feat(meal-planner): add delete_meal_plan_entry tool (v0.11.4)

Reuses the existing metadelete endpoint (already used for tasks and
recipes). Validates that entry_id starts with 'dish/' or 'meal/' before
calling the API. SPEC.md updated to reflect metadelete's broader scope.

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

src/mcp_familywall/server.py

@@ -2463,6 +2463,42 @@ def add_meal_to_meal_plan(
     return json.dumps(result, ensure_ascii=False, indent=2)
 
 
+# ---------------------------------------------------------------------------
+# Tool: delete_meal_plan_entry
+# ---------------------------------------------------------------------------
+
+
+@mcp.tool()
+def delete_meal_plan_entry(entry_id: str) -> str:
+    """Permanently delete a meal plan entry (dish or meal).
+
+    IMPORTANT: Ask the user for confirmation before calling this tool.
+
+    Works for both ``dish/...`` entries (planned meals/recipes) and
+    ``meal/...`` entries (notes/servings).  Use ``get_meal_plan`` to
+    retrieve entry IDs.
+
+    Args:
+        entry_id: Entry metaId from get_meal_plan
+            (e.g. ``"dish/16282169_20009811"`` or ``"meal/16282169_1620659"``).
+
+    Returns:
+        JSON success indicator or an error message.
+    """
+    if not entry_id.startswith(("dish/", "meal/")):
+        return (
+            "Error: entry_id must be a dish or meal metaId "
+            "(e.g. 'dish/16282169_20009811' or 'meal/16282169_1620659')."
+        )
+
+    try:
+        _authenticated_call("metadelete", {"id": entry_id})
+    except RuntimeError as exc:
+        return f"Error: {exc}"
+
+    return json.dumps({"deleted": True, "id": entry_id}, ensure_ascii=False, indent=2)
+
+
 # ---------------------------------------------------------------------------
 # Factory
 # ---------------------------------------------------------------------------