Implement TUI colon command mode

apps/tui/src/action.rs

@@ -154,6 +154,7 @@ impl ActionSpec {
 const BROWSER_LIKE: &[Mode] = &[Mode::Browser, Mode::Viewer];
 const ENTRY_CONTEXT: &[Mode] = &[Mode::Browser, Mode::Viewer];
 const UNLOCKED: &[Mode] = &[Mode::Browser, Mode::Viewer, Mode::Editor];
+const COMMANDABLE: &[Mode] = &[Mode::Browser, Mode::Viewer, Mode::Editor, Mode::Locked];
 const QUITTABLE: &[Mode] = &[Mode::Browser, Mode::Viewer, Mode::Locked];
 const LOCKABLE: &[Mode] = &[
     Mode::Browser,
@@ -224,7 +225,7 @@ pub static ACTIONS: &[ActionSpec] = &[
         label: "command",
         command: "command",
         bindings: keys!((KeyCode::Char(':'), KeyModifiers::NONE, ":")),
-        modes: UNLOCKED,
+        modes: COMMANDABLE,
     },
     ActionSpec {
         action: Action::Cancel,