feat(kebab-tui): p9-fb-24 task 6 — render_status_bar (version + pane + docs + idle)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-tui/tests/status_bar.rs

@@ -0,0 +1,82 @@
+//! p9-fb-24: integration tests for the always-visible status bar.
+
+use kebab_config::Config;
+use kebab_tui::{App, Pane};
+use ratatui::Terminal;
+use ratatui::backend::TestBackend;
+use ratatui::layout::Rect;
+
+fn fresh_app(focus: Pane) -> App {
+    let mut config = Config::defaults();
+    config.storage.data_dir = "/tmp/kebab-tui-status-bar-tests-noop".to_string();
+    config.workspace.root = "/tmp/kebab-tui-status-bar-tests-noop/workspace".to_string();
+    let mut app = App::new(config).expect("App::new");
+    app.focus = focus;
+    app
+}
+
+fn render_to_string(app: &App, width: u16) -> String {
+    let backend = TestBackend::new(width, 1);
+    let mut terminal = Terminal::new(backend).unwrap();
+    terminal
+        .draw(|f| kebab_tui::render_status_bar(f, Rect::new(0, 0, width, 1), app))
+        .unwrap();
+    let buffer = terminal.backend().buffer().clone();
+    (0..buffer.area.height)
+        .map(|y| {
+            (0..buffer.area.width)
+                .map(|x| buffer[(x, y)].symbol())
+                .collect::<String>()
+        })
+        .collect::<Vec<_>>()
+        .join("\n")
+}
+
+#[test]
+fn status_bar_shows_kebab_version_first() {
+    let app = fresh_app(Pane::Library);
+    let rendered = render_to_string(&app, 100);
+    let expected = format!("kebab v{}", env!("CARGO_PKG_VERSION"));
+    assert!(
+        rendered.contains(&expected),
+        "version not in status bar: rendered=\n{rendered}"
+    );
+}
+
+#[test]
+fn status_bar_shows_pane_label() {
+    for (focus, expected) in [
+        (Pane::Library, "Library"),
+        (Pane::Search, "Search"),
+        (Pane::Ask, "Ask"),
+        (Pane::Inspect, "Inspect"),
+        (Pane::Jobs, "Jobs"),
+    ] {
+        let app = fresh_app(focus);
+        let rendered = render_to_string(&app, 100);
+        assert!(
+            rendered.contains(expected),
+            "pane label '{expected}' not visible for focus={focus:?}: rendered=\n{rendered}"
+        );
+    }
+}
+
+#[test]
+fn status_bar_shows_doc_count() {
+    let app = fresh_app(Pane::Library);
+    let rendered = render_to_string(&app, 100);
+    assert!(
+        rendered.contains("0 docs"),
+        "doc count missing: rendered=\n{rendered}"
+    );
+}
+
+#[test]
+fn status_bar_idle_when_no_dynamic_state() {
+    let app = fresh_app(Pane::Library);
+    let rendered = render_to_string(&app, 100);
+    assert!(
+        rendered.contains("idle"),
+        "idle marker missing: rendered=\n{rendered}"
+    );
+}