Refresh login screen with server list UI and refactor platform config

Redesign login view with server card list, add/edit/delete modals,
and per-server ping status display. Rename ProxyOverrides to ClientConfig,
remove ConfigSystemInterface in favor of direct platform methods
(load_config, load_username, set_default_username, load_server_url),
remove SharedState threading in favor of global STATE, simplify
network_loop and audio setup, update proxy endpoint from /overrides
to /config, and clean up desktop launch configuration.

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

proxy/src/main.rs

@@ -1,5 +1,5 @@
 use color_eyre::eyre::{anyhow, bail, Context, Result};
-use mumble_web2_common::{ProxyOverrides, ServerStatus};
+use mumble_web2_common::{ClientConfig, ServerStatus};
 use rand::Rng;
 use salvo::conn::rustls::{Keycert, RustlsConfig};
 use salvo::cors::{AllowOrigin, Cors};
@@ -16,7 +16,7 @@ use tokio::net::TcpStream;
 use tokio::pin;
 use tokio_rustls::rustls::client::danger::{HandshakeSignatureValid, ServerCertVerifier};
 use tokio_rustls::rustls::pki_types::{CertificateDer, ServerName, UnixTime};
-use tokio_rustls::rustls::{ClientConfig, DigitallySignedStruct};
+use tokio_rustls::rustls::{ClientConfig as RlsClientConfig, DigitallySignedStruct};
 use tokio_rustls::{rustls, TlsConnector};
 use tracing::info;
 use tracing::info_span;
@@ -77,7 +77,7 @@ async fn main() -> Result<()> {
         .install_default()
         .map_err(|e| anyhow!("could not install crypto provider {e:?}"))?;
 
-    let mut overrides = ProxyOverrides {
+    let mut client_config = ClientConfig {
         proxy_url: match &server_config.proxy_url {
             Some(url) => Some(url.to_string()),
             None => None,
@@ -102,7 +102,7 @@ async fn main() -> Result<()> {
             let cert = cert_params.self_signed(&key_pair)?;
 
             let hash = hmac_sha256::Hash::hash(cert.der().as_ref());
-            overrides.cert_hash = Some(hash.into());
+            client_config.cert_hash = Some(hash.into());
 
             (cert.pem().into(), key_pair.serialize_pem().into())
         }
@@ -122,11 +122,14 @@ async fn main() -> Result<()> {
     };
     let rustls_config = RustlsConfig::new(Keycert::new().cert(cert.as_slice()).key(key.as_slice()));
 
-    info!("proxy overrides:\n{}", toml::to_string_pretty(&overrides)?);
+    info!(
+        "client config:\n{}",
+        toml::to_string_pretty(&client_config)?
+    );
 
     let config_craft = ConfigCraft {
         server_config: server_config.clone(),
-        overrides,
+        client_config,
     };
 
     let status_craft = StatusCraft {
@@ -136,7 +139,7 @@ async fn main() -> Result<()> {
     // Server routing
     let mut router = Router::new()
         .push(Router::with_path("/proxy").goal(config_craft.connect_proxy()))
-        .push(Router::with_path("/overrides").get(config_craft.get_overrides()))
+        .push(Router::with_path("/config").get(config_craft.get_config()))
         .push(Router::with_path("/status").get(status_craft.get_status()))
         .hoop(Logger::new());
     if let Some(gui_path) = server_config.gui_path.clone() {
@@ -249,14 +252,14 @@ impl StatusCraft {
 #[derive(Clone)]
 pub struct ConfigCraft {
     server_config: Arc<Config>,
-    overrides: ProxyOverrides,
+    client_config: ClientConfig,
 }
 
 #[craft]
 impl ConfigCraft {
     #[craft(handler)]
-    async fn get_overrides(&self) -> Json<ProxyOverrides> {
-        Json(self.overrides.clone())
+    async fn get_config(&self) -> Json<ClientConfig> {
+        Json(self.client_config.clone())
     }
 
     #[craft(handler)]
@@ -317,7 +320,7 @@ async fn connect_proxy_impl(
 ) -> Result<()> {
     info!("connecting to Mumble server...");
 
-    let config = ClientConfig::builder()
+    let config = RlsClientConfig::builder()
         .dangerous()
         .with_custom_certificate_verifier(Arc::new(NoCertificateVerification))
         .with_no_client_auth();