fix(battery): restore defaults if unsetting charge limits

cosmic-applet-battery/src/app.rs

@@ -4,7 +4,7 @@
 use crate::{
     backend::{
         Power, PowerProfileRequest, PowerProfileUpdate, get_charging_limit,
-        power_profile_subscription, set_charging_limit,
+        power_profile_subscription, set_charging_limit, unset_charging_limit,
     },
     config,
     dgpu::{Entry, GpuUpdate, dgpu_subscription},
@@ -310,6 +310,10 @@ impl cosmic::Application for CosmicBatteryApplet {
                     return cosmic::iced::Task::perform(set_charging_limit(), |_| {
                         cosmic::Action::None
                     });
+                } else {
+                    return cosmic::iced::Task::perform(unset_charging_limit(), |_| {
+                        cosmic::Action::None
+                    });
                 }
             }
             Message::Errored(why) => {

cosmic-applet-battery/src/backend/mod.rs

@@ -250,3 +250,22 @@ pub async fn set_charging_limit() -> Result<()> {
     }
     Ok(())
 }
+
+// unset battery charging thresholds via s76 power_daemon
+pub async fn unset_charging_limit() -> Result<()> {
+    if let Ok(conn) = Connection::system().await {
+        if let Ok(backend) = get_power_backend(&conn, &BackendType::S76PowerDaemon).await {
+            match backend {
+                Backend::S76PowerDaemon(proxy) => {
+                    let _ = proxy.set_charge_thresholds(&(90, 100)).await;
+                }
+                Backend::PowerProfilesDaemon(_) => {
+                    tracing::info!(
+                        "Unsetting charging limit via Power Profiles Daemon is not supported."
+                    );
+                }
+            }
+        }
+    }
+    Ok(())
+}