Fix: boundary fix in help/dict views

src/views/dict_view.rs

@@ -160,6 +160,7 @@ fn render_words(frame: &mut Frame, app: &App, area: Rect, is_searching: bool) {
     let visible_height = content_area.height.saturating_sub(2) as usize;
     let total_lines = lines.len();
     let max_scroll = total_lines.saturating_sub(visible_height);
+    app.ui.dict_max_scroll.set(max_scroll);
     let scroll = app.ui.dict_scroll().min(max_scroll);
 
     let title = if is_searching {

src/views/help_view.rs

@@ -223,6 +223,7 @@ fn render_content(frame: &mut Frame, app: &App, area: Rect) {
         .map(|l| wrapped_line_count(l, content_width))
         .sum();
     let max_scroll = total_wrapped.saturating_sub(visible_height);
+    app.ui.help_max_scroll.set(max_scroll);
     let scroll = app.ui.help_scroll().min(max_scroll);
 
     let mut lines = parsed.lines.clone();