feat(gui): add service and remote mode support (#1578)

This PR fundamentally restructures the EasyTier GUI, introducing support for service mode and remote mode, transforming it from a simple desktop application into a powerful network management terminal. This change allows users to persistently run the EasyTier core as a background service or remotely manage multiple EasyTier instances, greatly improving deployment flexibility and manageability.

flake.nix

@@ -32,6 +32,11 @@
         rustVersion = "1.89.0";
         makeRust =
           features:
+          let
+            rustTarget = pkgs.stdenv.hostPlatform.config;
+            muslTarget = pkgs.lib.replaceStrings [ "gnu" ] [ "musl" ] rustTarget;
+            muslTargets = if pkgs.stdenv.isLinux then [ muslTarget ] else [ ];
+          in
           pkgs.rust-bin.stable.${rustVersion}.default.override {
             extensions = [
               "rust-src"
@@ -39,7 +44,7 @@
             ]
             ++ (if builtins.elem "android" features then android.rust.extensions else [ ]);
 
-            targets = if builtins.elem "android" features then android.rust.targets else [ ];
+            targets = muslTargets ++ (if builtins.elem "android" features then android.rust.targets else []);
           };
 
         android = import ./android.nix {
@@ -76,6 +81,7 @@
               );
 
             buildInputs = with pkgs; ([
+              jemalloc
               zstd
               openssl
               libclang
@@ -90,6 +96,7 @@
             LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (flattenPaths (buildInputs ++ nativeBuildInputs));
             ZSTD_SYS_USE_PKG_CONFIG = true;
             KCP_SYS_EXTRA_HEADER_PATH = "${pkgs.libclang.lib}/lib/clang/19/include:${pkgs.glibc.dev}/include";
+            JEMALLOC_OVERRIDE = "${pkgs.jemalloc}/lib/libjemalloc.so";
           }
           // (if hasFeature "android" then android.envVars else { }));
       in