feat(mma): Finalize Orchestrator Integration and fix all regressions

project_manager.py

@@ -170,11 +170,23 @@ def load_history(project_path: str | Path) -> dict:
     return {}
 
 
+def clean_nones(data):
+    """Recursively remove None values from a dictionary/list."""
+    if isinstance(data, dict):
+        return {k: clean_nones(v) for k, v in data.items() if v is not None}
+    elif isinstance(data, list):
+        return [clean_nones(v) for v in data if v is not None]
+    return data
+
+
 def save_project(proj: dict, path: str | Path, disc_data: dict | None = None):
     """
     Save the project TOML.
     If 'discussion' is present in proj, it is moved to the sibling history file.
     """
+    # Clean None values as TOML doesn't support them
+    proj = clean_nones(proj)
+
     # Ensure 'discussion' is NOT in the main project dict
     if "discussion" in proj:
         # If disc_data wasn't provided, use the one from proj
@@ -188,6 +200,7 @@ def save_project(proj: dict, path: str | Path, disc_data: dict | None = None):
         tomli_w.dump(proj, f)
         
     if disc_data:
+        disc_data = clean_nones(disc_data)
         hist_path = get_history_path(path)
         with open(hist_path, "wb") as f:
             tomli_w.dump(disc_data, f)