feat: imgage feature

backend/uframe/ir.py

@@ -361,6 +361,18 @@ class StateDecl(IRNode):
 # Components (Phase 8)
 # ---------------------------------------------------------------------------
 
+@dataclass
+class ImageNode(IRNode):
+    """Image converted to character art."""
+    path: str = ""
+    mode: str = "braille"    # braille, block, ascii, halfblock
+    img_width: int = 30
+    dither: str = "floyd"    # floyd, threshold, none
+    invert: bool = False
+    use_color: bool = False
+    caption: str = ""
+
+
 @dataclass
 class BigTitle(IRNode):
     """Large multi-line ASCII art text."""