feat(tui): add help overlay shortcuts (F1/?) and update help UI and status messages

- Introduced a new “HELP & QUICK COMMANDS” section with bold header and shortcuts for toggling the help overlay and opening the files panel.
- Updated command help text to “Open the help overlay”.
- Extended onboarding and tutorial status lines to display the help shortcut.
- Modified help command handling to set the status to “Help” and clear errors.

crates/owlen-tui/src/chat_app.rs

@@ -57,10 +57,11 @@ use serde_json::{Value, json};
 
 const ONBOARDING_STATUS_LINE: &str =
     "Welcome to Owlen! Press F1 for help or type :tutorial for keybinding tips.";
-const ONBOARDING_SYSTEM_STATUS: &str = "Normal ▸ h/j/k/l • Insert ▸ i,a • Visual ▸ v • Command ▸ :";
+const ONBOARDING_SYSTEM_STATUS: &str =
+    "Normal ▸ h/j/k/l • Insert ▸ i,a • Visual ▸ v • Command ▸ : • Help ▸ F1/?";
 const TUTORIAL_STATUS: &str = "Tutorial loaded. Review quick tips in the footer.";
 const TUTORIAL_SYSTEM_STATUS: &str =
-    "Normal ▸ h/j/k/l • Insert ▸ i,a • Visual ▸ v • Command ▸ : • Send ▸ Enter";
+    "Normal ▸ h/j/k/l • Insert ▸ i,a • Visual ▸ v • Command ▸ : • Help ▸ F1/? • Send ▸ Enter";
 
 const FOCUS_CHORD_TIMEOUT: Duration = Duration::from_millis(1200);
 const RESIZE_DOUBLE_TAP_WINDOW: Duration = Duration::from_millis(450);
@@ -5575,6 +5576,8 @@ impl ChatApp {
                                 }
                                 "h" | "help" => {
                                     self.set_input_mode(InputMode::Help);
+                                    self.status = "Help".to_string();
+                                    self.error = None;
                                     self.command_palette.clear();
                                     return Ok(AppState::Running);
                                 }

crates/owlen-tui/src/commands/mod.rs

@@ -90,7 +90,7 @@ const COMMANDS: &[CommandSpec] = &[
     },
     CommandSpec {
         keyword: "help",
-        description: "Show help documentation",
+        description: "Open the help overlay",
     },
     CommandSpec {
         keyword: "h",

crates/owlen-tui/src/ui.rs

@@ -3061,6 +3061,14 @@ fn render_help(frame: &mut Frame<'_>, app: &ChatApp) {
             Line::from("  Ctrl+d/u      → scroll half page down/up"),
             Line::from("  Ctrl+f/b      → scroll full page down/up"),
             Line::from("  PageUp/Down   → scroll full page"),
+            Line::from(""),
+            Line::from(vec![Span::styled(
+                "HELP & QUICK COMMANDS",
+                Style::default().add_modifier(Modifier::BOLD).fg(theme.info),
+            )]),
+            Line::from("  F1 / ?        → toggle help overlay"),
+            Line::from("  :h, :help     → open help from command mode"),
+            Line::from("  :files, :explorer → toggle files panel"),
         ],
         1 => vec![
             // Editing
@@ -3171,6 +3179,8 @@ fn render_help(frame: &mut Frame<'_>, app: &ChatApp) {
                     .fg(theme.user_message_role),
             )]),
             Line::from("  :h, :help          → show this help"),
+            Line::from("  F1 or ?           → toggle help overlay"),
+            Line::from("  :files, :explorer → toggle files panel"),
             Line::from("  :quit              → quit application"),
             Line::from("  Ctrl+C twice       → quit application"),
             Line::from("  :reload            → reload configuration and themes"),