Add animated spinner to OperationLog using Rich Spinner

Uses rich.spinner.Spinner with set_interval refresh instead of
Textual's LoadingIndicator which caused rendering failures.
Spinner shows dots animation while running, changes to checkmark on finish.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tui/gniza.tcss

@@ -193,10 +193,21 @@ SelectionList {
     border: thick $accent;
 }
 
+#ol-header {
+    height: auto;
+    margin: 0 0 1 0;
+}
+
 #ol-title {
     text-style: bold;
     color: #00cc00;
-    margin: 0 0 1 0;
+    width: 1fr;
+}
+
+#ol-spinner {
+    width: auto;
+    min-width: 3;
+    height: 1;
 }
 
 #ol-log {

tui/screens/backup.py

@@ -77,6 +77,7 @@ class BackupScreen(Screen):
             log_screen.write("\n[green]Backup completed successfully.[/green]")
         else:
             log_screen.write(f"\n[red]Backup failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     @work
     async def _do_backup_all(self) -> None:
@@ -87,6 +88,7 @@ class BackupScreen(Screen):
             log_screen.write("\n[green]All backups completed.[/green]")
         else:
             log_screen.write(f"\n[red]Backup failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     def action_go_back(self) -> None:
         self.app.pop_screen()

tui/screens/remotes.py

@@ -94,6 +94,7 @@ class RemotesScreen(Screen):
             log_screen.write("\n[green]Connection test passed.[/green]")
         else:
             log_screen.write(f"\n[red]Connection test failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     def _delete_remote(self, name: str) -> None:
         conf = CONFIG_DIR / "remotes.d" / f"{name}.conf"

tui/screens/restore.py

@@ -122,6 +122,7 @@ class RestoreScreen(Screen):
             log_screen.write("\n[green]Restore completed successfully.[/green]")
         else:
             log_screen.write(f"\n[red]Restore failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     def action_go_back(self) -> None:
         self.app.pop_screen()

tui/screens/retention.py

@@ -75,6 +75,7 @@ class RetentionScreen(Screen):
             log_screen.write("\n[green]Cleanup completed.[/green]")
         else:
             log_screen.write(f"\n[red]Cleanup failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     @work
     async def _do_cleanup_all(self) -> None:
@@ -85,6 +86,7 @@ class RetentionScreen(Screen):
             log_screen.write("\n[green]All cleanups completed.[/green]")
         else:
             log_screen.write(f"\n[red]Cleanup failed (exit code {rc}).[/red]")
+        log_screen.finish()
 
     def action_go_back(self) -> None:
         self.app.pop_screen()

tui/widgets/operation_log.py

@@ -1,10 +1,32 @@
 import asyncio
 
+from rich.spinner import Spinner as RichSpinner
 from rich.text import Text
 from textual.app import ComposeResult
 from textual.screen import ModalScreen
 from textual.widgets import RichLog, Button, Static
-from textual.containers import Vertical
+from textual.containers import Vertical, Horizontal
+from textual.timer import Timer
+
+
+class SpinnerWidget(Static):
+    """Animated spinner using Rich's Spinner renderable."""
+
+    def __init__(self, style: str = "dots", **kwargs):
+        super().__init__("", **kwargs)
+        self._spinner = RichSpinner(style)
+        self._timer: Timer | None = None
+
+    def on_mount(self) -> None:
+        self._timer = self.set_interval(1 / 12, self._tick)
+
+    def _tick(self) -> None:
+        self.update(self._spinner)
+
+    def stop(self) -> None:
+        if self._timer:
+            self._timer.stop()
+        self.update("✅")
 
 
 class OperationLog(ModalScreen[None]):
@@ -19,7 +41,9 @@ class OperationLog(ModalScreen[None]):
 
     def compose(self) -> ComposeResult:
         with Vertical(id="op-log"):
-            yield Static(self._title, id="ol-title")
+            with Horizontal(id="ol-header"):
+                yield Static(self._title, id="ol-title")
+                yield SpinnerWidget(id="ol-spinner")
             yield RichLog(id="ol-log", wrap=True, highlight=True, markup=True)
             yield Button("Close", variant="primary", id="ol-close")
 
@@ -43,6 +67,12 @@ class OperationLog(ModalScreen[None]):
         else:
             log.write(text)
 
+    def finish(self) -> None:
+        try:
+            self.query_one("#ol-spinner", SpinnerWidget).stop()
+        except Exception:
+            pass
+
     def write(self, text: str) -> None:
         if not self._mounted_event.is_set():
             self._buffer.append(text)