zinit(init): remote flist fallback from zos.grid.tf when local manifests are missing

firmware.sh: if no local firmware-latest.fl, fetch https://zos.grid.tf/store/flists/firmware-latest.fl using wget or busybox wget; then mount via rfs. modules.sh: if no local modules-6.16.5-arch1-1.fl, fetch https://zos.grid.tf/store/flists/modules-6.16.5-arch1-1-Zero-OS.fl using wget or busybox wget; then mount via rfs. Keep env overrides MODULES_FLIST/FIRMWARE_FLIST and RFS_BIN semantics.

config/zinit/init/firmware.sh

@@ -8,6 +8,7 @@ log() { echo "[rfs-firmware] $*"; }
 
 RFS_BIN="${RFS_BIN:-rfs}"
 TARGET="/usr/lib/firmware"
+BASE_URL="${FLISTS_BASE_URL:-https://zos.grid.tf/store/flists}"
 
 # Allow override via env
 if [ -n "${FIRMWARE_FLIST:-}" ] && [ -f "${FIRMWARE_FLIST}" ]; then
@@ -28,8 +29,24 @@ else
 fi
 
 if [ -z "${FL:-}" ]; then
-  log "firmware-latest.fl not found in known paths; skipping mount"
-  exit 0
+  # Try remote fetch as a fallback
+  mkdir -p /etc/rfs
+  FL="/etc/rfs/firmware-latest.fl"
+  URL="${BASE_URL}/firmware-latest.fl"
+  log "firmware-latest.fl not found locally; fetching ${URL}"
+
+  if command -v wget >/dev/null 2>&1; then
+    wget -q -O "${FL}" "${URL}" || true
+  elif command -v busybox >/dev/null 2>&1; then
+    busybox wget -q -O "${FL}" "${URL}" || true
+  else
+    log "no wget available to fetch ${URL}"
+  fi
+
+  if [ ! -s "${FL}" ]; then
+    log "failed to fetch ${URL}; skipping mount"
+    exit 0
+  fi
 fi
 
 # Ensure target directory exists