starting work on UI

src/ui/widgets/timeline.py

@@ -0,0 +1,27 @@
+from textual.containers import VerticalScroll, Horizontal
+from textual.app import ComposeResult
+
+
+class TimelineRow(Horizontal):
+    DEFAULT_CSS = """
+    TimelineRow {
+        background: $surface-lighten-1;
+        height: 8;
+        margin-bottom: 1;
+    }
+    """
+    
+    def compose(self) -> ComposeResult:
+        yield from ()
+
+class Timeline(VerticalScroll):
+    DEFAULT_CSS = """
+    Timeline {
+        padding: 1 0;
+        hatch: "-" $surface-lighten-1;
+    }
+    """
+    
+    def compose(self) -> ComposeResult:
+        yield TimelineRow()
+        yield TimelineRow()