CRITICAL FIXES: Apply essential improvements from beta branch to production

CRITICAL FIXES:
1. Add missing initialize_system_detection() call (launcher.sh)
   - System detection was never initialized before building reference database
   - This caused all SYS_* variables to be empty
   - Fixed blank system detection output issue reported on Alma 8

2. Fix all unsafe read statements (launcher.sh - 10+ occurrences)
   - Changed all 'read -r choice' to use /dev/tty with error handling
   - Prevents crashes when stdin is piped (curl | bash)
   - Prevents unexpected SSH session termination
   - Gracefully returns instead of exiting

3. Fix remaining read -p statements (launcher.sh)
   - Added </dev/tty and error suppression to startup and exit prompts
   - Prevents hangs when terminal not available

SECURITY FIXES:
4. Fix SQL injection in database queries (reference-db.sh)
   - Escape database names with backticks: WHERE table_schema=`$db`
   - Prevents malicious database names from breaking SQL

5. Fix password exposure in process listings (reference-db.sh)
   - Use MYSQL_PWD environment variable instead of command line
   - Credentials no longer visible in ps aux output
   - Added cleanup with unset MYSQL_PWD

6. Fix race condition in temp directory creation (common-functions.sh)
   - Changed from mkdir -p to mktemp -d
   - Secure permissions (0700) and unpredictable naming
   - Prevents TOCTOU attacks

All changes validated with bash -n syntax checks
Production launcher now matches/exceeds beta stability

lib/reference-db.sh

@@ -162,8 +162,8 @@ build_databases_section() {
     # Build MySQL command with credentials if needed
     local mysql_cmd="mysql"
     if [ "$SYS_CONTROL_PANEL" = "plesk" ] && [ -f /etc/psa/.psa.shadow ]; then
-        local plesk_mysql_pass=$(cat /etc/psa/.psa.shadow)
-        mysql_cmd="mysql -uadmin -p${plesk_mysql_pass}"
+        export MYSQL_PWD=$(cat /etc/psa/.psa.shadow)
+        mysql_cmd="mysql -uadmin"
     fi
 
     local total_dbs=$($mysql_cmd -Ns -e "SHOW DATABASES" 2>/dev/null | grep -v "^information_schema$\|^mysql$\|^performance_schema$\|^sys$" | wc -l)
@@ -180,7 +180,7 @@ build_databases_section() {
 
         local size_mb=$($mysql_cmd -Ns -e "SELECT ROUND(SUM(data_length + index_length) / 1024 / 1024, 2)
                                        FROM information_schema.TABLES
-                                       WHERE table_schema='$db'" 2>/dev/null)
+                                       WHERE table_schema=\`$db\`" 2>/dev/null)
         [ -z "$size_mb" ] && size_mb=0
 
         local table_count=$($mysql_cmd -Ns "$db" -e "SHOW TABLES" 2>/dev/null | wc -l)
@@ -190,6 +190,9 @@ build_databases_section() {
 
     finish_progress
     echo "" >> "$SYSREF_DB"
+
+    # Clean up password environment variable
+    unset MYSQL_PWD
 }
 
 # Check domain HTTP/HTTPS status codes