system dep pre-check

scripts/install.sh

@@ -56,6 +56,7 @@ for module in "${modules[@]}"; do
 done
 
 detect_os_arch
+check_deps
 log "Detected OS: $OS"
 log "Detected ARCH: $ARCH"
 

scripts/utils.sh

@@ -26,4 +26,13 @@ detect_os_arch() {
   else
     SYSTEMCTL_AVAILABLE=false
   fi
+}
+
+check_deps() {
+  for cmd in wget grep stat tar sha256sum; do
+    if ! command -v $cmd &> /dev/null; then
+      log "Missing system dependency: $cmd. Install $cmd via your package manager and retry."
+      exit 1
+    fi
+  done
 }