feat(markdown): implement table rendering with imgui.begin_table

tests/test_markdown_table_render.py

@@ -0,0 +1,20 @@
+from unittest.mock import patch
+from src.markdown_table import parse_tables, render_table, TableBlock
+
+def test_render_table_invokes_begin_table(app_instance):
+ with patch("src.markdown_table.imgui") as mock_imgui:
+  mock_imgui.TableFlags_ = type("T", (), {"borders": 1, "row_bg": 2, "resizable": 4})()
+  mock_imgui.begin_table.return_value = True
+  block = TableBlock(headers=["A", "B"], rows=[["1", "2"]], span=(0, 3))
+  render_table(block)
+  assert mock_imgui.begin_table.called
+  args, _ = mock_imgui.begin_table.call_args
+  assert args[0] == "md_table"
+  assert args[1] == 2
+  assert mock_imgui.end_table.called
+
+def test_render_table_skips_when_no_columns():
+ with patch("src.markdown_table.imgui") as mock_imgui:
+  block = TableBlock(headers=[], rows=[], span=(0, 1))
+  render_table(block)
+  assert not mock_imgui.begin_table.called