Fix: installa npm se assente, rimuove validate.yml

install-opencode/action.yml

@@ -10,7 +10,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Verifica prerequisiti
+    - name: Verifica prerequisiti e installa npm se assente
       shell: bash
       run: |
         set -euo pipefail
@@ -19,8 +19,16 @@ runs:
           exit 1
         fi
         if ! command -v npm &> /dev/null; then
-          echo "ERRORE: npm non trovato."
-          exit 1
+          echo "npm non trovato, tentativo di installazione..."
+          if command -v apt-get &> /dev/null; then
+            apt-get update -qq && apt-get install -y -qq npm 2>&1 || true
+          elif command -v apk &> /dev/null; then
+            apk add --no-cache npm 2>&1 || true
+          fi
+          if ! command -v npm &> /dev/null; then
+            echo "ERRORE: impossibile installare npm."
+            exit 1
+          fi
         fi
         echo "node $(node --version), npm $(npm --version)"