feat(meal-planner): add add_meal_note tool (v0.11.5)

New write tool using mpmealput endpoint to create meal/ note entries
with optional free-text and serving count. Response structure verified
from JS-bundle (Sg class); a00.r.r is a plain object (unlike mpcreate).
Structured output matches get_meal_plan meal entry format.

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

src/mcp_familywall/__init__.py

@@ -1 +1 @@
-__version__ = "0.11.4"
+__version__ = "0.11.5"

src/mcp_familywall/server.py

@@ -2499,6 +2499,79 @@ def delete_meal_plan_entry(entry_id: str) -> str:
     return json.dumps({"deleted": True, "id": entry_id}, ensure_ascii=False, indent=2)
 
 
+# ---------------------------------------------------------------------------
+# Tool: add_meal_note
+# ---------------------------------------------------------------------------
+
+
+@mcp.tool()
+def add_meal_note(
+    date: str,
+    meal_type: str,
+    note: str | None = None,
+    serves: int | None = None,
+) -> str:
+    """Add a note and/or serving count to a meal plan slot.
+
+    IMPORTANT: Ask the user for confirmation before calling this tool.
+
+    Creates a ``meal/`` entry for the given date and meal type.
+    At least one of ``note`` or ``serves`` must be provided.
+
+    Args:
+        date:      Target date in ISO format (e.g. ``"2026-04-20"``).
+        meal_type: Meal slot — one of ``"BREAKFAST"``, ``"LUNCH"``,
+            ``"SNACK"``, or ``"DINNER"``.
+        note:      Optional free-text note (e.g. ``"Bitte ohne Zwiebeln"``).
+        serves:    Optional number of servings as integer (e.g. ``4``).
+
+    Returns:
+        JSON with the new meal entry on success, or an error message.
+    """
+    if meal_type not in ("BREAKFAST", "LUNCH", "SNACK", "DINNER"):
+        return "Error: meal_type must be one of 'BREAKFAST', 'LUNCH', 'SNACK', 'DINNER'."
+    if note is None and serves is None:
+        return "Error: At least one of 'note' or 'serves' must be provided."
+
+    params: dict[str, Any] = {"date": date, "type": meal_type}
+    if note is not None:
+        params["note"] = note
+    if serves is not None:
+        params["serves"] = str(serves)  # API expects string (int→string)
+
+    try:
+        data = _authenticated_call("mpmealput", params)
+    except RuntimeError as exc:
+        return f"Error: {exc}"
+
+    try:
+        meal = data["a00"]["r"]["r"]
+        if not isinstance(meal, dict) or "metaId" not in meal:
+            raise TypeError("unexpected shape")
+    except (KeyError, TypeError):
+        return json.dumps(
+            {"warning": "Unexpected mpmealput response structure", "raw": data},
+            ensure_ascii=False,
+            indent=2,
+        )
+
+    rights = meal.get("rights") or {}
+    raw_serves = meal.get("serves")
+    result: dict[str, Any] = {
+        "id": meal.get("metaId"),
+        "date": meal.get("date"),
+        "type": meal.get("type"),
+        "name": None,
+        "recipe_id": None,
+        "is_from_recipe_box": None,
+        "note": meal.get("note") or None,
+        "serves": int(raw_serves) if raw_serves is not None else None,
+        "can_update": rights.get("canUpdate") == "true",
+        "can_delete": rights.get("canDelete") == "true",
+    }
+    return json.dumps(result, ensure_ascii=False, indent=2)
+
+
 # ---------------------------------------------------------------------------
 # Factory
 # ---------------------------------------------------------------------------