• Rename config/config_rss.php to config/rss.php
• Modernize admin/modules/rss.php:

- Update navi() to accept extra param for correct tab handling
- Use getVar() for input sanitization in save()
- Match array assignment style in save() to other modules
- Use checkConfigFile() and setConfigFile() helpers

• Update inclusions of rss config in core/core.php, core/user.php, modules/account/index.php, and modules/rss_info/index.php to use new filename and CONFIG_DIR constant.
• Minor cleanup in other admin modules (replace.php, referers.php, comments.php) to ensure consistency in getVar usage.

Admin Module Standardization:

• Renamed navigation functions: moduleNavi() → navi()
• Migrated from $admin_file to $aroute global variable
• Added (bool)$subtab type-cast in navi() functions
• Simplified function names: newsletterAdd() → add(), etc.

SQL Security Improvements:

• Converted escaped quotes \'1\' to integer literals 1
• Fixed UPDATE/INSERT queries: send = '0' → send = 0
• All SQL queries use Named Placeholders (:id, :title, etc.)

Code Structure:

• Extracted switch-case inline code into separate functions
• Added exit; after all header() redirects
• Simplified header URLs: removed redundant &op=show parameters
• Switch statements modernized: case 'show' → default

Monitor Module Enhancement:

• Converted 600+ line HTML block to Heredoc syntax
• Pre-calculated all variables before Heredoc block
• Replaced <?php echo $var; ?> with {$var} syntax
• Improved code readability and maintainability

Rules Documentation:

• Updated Section 22: Admin-Module Konventionen
• Documented $aroute usage pattern
• Documented simplified header redirects with exit;
• Documented switch-case extraction pattern

Impact:

• Enhanced security with consistent SQL Prepared Statements
• Improved code consistency across all admin modules
• Better maintainability with standardized patterns
• Reduced code duplication and complexity