feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

videodb/profile.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * Profile page
+ *
+ * Handles saving of the various config options for the user.
+ *
+ * @package Setup
+ * @author  Andreas Gohr    <a.gohr@web.de>
+ * @version $Id: profile.php,v 2.19 2008/04/20 17:31:20 andig2 Exp $
+ */
+
+require_once './core/functions.php';
+require_once './core/setup.core.php';
+
+/**
+ * input
+ */
+$user_id = get_current_user_id();
+$save = req_int('save');
+// all other input are within `if (save) foreach {}`
+
+// really shouldn't happen
+if (empty($user_id))
+{
+	errorpage('Access denied', 'You don\'t have enough permissions to access this '.
+			  'page. Please <a href="login.php">login</a> first. '.
+              '(This feature is not available in Single User Mode)');
+}
+
+// save data
+if ($save)
+{
+	// insert data
+	foreach ($SETUP_USER as $opt) 
+    {
+        $val = req_string($opt);
+        if ($opt == 'languageflags') {
+            // convert languages array back into string
+            $val = @join('::', req_array('languages'));
+        }
+        $SQL = "REPLACE INTO ".TBL_USERCONFIG." (user_id, opt, value) 
+                      VALUES ('" . escapeSQL($user_id) . "', '$opt', '" . escapeSQL($val) . "')";
+		runSQL($SQL);
+	}
+
+    // update session variables
+    update_session();
+	
+	// reload config
+	load_config(true);
+    
+/*
+    // clear compiled templates for new template
+    AG: should not be required
+    $smarty->clear_compiled_tpl(null, $config['cacheid']);
+*/ 
+}
+
+// prepare options
+$setup = setup_mkOptions(true);
+
+// prepare templates
+tpl_page('profile');
+
+$smarty->assign('setup', $setup);
+
+// display templates
+tpl_display('profile.tpl');
+