CRITICAL FIX: Add /dev/tty error handling to handle_loadwatch_analyzer() and remove pipe from show_system_overview()

- Fix line 482: handle_loadwatch_analyzer() read without error handler
  * Add /dev/tty redirection with proper error handling
  * Returns gracefully if read fails instead of crashing
- Fix line 126: show_system_overview() uses pipe to sed
  * Replace pipe with bash parameter expansion to avoid pipe failures
  * Remove unsafe sed dependency, use ${var%,} to trim trailing comma
  * More robust error handling

Impact: Prevents additional crash scenarios and improves reliability of system display.

launcher.sh

@@ -123,8 +123,8 @@ show_system_overview() {
     # PHP Versions
     if [ ${#SYS_PHP_VERSIONS[@]} -gt 0 ]; then
         echo -n "  PHP Versions: "
-        printf '%s, ' "${SYS_PHP_VERSIONS[@]}" | sed 's/, $//'
-        echo ""
+        local php_list=$(printf '%s, ' "${SYS_PHP_VERSIONS[@]}")
+        echo "${php_list%, }"
     fi
 
     # Firewall
@@ -479,7 +479,9 @@ handle_loadwatch_analyzer() {
     echo -e "──────────────────────────────────────────────────────────────"
     echo -n "Select time range: "
 
-    read -r range_choice < /dev/tty
+    if ! read -r range_choice </dev/tty 2>/dev/null; then
+        return 0  # Exit if read fails
+    fi
 
     case "$range_choice" in
         1) run_module "diagnostics" "loadwatch-analyzer.sh" "-r" "1h" ;;