separate tui model and view layers

crates/tek_tui/src/tui_view_sequencer.rs

@@ -0,0 +1,20 @@
+use crate::*;
+
+impl Content for SequencerTui {
+    type Engine = Tui;
+    fn content (&self) -> impl Widget<Engine = Tui> {
+        lay!(
+            col!(
+                TransportView::from(self),
+                Split::right(20,
+                    widget(&PhrasesView(self)),
+                    widget(&PhraseView(self)),
+                ).min_y(20)
+            ),
+            self.perf.percentage()
+                .map(|cpu|format!("{cpu:.03}%"))
+                .fg(Color::Rgb(255,128,0))
+                .align_sw(),
+        )
+    }
+}