Show the uninstall button whenever there is something to uninstall

wavexlr/app.py

@@ -284,7 +284,6 @@ def _update_service_status(self):
             self.audio_status_icon.set_from_icon_name("emblem-ok-symbolic")
             self.audio_status_icon.remove_css_class("dim-label")
             self.audio_status_row.set_subtitle("Audio service running")
-            self.uninstall_btn.set_visible(True)
         else:
             self.audio_status_icon.set_from_icon_name("dialog-warning-symbolic")
             # Distinguish a service that never came up from one that is not
@@ -297,12 +296,19 @@ def _update_service_status(self):
             else:
                 subtitle = "Audio service not running"
             self.audio_status_row.set_subtitle(subtitle)
-            self.uninstall_btn.set_visible(False)
+
+        # Shown whenever there is something to remove, rather than only while
+        # the service runs. A stopped or failed service is when removing it
+        # matters most, and the udev rule and the config drop-ins outlive it
+        # either way.
+        self.uninstall_btn.set_visible(setup.anything_installed())
 
     def _on_uninstall_clicked(self, btn):
         dialog = Adw.AlertDialog(
             heading="Uninstall Capture Fix?",
-            body="This will remove the audio service and USB permissions.\n\nYou can reinstall them by restarting OpenWave.",
+            body="This will remove the audio service, the WirePlumber rule, "
+                 "the mix sinks and the USB permissions.\n\nYou can reinstall "
+                 "them by restarting OpenWave.",
         )
         dialog.add_response("cancel", "Cancel")
         dialog.add_response("uninstall", "Uninstall")

wavexlr/setup.py

@@ -87,6 +87,20 @@ def needs_setup():
     )
 
 
+def anything_installed():
+    """Whether any part of the integration is still on disk.
+
+    Not the inverse of needs_setup(): a partial install both needs setup and
+    has things left to remove.
+    """
+    return (
+        udev_installed()
+        or service_installed()
+        or wireplumber_installed()
+        or mixes_installed()
+    )
+
+
 def install_udev():
     """Install udev rules via pkexec."""
     rules = "\n".join(UDEV_RULES)