refactor: flatten module files from subdirectories into single files

src/ui/view.rs

@@ -0,0 +1,48 @@
+mod action_menu;
+mod cred_form;
+mod cred_list;
+mod form;
+mod home_list;
+mod import;
+mod settings;
+
+use crate::app::App;
+use anyhow::Result;
+use crossterm::event::KeyEvent;
+use ratatui::{
+    Frame,
+    layout::Rect,
+    widgets::Row,
+};
+
+/// A View represents a full screen that handles both rendering and key events.
+pub trait View {
+    fn draw(&self, frame: &mut Frame<'_>, app: &App, area: Rect);
+    fn handle_key(&self, app: &mut App, key: KeyEvent) -> Result<()>;
+}
+
+pub use action_menu::ActionMenuView;
+pub use cred_form::CredFormView;
+pub use cred_list::CredListView;
+pub use form::FormView;
+pub use home_list::{DeleteConfirmView, HomeListView, QuickSelectView, SearchView};
+pub use import::ImportView;
+pub use settings::SettingsView;
+
+/// Scroll a 1:1 row list so the selected index stays visible.
+/// `area_height` includes the block borders and table header.
+pub fn scroll_rows<'a>(rows: Vec<Row<'a>>, selected: usize, area_height: u16) -> Vec<Row<'a>> {
+    let visible = area_height.saturating_sub(3) as usize; // 2 borders + 1 header
+    let total = rows.len();
+    if visible == 0 || total <= visible {
+        return rows;
+    }
+    let scroll = if selected < visible / 2 {
+        0
+    } else if selected + visible / 2 >= total {
+        total.saturating_sub(visible)
+    } else {
+        selected - visible / 2
+    };
+    rows.into_iter().skip(scroll).take(visible).collect()
+}