fix: discover panel Java runtimes in one-click installer

deploy/install.sh

@@ -233,14 +233,8 @@ java_arch_matches_host() {
   esac
 }
 
-system_java_home() {
-  local java_bin resolved_java java_major home
-  if [ -n "${KAIDI_JAVA_HOME:-}" ]; then
-    home=${KAIDI_JAVA_HOME%/}
-    java_bin="$home/bin/java"
-  else
-    java_bin=$(command -v java 2>/dev/null || true)
-  fi
+java_home_from_bin() {
+  local java_bin=$1 resolved_java java_major home
   [ -x "$java_bin" ] || return 1
   java_major=$(
     "$java_bin" -version 2>&1 \
@@ -258,6 +252,34 @@ system_java_home() {
   printf '%s\n' "$home"
 }
 
+system_java_home() {
+  local candidate home
+  if [ -n "${KAIDI_JAVA_HOME:-}" ]; then
+    candidate="${KAIDI_JAVA_HOME%/}/bin/java"
+    java_home_from_bin "$candidate" && return 0
+    return 1
+  fi
+  candidate=$(command -v java 2>/dev/null || true)
+  if [ -n "$candidate" ] && home=$(java_home_from_bin "$candidate"); then
+    printf '%s\n' "$home"
+    return 0
+  fi
+  # Baota commonly keeps JDKs outside PATH. Prefer an existing Java 17 there
+  # before consulting the remote Azul metadata endpoint.
+  for candidate in \
+    /www/server/java/*/bin/java \
+    /www/server/java/*/jre/bin/java \
+    /usr/lib/jvm/*/bin/java \
+    /usr/java/*/bin/java; do
+    [ -x "$candidate" ] || continue
+    if home=$(java_home_from_bin "$candidate"); then
+      printf '%s\n' "$home"
+      return 0
+    fi
+  done
+  return 1
+}
+
 prepare_java() {
   local api java_metadata package_metadata package_uuid java_url java_sha256 actual_sha256 system_home java_line
   if system_home=$(system_java_home); then