feat: first take at M2

crates/bds-ui/src/views/tab_bar.rs

@@ -0,0 +1,58 @@
+use iced::widget::{button, container, row, text, Space};
+use iced::{Element, Length};
+
+use crate::app::Message;
+use crate::state::tabs::Tab;
+
+pub fn view(
+    tabs: &[Tab],
+    active_tab: Option<&str>,
+) -> Element<'static, Message> {
+    if tabs.is_empty() {
+        return Space::with_height(0).into();
+    }
+
+    let tab_buttons: Vec<Element<'static, Message>> = tabs
+        .iter()
+        .map(|tab| {
+            let is_active = active_tab == Some(tab.id.as_str());
+            let title_text = if tab.is_transient {
+                format!("{} (preview)", tab.title)
+            } else {
+                tab.title.clone()
+            };
+            let tab_id = tab.id.clone();
+            let close_id = tab.id.clone();
+
+            let label = row![
+                text(title_text).size(12),
+                button(text("×").size(12))
+                    .on_press(Message::CloseTab(close_id))
+                    .padding(2)
+                    .style(button::text),
+            ]
+            .spacing(4);
+
+            let mut btn = button(label)
+                .on_press(Message::SelectTab(tab_id))
+                .padding([4, 8]);
+
+            if is_active {
+                btn = btn.style(button::primary);
+            } else {
+                btn = btn.style(button::secondary);
+            }
+
+            btn.into()
+        })
+        .collect();
+
+    container(
+        iced::widget::Row::with_children(tab_buttons)
+            .spacing(1)
+            .height(Length::Fixed(35.0)),
+    )
+    .width(Length::Fill)
+    .height(Length::Fixed(35.0))
+    .into()
+}