+    # Cleanup and exit
+    mcrfpy.delTimer("check_results")
+    sys.exit(0)
+
+# Set up test scene
+print("Setting up test scene...")
+mcrfpy.createScene("issue78_test")
+mcrfpy.setScene("issue78_test")
+ui = mcrfpy.sceneUI("issue78_test")
+
+# Register keyboard handler
+mcrfpy.keypressScene(keyboard_handler)
+
+# Create a clickable frame
+frame = mcrfpy.Frame(50, 50, 400, 400,
+                    fill_color=mcrfpy.Color(100, 150, 200),
+                    outline_color=mcrfpy.Color(255, 255, 255),
+                    outline=3.0)
+frame.click = click_handler
+ui.append(frame)
+
+# Add label
+caption = mcrfpy.Caption(mcrfpy.Vector(100, 100),
+                        text="Issue #78 Test - Middle Click",
+                        fill_color=mcrfpy.Color(255, 255, 255))
+caption.size = 24
+ui.append(caption)
+
+# Schedule test
+print("Scheduling test to run after render loop starts...")
+mcrfpy.setTimer("test", test_middle_click_fix, 1000)