style: apply ruff auto-fixes

SYS/rich_display.py

@@ -11,7 +11,7 @@ from __future__ import annotations
 
 import contextlib
 import sys
-from typing import Any, Iterator, Sequence, TextIO
+from typing import Any, Iterator, TextIO
 
 from rich.console import Console
 from rich.panel import Panel
@@ -81,7 +81,6 @@ def show_provider_config_panel(
 ) -> None:
     """Show a Rich panel explaining how to configure providers."""
     from rich.table import Table as RichTable
-    from rich.text import Text
     from rich.console import Group
 
     if isinstance(provider_names, str):
@@ -117,7 +116,6 @@ def show_store_config_panel(
 ) -> None:
     """Show a Rich panel explaining how to configure storage backends."""
     from rich.table import Table as RichTable
-    from rich.text import Text
     from rich.console import Group
 
     if isinstance(store_names, str):
@@ -152,7 +150,6 @@ def show_available_providers_panel(provider_names: List[str]) -> None:
     """Show a Rich panel listing available/configured providers."""
     from rich.columns import Columns
     from rich.console import Group
-    from rich.text import Text
 
     if not provider_names:
         return