Write some amount of documentation

src/state/ui.rs

@@ -19,12 +19,20 @@ pub enum DictFocus {
     Words,
 }
 
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+pub enum HelpFocus {
+    #[default]
+    Topics,
+    Content,
+}
+
 pub struct UiState {
     pub sparkles: Sparkles,
     pub status_message: Option<String>,
     pub flash_until: Option<Instant>,
     pub flash_kind: FlashKind,
     pub modal: Modal,
+    pub help_focus: HelpFocus,
     pub help_topic: usize,
     pub help_scrolls: Vec<usize>,
     pub help_search_active: bool,
@@ -52,6 +60,7 @@ impl Default for UiState {
             flash_until: None,
             flash_kind: FlashKind::Success,
             modal: Modal::None,
+            help_focus: HelpFocus::default(),
             help_topic: 0,
             help_scrolls: vec![0; crate::views::help_view::topic_count()],
             help_search_active: false,