migrate: bash→fish, reorganize packages between system/home, add kwallet PAM auto-unlock, add python3+pip+pnpm

configuration.nix

@@ -60,6 +60,14 @@
   services.xserver.enable = true;
   services.displayManager.sddm.enable = true;
   services.desktopManager.plasma6.enable = true;
+  security.pam.services.login.kwallet = {
+    enable = true;
+    forceRun = true;
+  };
+  security.pam.services.sddm.kwallet = {
+    enable = true;
+    forceRun = true;
+  };
   services.xserver.xkb.layout = "us";
 
   # 字体
@@ -103,15 +111,15 @@
   users.users.test = {
     isNormalUser = true;
     description = "test";
+    shell = pkgs.fish;
     extraGroups = [ "networkmanager" "wheel" ];
     packages = with pkgs; [
-      kdePackages.kate
-      nodejs
       bubblewrap
     ];
   };
 
   # ── 程序与服务 ──────────────────────────────────────────────
+  programs.fish.enable = true;
   programs.firefox.enable = true;
   programs.steam.enable = true;
   programs.nix-ld.enable = true;
@@ -119,7 +127,13 @@
   services.gnome.gnome-keyring.enable = true;
 
   # ── 系统级软件包 ────────────────────────────────────────────
-  environment.systemPackages = with pkgs; [ ];
+  environment.systemPackages = with pkgs; [
+    rsync
+    wget
+    htop
+    btop
+    (python3.withPackages (ps: with ps; [ pip ]))
+  ];
 
   # ── 系统状态版本（请勿修改） ────────────────────────────────
   system.stateVersion = "25.11";