JB tools: transform some incorrectly sent empty strings in params to None

In Move and SafeDelete, the client might send an empty string instead of None

CHANGELOG.md

@@ -7,6 +7,9 @@ Status of the `main` branch. Changes prior to the next official version change w
   - Fix: Check for ignored path ignored `.git` folder only at the top level, not in every subdirectory (`Project._is_ignored_relative_path`) #1350
   - Fix: Duplicate comments in re-saved YAML configuration files #1285
 
+* JetBrains:
+  - `Move` and `SafeDelete` tools: transform empty string to None (counteracts client errors)
+
 * Dependencies:
   - `pywebview`: Switch back to official release (new version 6.2) #1253
 
@@ -20,10 +23,10 @@ Status of the `main` branch. Changes prior to the next official version change w
   - Fix: When scanning for `.gitignore` files, the presence of files that could not be made relative 
     to the project root would cause the scan to fail. #1317
 
-Dashboard:
+* Dashboard:
   - Fix handling of read news, saving each read news entry separately #1338
 
-JetBrains: 
+* JetBrains: 
   - Improve handling of `relative_path` parameter 
      - Improve its documentation to avoid usage errors
      - Replace escaped characters in `relative_path` with their unescaped counterparts (< and >)

src/serena/tools/jetbrains_tools.py

@@ -159,6 +159,9 @@ class JetBrainsMoveTool(Tool, ToolMarkerSymbolicEdit, ToolMarkerOptional, ToolMa
         :param target_relative_path: the relative path of the target directory or file.
         :param target_parent_name_path: the name path of the target parent symbol.
         """
+        name_path = name_path or None
+        target_relative_path = target_relative_path or None
+        target_parent_name_path = target_parent_name_path or None
         relative_path = self._sanitize_input_param(relative_path)
         with JetBrainsPluginClient.from_project(self.project) as client:
             response_dict = client.move(
@@ -199,6 +202,7 @@ class JetBrainsSafeDeleteTool(Tool, ToolMarkerSymbolicEdit, ToolMarkerOptional,
             remove symbols that become unused after the deletion. Default is False.
         """
         relative_path = self._sanitize_input_param(relative_path)
+        name_path = name_path or None
         with JetBrainsPluginClient.from_project(self.project) as client:
             response_dict = client.safe_delete(
                 name_path=name_path,