feat: enhance AnthropicAgent with start_coordinate handling and modifier key support

- Added support for an optional start_coordinate parameter to facilitate drag actions from a specified starting point.
- Implemented validation for start_coordinate to ensure it is a tuple of two integers.
- Enhanced click actions to handle modifier keys, allowing for more complex interactions.
- Ensured existing code logic remains unchanged while improving functionality and usability.

mm_agents/anthropic/main.py

@@ -101,6 +101,7 @@ class AnthropicAgent:
         
         text = function_args.get("text")
         coordinate = function_args.get("coordinate")
+        start_coordinate = function_args.get("start_coordinate")
         scroll_direction = function_args.get("scroll_direction")
         scroll_amount = function_args.get("scroll_amount")
         duration = function_args.get("duration")
@@ -111,6 +112,11 @@ class AnthropicAgent:
                 int(coordinate[0] * self.resize_factor[0]),
                 int(coordinate[1] * self.resize_factor[1])
             )
+        if start_coordinate and self.resize_factor:
+            start_coordinate = (
+                int(start_coordinate[0] * self.resize_factor[0]),
+                int(start_coordinate[1] * self.resize_factor[1])
+            )
         
         if action == "left_mouse_down":
             result += "pyautogui.mouseDown()\n"
@@ -145,6 +151,16 @@ class AnthropicAgent:
                 )
                 expected_outcome = f"Mouse moved to ({x},{y})."
             elif action == "left_click_drag":
+                # If start_coordinate is provided, validate and move to start before dragging
+                if start_coordinate:
+                    if not isinstance(start_coordinate, (list, tuple)) or len(start_coordinate) != 2:
+                        raise ValueError(f"{start_coordinate} must be a tuple of length 2")
+                    if not all(isinstance(i, int) for i in start_coordinate):
+                        raise ValueError(f"{start_coordinate} must be a tuple of ints")
+                    start_x, start_y = start_coordinate[0], start_coordinate[1]
+                    result += (
+                        f"pyautogui.moveTo({start_x}, {start_y}, duration={duration or 0.5})\n"
+                    )
                 result += (
                     f"pyautogui.dragTo({x}, {y}, duration={duration or 0.5})\n"
                 )
@@ -209,6 +225,12 @@ class AnthropicAgent:
 
         # Handle click actions
         elif action in ("left_click", "right_click", "double_click", "middle_click", "left_press", "triple_click"):
+            # Handle modifier keys during click if specified
+            if text:
+                keys = text.split('+')
+                for key in keys:
+                    key = key.strip().lower()
+                    result += f"pyautogui.keyDown('{key}')\n"
             if coordinate is not None:
                 x, y = coordinate
                 if action == "left_click":
@@ -241,6 +263,12 @@ class AnthropicAgent:
                     result += ("pyautogui.mouseUp()\n")
                 elif action == "triple_click":
                     result += ("pyautogui.tripleClick()\n")
+            # Release modifier keys after click
+            if text:
+                keys = text.split('+')
+                for key in reversed(keys):
+                    key = key.strip().lower()
+                    result += f"pyautogui.keyUp('{key}')\n"
             expected_outcome = "Click action finished"
             
         elif action == "wait":