Feature 1: date buttons in EditTask popup

- Add 3 buttons (Today, Tomorrow, Next Week) below Notes
- Popup height increased from 10 to 12
- Tab/Up/Down cycle through 5 fields (Title, Notes, 3 buttons)
- Enter on a date button saves task and sets due date
- Text editing keys restricted to fields 0 and 1

src/ui/components.rs

@@ -266,9 +266,8 @@ pub fn render_edit_task_popup(
     notes_cursor: usize,
     active_field: usize,
 ) {
-    let popup_area = centered_rect(75, 10, area);
+    let popup_area = centered_rect(75, 12, area);
 
-    // Clear the area first to prevent style/symbol bleed from previously rendered widgets
     frame.render_widget(Clear, popup_area);
 
     let outer_block = Block::default()
@@ -280,7 +279,6 @@ pub fn render_edit_task_popup(
     frame.render_widget(Clear, popup_area);
     frame.render_widget(outer_block, popup_area);
 
-    // Split inner area into rows
     let rows = Layout::default()
         .direction(Direction::Vertical)
         .constraints([
@@ -288,6 +286,8 @@ pub fn render_edit_task_popup(
             Constraint::Length(1),
             Constraint::Length(3),
             Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
         ])
         .split(inner_area);
 
@@ -321,19 +321,45 @@ pub fn render_edit_task_popup(
         .block(notes_block);
     frame.render_widget(notes_para, rows[2]);
 
+    // ── Date buttons row ──
+    let today_style = if active_field == 2 {
+        Style::default().fg(FOCUS_COLOR).add_modifier(Modifier::BOLD)
+    } else {
+        Style::default().fg(Color::DarkGray)
+    };
+    let tomorrow_style = if active_field == 3 {
+        Style::default().fg(FOCUS_COLOR).add_modifier(Modifier::BOLD)
+    } else {
+        Style::default().fg(Color::DarkGray)
+    };
+    let next_week_style = if active_field == 4 {
+        Style::default().fg(FOCUS_COLOR).add_modifier(Modifier::BOLD)
+    } else {
+        Style::default().fg(Color::DarkGray)
+    };
+    let buttons = Paragraph::new(Line::from(vec![
+        Span::styled(" [ Today ] ", today_style),
+        Span::raw("   "),
+        Span::styled(" [ Tomorrow ] ", tomorrow_style),
+        Span::raw("   "),
+        Span::styled(" [ Next Week ] ", next_week_style),
+    ]))
+    .alignment(Alignment::Center);
+    frame.render_widget(buttons, rows[4]);
+
     // ── Hint row ──
     let hint = Paragraph::new(Line::from(Span::styled(
         " Tab:switch field  Enter:save  Esc:cancel ",
         Style::default().fg(Color::Gray),
     )))
     .alignment(Alignment::Center);
-    frame.render_widget(hint, rows[3]);
+    frame.render_widget(hint, rows[5]);
 
     // ── Cursor ──
-    let (cursor_x, cursor_y) = if active_field == 0 {
-        (rows[0].x + 1 + title_cursor as u16, rows[0].y + 1)
-    } else {
-        (rows[2].x + 1 + notes_cursor as u16, rows[2].y + 1)
+    let (cursor_x, cursor_y) = match active_field {
+        0 => (rows[0].x + 1 + title_cursor as u16, rows[0].y + 1),
+        1 => (rows[2].x + 1 + notes_cursor as u16, rows[2].y + 1),
+        _ => return,
     };
     frame.set_cursor_position(ratatui::layout::Position::new(cursor_x, cursor_y));
 }