feat(claudbg-wxdt): left-truncate project path in TUI session list

Pass project_max directly to truncate_project instead of project_max+30,
so the function (not ratatui's right-clip) controls truncation — showing
the end of the path (e.g. …/foo/bar) rather than the beginning.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/tui/screens/session_list.rs

@@ -73,12 +73,13 @@ pub fn render_session_list(f: &mut Frame, area: Rect, state: &AppState) {
 
     // Compute the max width available for the project column so we can truncate.
     // Fixed widths: 8+20+20+6+7 = 61, plus 5 separators = 66, plus 2 borders = 68.
-    // Use 30 chars as a safe default; the Min constraint will expand it.
+    // Use 10 chars as a minimum; the Min constraint will expand it.
+    // We pass this exact value to truncate_project so it left-truncates before
+    // ratatui ever sees the string — ensuring the *end* of the path is shown.
     let project_max: usize = table_area
         .width
         .saturating_sub(68) // subtract fixed columns + separators + borders
         .max(10) as usize;
-    let project_display_max = project_max + 30; // generous — actual render clips
 
     // Apply active filter to the session rows.
     let active_filter = Filter::parse(&state.filter_active).ok();
@@ -96,7 +97,7 @@ pub fn render_session_list(f: &mut Frame, area: Rect, state: &AppState) {
     let rows: Vec<Row> = filtered_sessions
         .iter()
         .map(|s| {
-            let project = truncate_project(&s.project, project_display_max);
+            let project = truncate_project(&s.project, project_max);
             Row::new(vec![
                 s.short_id.clone(),
                 s.date.clone(),