feat: TUI Phase 1 common widgets + scoring/path beads

crates/lore-tui/src/state/timeline.rs

@@ -0,0 +1,12 @@
+#![allow(dead_code)]
+
+//! Timeline screen state.
+
+use crate::message::TimelineEvent;
+
+/// State for the timeline screen.
+#[derive(Debug, Default)]
+pub struct TimelineState {
+    pub events: Vec<TimelineEvent>,
+    pub scroll_offset: u16,
+}