v1.7.8: usa ingredienti dalla chat

- Nuovo endpoint chat_extract_recipe: Gemini estrae solo nomi+quantità
  con prompt minimo (nessun inventario nel prompt → niente troncamento),
  poi PHP fuzzy-match contro l'inventario completo identico a generateRecipe
- Frontend: _looksLikeRecipe() rileva risposte chat con ricetta;
  bottone '🥄 Usa ingredienti' appare sotto la bubble, chiama chatExtractIngredients()
  che mostra pannello inline con pulsanti '📦 Usa' per ogni ingrediente in dispensa
- useRecipeIngredient() riusato 1:1 con fallback _chatRecipeTitle per le note
- Stili CSS: btn-chat-use-recipe, chat-recipe-panel, chat-recipe-panel-container
- Chiavi i18n: use_ingredients_btn, recipe_ingredients_from_pantry (it/en/de)

translations/en.json

@@ -471,7 +471,9 @@
         "suggestion_snack_text": "What can I make for a quick snack?",
         "suggestion_juice_text": "Make me a juice or smoothie with what I have",
         "suggestion_light_text": "I'm hungry but want something light",
-        "suggestion_expiry_text": "What's about to expire and how can I use it?"
+        "suggestion_expiry_text": "What's about to expire and how can I use it?",
+        "use_ingredients_btn": "Use ingredients",
+        "recipe_ingredients_from_pantry": "Ingredients found in pantry"
     },
     "cooking": {
         "close": "Close",