CRITICAL FIX: Add interactive mode detection to prevent tmux crash

- Add INTERACTIVE_MODE detection using $- variable
- Check if running in interactive shell at startup
- Exit gracefully from main menu if non-interactive
- Add INTERACTIVE_MODE checks to all submenu handlers
- All read operations now properly detect non-interactive environments

Root cause: In non-interactive shells (like when sourced via curl | tar xz),
/dev/tty doesn't exist. With set -eo pipefail, the read command fails and
causes script to crash. Now detects this and exits gracefully with a helpful message.

Impact: Fixes tmux crash on AlmaLinux 8 when pulling dev branch via curl.

launcher.sh

@@ -10,6 +10,14 @@
 
 set -eo pipefail
 
+# Check if running in interactive mode
+if [[ $- != *i* ]]; then
+    # Non-interactive mode - set flag for read operations
+    INTERACTIVE_MODE=0
+else
+    INTERACTIVE_MODE=1
+fi
+
 # Configuration
 SUITE_VERSION="2.1.0-BETA"
 BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -24,6 +32,18 @@ source "$LIB_DIR/domain-discovery.sh" || { echo "ERROR: Failed to load domain-di
 source "$LIB_DIR/user-manager.sh" || { echo "ERROR: Failed to load user-manager.sh"; return 1; }
 source "$LIB_DIR/reference-db.sh" || { echo "ERROR: Failed to load reference-db.sh"; return 1; }
 
+# Safe read helper function - handles both interactive and non-interactive modes
+safe_read_choice() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        # Non-interactive: return 1 to indicate read failed
+        return 1
+    fi
+
+    if ! read -r choice </dev/tty 2>/dev/null; then
+        return 1
+    fi
+}
+
 # Color codes
 RED='\033[0;31m'
 YELLOW='\033[1;33m'
@@ -198,6 +218,10 @@ show_threat_analysis_menu() {
 }
 
 handle_threat_analysis_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_threat_analysis_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -234,6 +258,10 @@ show_live_monitoring_menu() {
 }
 
 handle_live_monitoring_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_live_monitoring_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -268,6 +296,10 @@ show_log_viewers_menu() {
 }
 
 handle_log_viewers_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_log_viewers_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -301,6 +333,10 @@ show_security_actions_menu() {
 }
 
 handle_security_actions_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_security_actions_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -337,6 +373,10 @@ show_security_menu() {
 }
 
 handle_security_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_security_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -387,6 +427,10 @@ show_website_menu() {
 }
 
 handle_website_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_website_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -442,6 +486,10 @@ show_performance_menu() {
 }
 
 handle_performance_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_performance_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -463,6 +511,10 @@ handle_performance_menu() {
 }
 
 handle_loadwatch_analyzer() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     show_banner
     echo -e "📊 Loadwatch Health Analyzer"
     echo ""
@@ -552,6 +604,10 @@ show_acronis_menu() {
 }
 
 handle_backup_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_backup_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -569,6 +625,10 @@ handle_backup_menu() {
 }
 
 handle_acronis_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_acronis_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -625,6 +685,10 @@ show_email_menu() {
 }
 
 handle_email_menu() {
+    if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+        return 0  # Non-interactive mode, exit
+    fi
+
     while true; do
         show_email_menu
         if ! read -r choice </dev/tty 2>/dev/null; then
@@ -727,6 +791,14 @@ main() {
     while true; do
         show_main_menu
 
+        # Check if interactive mode
+        if [ "$INTERACTIVE_MODE" -eq 0 ]; then
+            echo ""
+            echo "Non-interactive mode: Use this toolkit in an interactive terminal."
+            echo "Try: source run.sh"
+            return 0
+        fi
+
         # Read from terminal (use /dev/tty directly for interaction)
         if ! read -r choice </dev/tty 2>/dev/null; then
             # No terminal available, return from function gracefully