v1.28: Fix LAN-only device configuration and add informative messages

CRITICAL FIX:
- Added load_config() call in add_device_menu to read saved ENABLE_TLS setting
- Device display now correctly shows UDP/5060 when ENABLE_TLS != "y"
- Device display shows TLS/5061 only when ENABLE_TLS == "y"
- SRTP requirement properly displayed based on TLS configuration

OTHER FIXES:
- ICE support only enabled when DOMAIN_NAME is set (FQDN/internet calling)
- RTP config: icesupport and STUN only for FQDN setups, not LAN-only
- Added informative message after server install before internet setup prompt

ISSUE RESOLVED:
When installing server-only without selecting internet/certs, devices now
correctly show:
  Transport: UDP (port 5060)
  SRTP: Not required

This matches the actual pjsip.conf configuration and allows mobile devices
to properly register with UDP transport on LAN networks.

Created v1.28.sh with all fixes, keeping v1.23.sh for reference.

easy-asterisk-interactive-v1.23.sh

@@ -559,6 +559,7 @@ manage_rooms() {
 
 add_device_menu() {
     print_header "Add Device"
+    load_config  # Load saved configuration to check ENABLE_TLS, DOMAIN_NAME, etc.
     list_categories
     read -p "Category number: " cat_num
     local cat_data=$(get_category_by_index "$cat_num")
@@ -2005,11 +2006,18 @@ install_full() {
     enable_client_services
     open_firewall_ports
     save_config
-    
+
+    echo ""
+    echo "════════════════════════════════════════════════════════"
+    print_success "Local network install complete"
+    echo ""
+    echo "Server and devices are reachable over internal LAN network only."
+    echo "To add internet calling capability, continue with the setup below."
+    echo "════════════════════════════════════════════════════════"
     echo ""
     read -p "Run Internet/Certificate Setup wizard now? [Y/n]: " run_setup
     [[ ! "$run_setup" =~ ^[Nn]$ ]] && setup_internet_access
-    
+
     print_success "Installation complete"
 }
 
@@ -2022,11 +2030,18 @@ install_server_only() {
     open_firewall_ports
     INSTALLED_SERVER="y"
     save_config
-    
+
+    echo ""
+    echo "════════════════════════════════════════════════════════"
+    print_success "Local network install complete"
+    echo ""
+    echo "Server and devices are reachable over internal LAN network only."
+    echo "To add internet calling capability, continue with the setup below."
+    echo "════════════════════════════════════════════════════════"
     echo ""
     read -p "Run Internet/Certificate Setup wizard now? [Y/n]: " run_setup
     [[ ! "$run_setup" =~ ^[Nn]$ ]] && setup_internet_access
-    
+
     print_success "Server installed"
 }