feat: due_date, assignee_ids, list_id for create_task/update_task (v0.4.14)

- create_task: new optional params due_date (ISO 8601) and assignee_ids (list[str])
- update_task: new optional params due_date, assignee_ids, and list_id (move task)
- get_tasks: returns due_date and assignee_ids fields per task
- API params verified via FW_DEBUG=1: dueDate, assignee, taskListId
- SPEC.md, README, CLAUDE.md updated

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/mcp_familywall/server.py

@@ -326,6 +326,8 @@ def get_tasks(list_id: str, only_open: bool = True):
                 "description": task.get("description"),
                 "completed": completed,
                 "category_id": task.get("taskCategoryId"),
+                "due_date": task.get("dueDate"),
+                "assignee_ids": task.get("assigneeIds") or [],
             }
         )
 
@@ -676,6 +678,8 @@ def create_task(
     text: str,
     description: str | None = None,
     category_id: str | None = None,
+    due_date: str | None = None,
+    assignee_ids: list[str] | None = None,
 ) -> str:
     """Create a new task in the given list.
 
@@ -688,6 +692,9 @@ def create_task(
         category_id: Optional category metaId from get_categories
             (e.g. ``taskCategory/23431854_200``). Only meaningful for
             shopping lists; ignored for TODO lists.
+        due_date: Optional due date in ISO 8601 format (e.g. ``"2026-04-30T18:00:00"``).
+        assignee_ids: Optional list of member IDs from get_members to assign the task
+            (e.g. ``["23431898"]``). Empty list assigns to nobody.
 
     Returns:
         JSON with the new task's metaId on success, or an error message.
@@ -697,6 +704,10 @@ def create_task(
         params["description"] = description
     if category_id:
         params["taskCategoryId"] = category_id
+    if due_date is not None:
+        params["dueDate"] = due_date
+    if assignee_ids is not None:
+        params["assignee"] = assignee_ids if assignee_ids else ""
 
     try:
         data = _authenticated_call("taskcreate2", params)
@@ -728,11 +739,14 @@ def update_task(
     text: str | None = None,
     description: str | None = None,
     category_id: str | None = None,
+    due_date: str | None = None,
+    assignee_ids: list[str] | None = None,
+    list_id: str | None = None,
 ) -> str:
-    """Update the text, description, and/or category of an existing task.
+    """Update an existing task's fields.
 
     IMPORTANT: Ask the user for confirmation before calling this tool.
-    At least one of *text*, *description*, or *category_id* must be provided.
+    At least one parameter besides *task_id* must be provided.
 
     Args:
         task_id: Task metaId from get_tasks.
@@ -741,12 +755,26 @@ def update_task(
         category_id: New category metaId from get_categories
             (e.g. ``taskCategory/23431854_200``). Only meaningful for
             shopping lists; ignored for TODO lists.
+        due_date: New due date in ISO 8601 format (e.g. ``"2026-04-30T18:00:00"``).
+            Omit to leave unchanged.
+        assignee_ids: New list of member IDs from get_members (e.g. ``["23431898"]``).
+            Pass an empty list to remove all assignees. Omit to leave unchanged.
+        list_id: Move the task to a different list by providing the target list ID
+            from get_lists (e.g. ``"taskList/23431854_29740942"``). Omit to keep in
+            current list.
 
     Returns:
         JSON success indicator or an error message.
     """
-    if text is None and description is None and category_id is None:
-        return "Error: At least one of 'text', 'description', or 'category_id' must be provided."
+    if (
+        text is None
+        and description is None
+        and category_id is None
+        and due_date is None
+        and assignee_ids is None
+        and list_id is None
+    ):
+        return "Error: At least one of 'text', 'description', 'category_id', 'due_date', 'assignee_ids', or 'list_id' must be provided."
 
     params: dict[str, Any] = {"metaId": task_id}
     if text is not None:
@@ -755,6 +783,12 @@ def update_task(
         params["description"] = description
     if category_id is not None:
         params["taskCategoryId"] = category_id
+    if due_date is not None:
+        params["dueDate"] = due_date
+    if assignee_ids is not None:
+        params["assignee"] = assignee_ids if assignee_ids else ""
+    if list_id is not None:
+        params["taskListId"] = list_id
 
     try:
         _authenticated_call("taskupdate2", params)