feat: imgage feature

backend/uframe/measure.py

@@ -8,9 +8,10 @@ from uframe.ir import (
     Gauge, Sparkline, Status, Table,
     Form, Field, Password, Radio, Checkbox, FormButton,
     Let, Source, IfBlock, ForLoop, CacheControl, OnSubmit, StateDecl,
-    BigTitle,
+    BigTitle, ImageNode,
 )
 from uframe.fonts import FONT_HEIGHTS, get_text_width
+from uframe.imaging import get_image_height
 
 
 def _text_height(text: str, width: int) -> int:
@@ -245,6 +246,15 @@ def measure(node: IRNode, available_width: int) -> None:
         node.pref_height = 1
         node.min_height = 1
 
+    elif isinstance(node, ImageNode):
+        h = get_image_height(node.path, node.mode, node.img_width)
+        if node.caption:
+            h += 1  # extra line for caption
+        node.pref_width = available_width
+        node.min_width = node.img_width
+        node.pref_height = h
+        node.min_height = 1
+
     elif isinstance(node, BigTitle):
         # Try the requested font, fall back to smaller if too wide
         tw = get_text_width(node.text, node.font)