Handle quantity ranges (e.g. 2-3) in Mealie and Tandoor clients

Both APIs require numeric quantity/amount fields. When a range like
"2-3" is detected, uses the first number as the quantity and puts
the full range (e.g. "2- 3 ek") in the note field.

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

app/tandoor.py

@@ -5,6 +5,25 @@ import re
 import requests
 
 
+def _parse_qty(qty_str: str) -> tuple[float, str]:
+    """Parse a quantity string, handling ranges like '2-3' or '6- 8'.
+
+    Returns (number, range_note) where range_note is the original range
+    string if the quantity is a range, or empty string if it's a plain number.
+    """
+    if not qty_str:
+        return (0, "")
+    try:
+        return (float(qty_str.replace(",", ".")), "")
+    except (ValueError, TypeError):
+        pass
+    m = re.match(r"^(\d+(?:[.,]\d+)?)\s*-\s*(\d+(?:[.,]\d+)?)$", qty_str.strip())
+    if m:
+        first = float(m.group(1).replace(",", "."))
+        return (first, qty_str.strip())
+    return (0, "")
+
+
 class TandoorClient:
     """Thin wrapper around the Tandoor REST API."""
 
@@ -184,11 +203,9 @@ class TandoorClient:
         has_structured = bool(qty_str or unit_str)
 
         if has_structured and food_str:
-            qty = 0
-            try:
-                qty = float(qty_str.replace(",", "."))
-            except (ValueError, TypeError):
-                pass
+            qty, range_note = _parse_qty(qty_str)
+            if range_note:
+                extra = f"{range_note} {unit_str}; {extra}".strip("; ") if extra else f"{range_note} {unit_str}".strip()
 
             return {
                 "food": {"name": food_str},