add edit step + do recipe in main view, added carousel for recipe selection

frontend/views/list_select/item.py

@@ -0,0 +1,47 @@
+from typing import Callable, Tuple
+
+from PIL import ImageDraw
+
+
+RenderFn = Callable[[ImageDraw.ImageDraw, Tuple[int, int], str], None]
+
+
+class ListItem:
+    """A renderable item for use in ListView or CarouselView.
+
+    Each item carries a render function called as render_fn(draw, (x, y), fill).
+    An optional render_large_fn is used by CarouselView for a more prominent
+    display; it falls back to render_fn when not provided.
+    """
+
+    def __init__(self,
+                 render_fn: RenderFn,
+                 render_large_fn: RenderFn | None = None):
+        self._render_fn = render_fn
+        self._render_large_fn = render_large_fn
+
+    def render(self,
+               draw: ImageDraw.ImageDraw,
+               position: Tuple[int, int],
+               fill: str = 'black',
+               **kwargs):
+        """Render the item at normal (list) size.
+
+        Extra keyword arguments (e.g. ``font_size``) are forwarded to the
+        underlying render function.
+        """
+        self._render_fn(draw, position, fill, **kwargs)
+
+    def render_large(self,
+                     draw: ImageDraw.ImageDraw,
+                     position: Tuple[int, int],
+                     fill: str = 'black',
+                     **kwargs):
+        """Render the item at large (carousel) size.
+
+        Uses render_large_fn if provided, otherwise falls back to render_fn.
+        Extra keyword arguments (e.g. ``font_size``) are forwarded to the
+        underlying render function.
+        """
+        fn = self._render_large_fn or self._render_fn
+        fn(draw, position, fill, **kwargs)