feat: big title

backend/uframe/measure.py

@@ -8,7 +8,9 @@ from uframe.ir import (
     Gauge, Sparkline, Status, Table,
     Form, Field, Password, Radio, Checkbox, FormButton,
     Let, Source, IfBlock, ForLoop, CacheControl, OnSubmit, StateDecl,
+    BigTitle,
 )
+from uframe.fonts import FONT_HEIGHTS, get_text_width
 
 
 def _text_height(text: str, width: int) -> int:
@@ -243,6 +245,22 @@ def measure(node: IRNode, available_width: int) -> None:
         node.pref_height = 1
         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)
+        if tw <= available_width:
+            h = FONT_HEIGHTS.get(node.font, 6)
+        elif get_text_width(node.text, "pixel") <= available_width:
+            h = FONT_HEIGHTS.get("pixel", 3)
+        elif get_text_width(node.text, "thin") <= available_width:
+            h = FONT_HEIGHTS.get("thin", 3)
+        else:
+            h = 1  # fallback to single styled line
+        node.pref_width = available_width
+        node.min_width = 1
+        node.pref_height = h
+        node.min_height = 1
+
     elif isinstance(node, (Let, Source, CacheControl, StateDecl)):
         # Zero-height metadata nodes — no visual output
         node.pref_width = 0