Store nutrition per serving, and check the estimate before sending it

Recipes imported from a video caption have no nutrition data, so the values
have to be estimated. Mealie will accept anything: the fields are free-text
strings, a misspelt key is dropped silently, and a whole-recipe total looks
exactly like a per-serving one. The recipe page then renders whatever landed
as fact.

patch_recipe now validates a nutrition block first. Keys must be Mealie's own,
so a number cannot vanish into "carbs". Values are normalized to bare numbers,
matching how the library already stores them. Energy is checked against the
macros with the Atwater factors (4/9/4 kcal per gram) and refused if it is
more than 25% off, which is what catches an arithmetic slip.

Nutrition is per serving, and the text import left recipeServings at 0 --- it
set only the free-text recipeYield, so "4-6 personer" gave Mealie no number to
divide by or scale with. import_recipe_text now also sets recipeServings, from
the lower bound of a range, which is how this library already stores
"10-12 personer" (recipeServings 10). patch_recipe refuses nutrition while the
count is still missing, and accepts it when the same patch supplies it.

verify_recipe fails an import that has no nutrition, or has values without a
serving count.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

mealie_mcp/verify.py

@@ -179,6 +179,21 @@ def verify_recipe(
     else:
         checks.append(_check("taxonomy", "fail", "No categories or tags, and no skip reason given"))
 
+    nutrition = {k: v for k, v in (recipe.get("nutrition") or {}).items() if v}
+    servings = recipe.get("recipeServings") or 0
+    if not servings:
+        # Mealie's figures are per serving, so nutrition without a serving count
+        # is a number without a denominator.
+        nutrition_status: Status = "fail"
+        nutrition_detail = "No recipeServings, so per-serving nutrition cannot be read"
+    elif not nutrition:
+        nutrition_status = "fail"
+        nutrition_detail = "No nutrition values"
+    else:
+        nutrition_status = "pass"
+        nutrition_detail = f"{len(nutrition)} value(s) per serving, {servings:g} serving(s)"
+    checks.append(_check("nutrition", nutrition_status, nutrition_detail))
+
     source = recipe.get("orgURL") or (recipe.get("extras") or {}).get("source")
     checks.append(
         _check(