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

home.nix

@@ -13,11 +13,22 @@
     google-chrome
     neovim
     telegram-desktop
-    htop
-    btop
     wechat
     gpu-screen-recorder
     gpu-screen-recorder-gtk
+    android-tools
+    openjdk21
+    cloudflared
+    obsidian
+    zed-editor
+    postgresql
+    rclone
+    feishu
+    wpsoffice-cn
+    flutter
+    nodejs
+    pnpm
+    kdePackages.kate
   ];
 
   # 用 Home Manager 固定 Fcitx5 输入法配置，仅保留拼音
@@ -46,10 +57,10 @@
   # 让 nix-shell 等传统命令也能安装 unfree 软件
   xdg.configFile."nixpkgs/config.nix".text = "{ allowUnfree = true; }";
 
-  programs.bash = {
+  programs.fish = {
     enable = true;
-    initExtra = ''
-      export PATH="$HOME/.npm-global/bin:$PATH"
+    interactiveShellInit = ''
+      fish_add_path "$HOME/.npm-global/bin"
     '';
   };