Edit page: auto-expand step textareas, wider layout, image management

- Textareas auto-resize to fit content (min 120px)
- Edit page container widened to 1100px
- Show recipe image with URL input and file upload options
- Add image upload endpoint (POST /api/recipes/<backend>/<id>/image)
- Add upload_image_bytes() to both Mealie and Tandoor clients

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

app/main.py

@@ -349,6 +349,39 @@ def api_update_recipe(backend, recipe_id):
         return jsonify({"ok": False, "error": str(exc)})
 
 
+@app.route("/api/recipes/<backend>/<path:recipe_id>/image", methods=["POST"])
+def api_upload_image(backend, recipe_id):
+    """AJAX — upload an image file to a recipe."""
+    cfg = config.load()
+    if "image" not in request.files:
+        return jsonify({"ok": False, "error": "Nincs fájl."})
+    file = request.files["image"]
+    if not file.filename:
+        return jsonify({"ok": False, "error": "Nincs fájl."})
+
+    content_type = file.content_type or "image/jpeg"
+    image_data = file.read()
+
+    try:
+        if backend == "mealie":
+            if not cfg.get("mealie_url") or not cfg.get("mealie_api_key"):
+                return jsonify({"ok": False, "error": "Mealie nincs beállítva."})
+            client = MealieClient(cfg["mealie_url"], cfg["mealie_api_key"],
+                                  api_url=config.MEALIE_INTERNAL_URL)
+            client.upload_image_bytes(recipe_id, image_data, content_type)
+        elif backend == "tandoor":
+            if not cfg.get("tandoor_url") or not cfg.get("tandoor_api_key"):
+                return jsonify({"ok": False, "error": "Tandoor nincs beállítva."})
+            client = TandoorClient(cfg["tandoor_url"], cfg["tandoor_api_key"],
+                                    api_url=config.TANDOOR_INTERNAL_URL)
+            client.upload_image_bytes(int(recipe_id), image_data, content_type)
+        else:
+            return jsonify({"ok": False, "error": "Ismeretlen backend."})
+        return jsonify({"ok": True, "message": "Kép feltöltve."})
+    except Exception as exc:
+        return jsonify({"ok": False, "error": str(exc)})
+
+
 @app.route("/api/recipes/<backend>/delete", methods=["POST"])
 def api_delete_recipes(backend):
     """AJAX — delete one or more recipes."""