feat: Add complete Docker deployment with web-based setup wizard

Major additions:
- Web-based setup wizard (setup.php, setup_wizard.php, setup-wizard.js)
- Production Docker configuration (docker-compose.prod.yml, .env.production)
- Database initialization SQL files (deploy/init_settings.sql)
- Template builder system with drag-and-drop UI
- Advanced features (OAuth, CDN, enhanced analytics, monetization)
- Comprehensive documentation (deployment guides, quick start, feature docs)
- Design system with accessibility and responsive layout
- Deployment automation scripts (deploy.ps1, generate-secrets.ps1)

Setup wizard allows customization of:
- Platform name and branding
- Domain configuration
- Membership tiers and pricing
- Admin credentials
- Feature toggles

Database includes 270+ tables for complete video streaming platform with
advanced features for analytics, moderation, template building, and monetization.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

f_core/f_classes/class.userinfo.php

@@ -18,7 +18,7 @@ defined('_ISVALID') or header('Location: /error');
 class VUserinfo
 {
     /* valid username format */
-    public function isValidUsername($username)
+    public static function isValidUsername($username)
     {
         global $cfg;
 
@@ -42,12 +42,12 @@ class VUserinfo
         return true;
     }
     /* remove chars from string */
-    public function clearString($username)
+    public static function clearString($username)
     {
         return preg_replace('/[^a-zA-Z0-9@_.\-]/', '', $username);
     }
     /* check for existing username */
-    public function existingUsername($username, $section = 'frontend')
+    public static function existingUsername($username, $section = 'frontend')
     {
         global $db, $class_database;
 
@@ -76,7 +76,7 @@ class VUserinfo
         }
     }
     /* check for existing email */
-    public function existingEmail($email, $section = 'frontend')
+    public static function existingEmail($email, $section = 'frontend')
     {
         global $db, $class_filter;
 
@@ -105,7 +105,7 @@ class VUserinfo
         }
     }
     /* get user id from other fields */
-    public function getUserID($user, $where_field = 'usr_user')
+    public static function getUserID($user, $where_field = 'usr_user')
     {
         global $db, $class_filter;
         $user = $where_field == 'usr_user' ? self::clearString($user) : $class_filter->clr_str($user);
@@ -113,14 +113,14 @@ class VUserinfo
         return $q->fields['usr_id'];
     }
     /* get user name from other fields */
-    public function getUserName($user, $where_field = 'usr_id')
+    public static function getUserName($user, $where_field = 'usr_id')
     {
         global $db, $class_filter;
         $q = $db->execute(sprintf("SELECT `usr_user` FROM `db_accountuser` WHERE `" . $where_field . "`='%s' LIMIT 1;", $class_filter->clr_str($user)));
         return $q->fields['usr_user'];
     }
     /* get email from user id */
-    public function getUserEmail($user = '')
+    public static function getUserEmail($user = '')
     {
         global $db, $smarty;
         switch ($user) {
@@ -133,7 +133,7 @@ class VUserinfo
         return $usr_email;
     }
     /* get various user details */
-    public function getUserInfo($user_id)
+    public static function getUserInfo($user_id)
     {
         global $db;
 
@@ -163,7 +163,7 @@ class VUserinfo
         return $info;
     }
     /* username validation */
-    public function usernameVerification($username, $section = 'frontend')
+    public static function usernameVerification($username, $section = 'frontend')
     {
         global $cfg, $language;
 
@@ -182,7 +182,7 @@ class VUserinfo
         } else {return false;}
     }
     /* birthday input validation */
-    public function birthdayVerification($date)
+    public static function birthdayVerification($date)
     {
         global $cfg;
 
@@ -195,7 +195,7 @@ class VUserinfo
 
     }
     /* age from date */
-    public function ageFromString($date)
+    public static function ageFromString($date)
     {
         if (!preg_match("/([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})/", $date, $arr)) {
             return false;
@@ -211,7 +211,7 @@ class VUserinfo
         return $age;
     }
     /* generate random strings */
-    public function generateRandomString($length = 10, $alphanumeric = false)
+    public static function generateRandomString($length = 10, $alphanumeric = false)
     {
         if (!$alphanumeric) {
             $str = join('', array_map(function ($value) {return $value == 1 ? mt_rand(1, 3) : mt_rand(0, 9);}, range(1, $length)));
@@ -226,7 +226,7 @@ class VUserinfo
         return $str;
     }
     /* check for available username */
-    public function usernameAvailability($username, $section = 'frontend')
+    public static function usernameAvailability($username, $section = 'frontend')
     {
         global $cfg, $language;
 
@@ -248,7 +248,7 @@ class VUserinfo
         }
     }
     /* truncating strings */
-    public function truncateString($string, $max_length)
+    public static function truncateString($string, $max_length)
     {
         return mb_strimwidth($string, 0, $max_length, '...', 'utf-8');
 
@@ -264,7 +264,7 @@ class VUserinfo
         }
     }
     /* days from date */
-    public function timeRange($datetime)
+    public static function timeRange($datetime)
     {
         global $language;
 
@@ -314,7 +314,7 @@ class VUserinfo
     }
 
     /* days from date */
-    public function timeRange_old($datetime)
+    public static function timeRange_old($datetime)
     {
         global $language;
 
@@ -354,7 +354,7 @@ class VUserinfo
         }
     }
     /* unix timestamp */
-    public function convert_datetime($str)
+    public static function convert_datetime($str)
     {
         if ($str == '') {
             return false;