fix(tasks): remove non-functional reminder write params (v1.1.2)

Exhaustive FW_DEBUG investigation on both Free and Premium accounts
confirmed that taskupdate2 silently ignores all reminder fields regardless
of encoding (flat, JSON-string, PHP-bracket, all variants). Alternative
endpoints (tasksetalert etc.) are unregistered. Root cause: mobile app
Service Worker transforms reminder requests in ways not reproducible via
direct API calls. Reminders remain read-only. Recurrency write confirmed
working (flat encoding). Docs updated with full investigation findings.

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

src/mcp_familywall/server.py

@@ -930,15 +930,17 @@ def update_task(
     recurrency_interval: int | None = None,
     rrule: str | None = None,
     clear_recurrency: bool = False,
-    reminder_unit: str | None = None,
-    reminder_value: int | None = None,
-    clear_reminder: bool = False,
 ) -> str:
     """Update an existing task's fields.
 
     IMPORTANT: Ask the user for confirmation before calling this tool.
     At least one parameter besides *task_id* must be provided.
 
+    NOTE: Setting or clearing reminders is **not supported** via this tool.
+    The Family Wall API does not accept reminder writes through ``taskupdate2``
+    — reminder updates are handled exclusively by the mobile app's Service
+    Worker and cannot be replicated via direct API calls.
+
     Args:
         task_id: Task metaId from get_tasks.
         text: New title text (omit to leave unchanged).
@@ -967,14 +969,6 @@ def update_task(
             Overrides simple recurrency fields when set.
         clear_recurrency: Set to ``True`` to remove the recurrence rule from the task.
             Cannot be used together with *recurrency*.
-        reminder_unit: Unit for the reminder offset — ``"MINUTE"``, ``"HOUR"``, or
-            ``"DAY"``. Must be provided together with *reminder_value*. Requires a
-            *due_date* to be set on the task.
-        reminder_value: Offset before the due date/time (e.g. ``0`` = at the time,
-            ``15`` = 15 min before, ``1`` with unit ``"DAY"`` = 1 day before).
-            Must be provided together with *reminder_unit*.
-        clear_reminder: Set to ``True`` to remove the reminder from the task.
-            Cannot be used together with *reminder_unit*/*reminder_value*.
 
     Returns:
         JSON success indicator or an error message.
@@ -983,12 +977,6 @@ def update_task(
         return _err("'clear_due_date' and 'due_date' cannot be used together.")
     if clear_recurrency and recurrency is not None:
         return _err("'clear_recurrency' and 'recurrency' cannot be used together.")
-    if clear_reminder and (reminder_unit is not None or reminder_value is not None):
-        return _err(
-            "'clear_reminder' cannot be used together with 'reminder_unit'/'reminder_value'."
-        )
-    if (reminder_unit is None) != (reminder_value is None):
-        return _err("'reminder_unit' and 'reminder_value' must be provided together.")
 
     if (
         text is None
@@ -1000,14 +988,11 @@ def update_task(
         and list_id is None
         and recurrency is None
         and not clear_recurrency
-        and reminder_unit is None
-        and not clear_reminder
     ):
         return _err(
             "At least one of 'text', 'description', 'category_id', 'due_date',"
-            " 'clear_due_date', 'assignee_ids', 'list_id', 'recurrency',"
-            " 'clear_recurrency', 'reminder_unit'/'reminder_value', or"
-            " 'clear_reminder' must be provided."
+            " 'clear_due_date', 'assignee_ids', 'list_id', 'recurrency', or"
+            " 'clear_recurrency' must be provided."
         )
 
     params: dict[str, Any] = {"metaId": task_id}
@@ -1027,9 +1012,7 @@ def update_task(
     if list_id is not None:
         params["taskListId"] = list_id
 
-    # The FiZ Ai() encoder serialises all fields flat at the top level of the
-    # request body — nested objects are NOT supported.  recurrencyDescriptor and
-    # reminder fields must therefore be sent as plain top-level parameters.
+    # Recurrency fields are sent flat at the top level (verified: FiZ Ai() encoder).
     if clear_recurrency:
         params["recurrency"] = "NONE"
     elif recurrency is not None:
@@ -1039,17 +1022,6 @@ def update_task(
         if rrule is not None:
             params["rrule"] = rrule
 
-    if clear_reminder:
-        params["reminderUnit"] = ""
-        params["reminderValue"] = 0
-        params["reminderType"] = "SNOOZE"
-        params["localId"] = 0
-    elif reminder_unit is not None and reminder_value is not None:
-        params["reminderUnit"] = reminder_unit
-        params["reminderValue"] = reminder_value
-        params["reminderType"] = "SNOOZE"
-        params["localId"] = 0
-
     try:
         _authenticated_call("taskupdate2", params)
     except RuntimeError as exc: