fix: align pane bottoms and wrap navigation help

src/app.rs

@@ -159,10 +159,10 @@ impl App {
             );
             return;
         }
-        let [header, body, error_area] = Layout::vertical([
+        let [header, error_area, body] = Layout::vertical([
             Constraint::Length(1),
+            Constraint::Length(u16::from(self.error.is_some())),
             Constraint::Min(4),
-            Constraint::Length(1),
         ])
         .areas(area);
         frame.render_widget(
@@ -262,7 +262,7 @@ impl App {
         } else if self.page.rows.is_empty() {
             frame.render_widget(
                 Paragraph::new(if self.error.is_some() {
-                    "Could not load rows. See error below."
+                    "Could not load rows. See error above."
                 } else {
                     "No rows."
                 })
@@ -361,11 +361,12 @@ mod tests {
         )?;
         let mut app = super::App::new(crate::db::Database::open_sqlite(file.path())?)?;
         let mut terminal = ratatui::Terminal::new(ratatui::backend::TestBackend::new(100, 20))?;
-        for schema in [false, true] {
+        for (schema, error) in [(false, None), (true, None), (false, Some("Read failed"))] {
             app.show_schema = schema;
+            app.error = error.map(str::to_owned);
             terminal.draw(|frame| app.draw(frame, frame.area(), true))?;
             let buffer = terminal.backend().buffer();
-            let border: String = (0..100).map(|x| buffer[(x, 18)].symbol()).collect();
+            let border: String = (0..100).map(|x| buffer[(x, 19)].symbol()).collect();
             assert!(border.starts_with("└ main.comments [table]"), "{border}");
             assert!(border.ends_with('┘'), "{border}");
             assert!(border.contains(if schema {
@@ -373,6 +374,10 @@ mod tests {
             } else {
                 "rows 1–1"
             }));
+            if let Some(error) = error {
+                let message: String = (0..100).map(|x| buffer[(x, 1)].symbol()).collect();
+                assert!(message.starts_with(error), "{message}");
+            }
         }
         Ok(())
     }