fix: Update test files to use current API patterns

Migrates test suite to current API:
- Frame(x, y, w, h) → Frame(pos=(x, y), size=(w, h))
- Caption("text", x, y) → Caption(pos=(x, y), text="text")
- caption.size → caption.font_size
- Entity(x, y, ...) → Entity((x, y), ...)
- Grid(w, h, ...) → Grid(grid_size=(w, h), ...)
- cell.color → ColorLayer system

Tests now serve as valid API usage examples.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/integration/interactive_visibility.py

@@ -19,33 +19,36 @@ mcrfpy.createScene("visibility_demo")
 grid = mcrfpy.Grid(grid_x=30, grid_y=20)
 grid.fill_color = mcrfpy.Color(20, 20, 30)  # Dark background
 
+# Add color layer for cell coloring
+color_layer = grid.add_layer("color", z_index=-1)
+
 # Initialize grid - all walkable and transparent
 for y in range(20):
     for x in range(30):
         cell = grid.at(x, y)
         cell.walkable = True
         cell.transparent = True
-        cell.color = mcrfpy.Color(100, 100, 120)  # Floor color
+        color_layer.set(x, y, mcrfpy.Color(100, 100, 120))  # Floor color
 
 # Create walls
 walls = [
     # Central cross
     [(15, y) for y in range(8, 12)],
     [(x, 10) for x in range(13, 18)],
-    
+
     # Rooms
     # Top-left room
     [(x, 5) for x in range(2, 8)] + [(8, y) for y in range(2, 6)],
     [(2, y) for y in range(2, 6)] + [(x, 2) for x in range(2, 8)],
-    
-    # Top-right room  
+
+    # Top-right room
     [(x, 5) for x in range(22, 28)] + [(22, y) for y in range(2, 6)],
     [(28, y) for y in range(2, 6)] + [(x, 2) for x in range(22, 28)],
-    
+
     # Bottom-left room
     [(x, 15) for x in range(2, 8)] + [(8, y) for y in range(15, 18)],
     [(2, y) for y in range(15, 18)] + [(x, 18) for x in range(2, 8)],
-    
+
     # Bottom-right room
     [(x, 15) for x in range(22, 28)] + [(22, y) for y in range(15, 18)],
     [(28, y) for y in range(15, 18)] + [(x, 18) for x in range(22, 28)],
@@ -57,12 +60,12 @@ for wall_group in walls:
             cell = grid.at(x, y)
             cell.walkable = False
             cell.transparent = False
-            cell.color = mcrfpy.Color(40, 20, 20)  # Wall color
+            color_layer.set(x, y, mcrfpy.Color(40, 20, 20))  # Wall color
 
 # Create entities
-player = mcrfpy.Entity(5, 10, grid=grid)
+player = mcrfpy.Entity((5, 10), grid=grid)
 player.sprite_index = 64  # @
-enemy = mcrfpy.Entity(25, 10, grid=grid)
+enemy = mcrfpy.Entity((25, 10), grid=grid)
 enemy.sprite_index = 69  # E
 
 # Update initial visibility
@@ -80,24 +83,24 @@ grid.position = (50, 100)
 grid.size = (900, 600)  # 30*30, 20*30
 
 # Title
-title = mcrfpy.Caption("Interactive Visibility Demo", 350, 20)
+title = mcrfpy.Caption(pos=(350, 20), text="Interactive Visibility Demo")
 title.fill_color = mcrfpy.Color(255, 255, 255)
 ui.append(title)
 
 # Info displays
-perspective_label = mcrfpy.Caption("Perspective: Omniscient", 50, 50)
+perspective_label = mcrfpy.Caption(pos=(50, 50), text="Perspective: Omniscient")
 perspective_label.fill_color = mcrfpy.Color(200, 200, 200)
 ui.append(perspective_label)
 
-controls = mcrfpy.Caption("WASD: Move player | Arrows: Move enemy | Tab: Cycle perspective | Space: Update visibility | R: Reset", 50, 730)
+controls = mcrfpy.Caption(pos=(50, 730), text="WASD: Move player | Arrows: Move enemy | Tab: Cycle perspective | Space: Update visibility | R: Reset")
 controls.fill_color = mcrfpy.Color(150, 150, 150)
 ui.append(controls)
 
-player_info = mcrfpy.Caption("Player: (5, 10)", 700, 50)
+player_info = mcrfpy.Caption(pos=(700, 50), text="Player: (5, 10)")
 player_info.fill_color = mcrfpy.Color(100, 255, 100)
 ui.append(player_info)
 
-enemy_info = mcrfpy.Caption("Enemy: (25, 10)", 700, 70)
+enemy_info = mcrfpy.Caption(pos=(700, 70), text="Enemy: (25, 10)")
 enemy_info.fill_color = mcrfpy.Color(255, 100, 100)
 ui.append(enemy_info)