feat: dynamic mode

backend/uframe/measure.py

@@ -6,6 +6,8 @@ from uframe.ir import (
     IRNode, Page, Box, Row, Col, Spacer, Pad,
     Heading, Text, Label, Divider, Link, ListNode, ListItem,
     Gauge, Sparkline, Status, Table,
+    Form, Field, Password, Radio, Checkbox, FormButton,
+    Let, Source, IfBlock, ForLoop, CacheControl, OnSubmit, StateDecl,
 )
 
 
@@ -195,13 +197,70 @@ def measure(node: IRNode, available_width: int) -> None:
         node.min_height = 1
 
     elif isinstance(node, Table):
-        # Height = header border + header row + separator + data rows + bottom border
         num_rows = len(node.rows)
         node.pref_width = available_width
-        node.min_width = len(node.columns) * 3 + 1  # minimum 3 chars per col + borders
-        node.pref_height = num_rows + 4  # top border + header + separator + rows + bottom border
+        node.min_width = len(node.columns) * 3 + 1
+        node.pref_height = num_rows + 4
         node.min_height = 4
 
+    elif isinstance(node, Form):
+        total_h = 0
+        for child in node.children:
+            measure(child, available_width)
+            total_h += child.pref_height
+        node.pref_width = available_width
+        node.min_width = 10
+        node.pref_height = total_h
+        node.min_height = total_h
+
+    elif isinstance(node, Field):
+        node.pref_width = available_width
+        node.min_width = len(node.field_name) + node.field_width + 6
+        node.pref_height = 1
+        node.min_height = 1
+
+    elif isinstance(node, Password):
+        node.pref_width = available_width
+        node.min_width = len(node.field_name) + node.field_width + 6
+        node.pref_height = 1
+        node.min_height = 1
+
+    elif isinstance(node, Radio):
+        node.pref_width = available_width
+        node.min_width = len(node.group) + sum(len(o) + 6 for o in node.options)
+        node.pref_height = 1
+        node.min_height = 1
+
+    elif isinstance(node, Checkbox):
+        node.pref_width = available_width
+        node.min_width = len(node.checkbox_label) + 6
+        node.pref_height = 1
+        node.min_height = 1
+
+    elif isinstance(node, FormButton):
+        node.pref_width = available_width
+        node.min_width = len(node.button_label) + 6
+        node.pref_height = 1
+        node.min_height = 1
+
+    elif isinstance(node, (Let, Source, CacheControl, StateDecl)):
+        # Zero-height metadata nodes — no visual output
+        node.pref_width = 0
+        node.min_width = 0
+        node.pref_height = 0
+        node.min_height = 0
+
+    elif isinstance(node, (IfBlock, ForLoop, OnSubmit)):
+        # Container nodes — height = sum of children
+        total_h = 0
+        for child in node.children:
+            measure(child, available_width)
+            total_h += child.pref_height
+        node.pref_width = available_width
+        node.min_width = 1
+        node.pref_height = total_h
+        node.min_height = 0
+
     else:
         # Generic: just measure children
         total_h = 0