fix(network): align applet with cosmic-settings 1.3 nmrs backend

cosmic-settings 1.3 replaced its custom NetworkManager backend with nmrs
and removed subscriptions/network-manager, which cosmic-applet-network
still referenced by path. That broke manifest resolution for the whole
workspace, so no applet package could be built at all.

Take upstream's post-migration cosmic-applet-network wholesale (upstream
e318f0d4 "migrate NetworkManager flow to nmrs 3.4" plus the nine network
fixes that followed it). None of our local commits touched this crate's
sources, only its manifest, so the only local adjustments to reapply are
the libcosmic -> cosmic workspace alias and the 1.3.0 version.

This also drops the cosmic-dbus-networkmanager dependency, and with it
the last user of the now-dead cosmic-settings-network-manager and
cosmic-settings-sound patch entries, which are removed from the
workspace manifest.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

cosmic-applet-network/Cargo.toml

@@ -5,9 +5,7 @@ edition = "2024"
 license = "GPL-3.0-or-later"
 
 [dependencies]
-anyhow.workspace = true
 async-fn-stream = "0.3"
-cosmic-dbus-networkmanager = { path = "../../dbus-settings-bindings/networkmanager" }
 futures.workspace = true
 futures-util.workspace = true
 i18n-embed-fl.workspace = true
@@ -25,13 +23,7 @@ tokio.workspace = true
 tracing-log.workspace = true
 tracing-subscriber.workspace = true
 tracing.workspace = true
-zbus.workspace = true
 indexmap = "2.13.0"
 secure-string = "0.3.0"
 uuid = { version = "1.21.0", features = ["v4"] }
-nmrs = "3.1.3"
-
-
-
-[dependencies.cosmic-settings-network-manager-subscription]
-path = "../../cosmic-settings/subscriptions/network-manager"
+nmrs = "3.4.0"

cosmic-applet-network/src/lib.rs

@@ -3,7 +3,6 @@
 mod app;
 mod config;
 mod localize;
-mod utils;
 
 use crate::localize::localize;
 

cosmic-applet-network/src/utils.rs

@@ -1,18 +0,0 @@
-use futures_util::future::select;
-
-/// Spawn a background tasks and forward its messages
-pub fn forward_event_loop<M: 'static + Send, T: Future<Output = ()> + Send + 'static>(
-    event_loop: impl FnOnce(async_fn_stream::StreamEmitter<M>) -> T + Send + 'static,
-) -> (tokio::sync::oneshot::Sender<()>, cosmic::Task<M>) {
-    let (cancel_tx, cancel_rx) = tokio::sync::oneshot::channel::<()>();
-
-    let task = cosmic::Task::stream(async_fn_stream::fn_stream(|emitter| async move {
-        select(
-            std::pin::pin!(cancel_rx),
-            std::pin::pin!(event_loop(emitter)),
-        )
-        .await;
-    }));
-
-    (cancel_tx, task)
-}