refactor: use ui.py and remove unused imports

auditui/app.py

@@ -6,9 +6,7 @@ from typing import TYPE_CHECKING
 
 from textual import work
 from textual.app import App, ComposeResult
-from textual.containers import Container, Horizontal, ScrollableContainer
 from textual.events import Key
-from textual.screen import ModalScreen
 from textual.widgets import DataTable, Footer, Header, ProgressBar, Static
 from textual.worker import get_current_worker
 
@@ -22,38 +20,12 @@ from .table_utils import (
     filter_unfinished_items,
     format_item_as_row,
 )
+from .ui import HelpScreen
 
 if TYPE_CHECKING:
     from textual.widgets._data_table import ColumnKey
 
 
-class HelpScreen(ModalScreen):
-    """Help screen displaying all available keybindings."""
-
-    BINDINGS = [("escape", "dismiss", "Close"), ("?", "dismiss", "Close")]
-
-    def compose(self) -> ComposeResult:
-        with Container(id="help_container"):
-            yield Static("Key Bindings", id="help_title")
-            with ScrollableContainer(id="help_content"):
-                bindings = self.app.BINDINGS
-                for binding in bindings:
-                    if isinstance(binding, tuple):
-                        key, action, description = binding
-                    else:
-                        key = binding.key
-                        description = binding.description
-                    key_display = key.replace(
-                        "ctrl+", "^").replace("left", "←").replace("right", "→").replace("space", "Space").replace("enter", "Enter")
-                    with Horizontal(classes="help_row"):
-                        yield Static(f"[bold #f9e2af]{key_display}[/]", classes="help_key")
-                        yield Static(description, classes="help_action")
-            yield Static("Press [bold #f9e2af]?[/] or [bold #f9e2af]Escape[/] to close", id="help_footer")
-
-    def action_dismiss(self) -> None:
-        self.dismiss()
-
-
 class Auditui(App):
     """Main application class for the Audible TUI app."""