fix: use homebrew node instead of nix read-only nodejs

- nodejs from nixpkgs is read-only, breaks pi-coding-agent internal npm install
- Use homebrew node (writable) for proper npm/pnpm global installs
- Remove pi-node hardcoded path hack from PATH

home/cli.nix

@@ -20,7 +20,7 @@
     micro
 
     # Node.js ecosystem
-    nodejs          # runtime for pi-coding-agent and other JS tools
+    # nodejs # read-only в nix store не подходит для pi (npm install ломается)
     pnpm            # fast node package manager
 
     # Secrets

home/default.nix

@@ -36,9 +36,9 @@
     "${config.home.homeDirectory}/bin"
     "${config.home.homeDirectory}/.local/bin"
     
-    # npm/pnpm global — установи pi через: pnpm i -g @mariozechner/pi-coding-agent
+    # npm/pnpm global
     "${config.home.homeDirectory}/.npm-global/bin"
-    "${config.home.homeDirectory}/.local/share/pnpm"
+    "${config.home.homeDirectory}/.local/share/pnpm/bin"
     
     # opencode (если установлен)
     "${config.home.homeDirectory}/.opencode/bin"

hosts/poppy/apps.nix

@@ -12,6 +12,7 @@
     brews = [
       "kew"
       "tea"           # Forgejo/Gitea CLI
+      "node"          # Node.js для pi-coding-agent (не из nix — read-only)
     ];
 
     casks = [