changelog

• Update .gitignore to allow setup/sql/*.sql files
• Add table.sql (database schema)
• Add insert.sql (initial data)
• Add table_update scripts for migrations:
- table_update4_1.sql
- table_update4_2.sql
- table_update4_3.sql
- table_update5_0.sql
- table_update5_1.sql
- table_update6_0.sql
- table_update6_2.sql
- table_update6_3.sql

These files are essential for installation and upgrades

Core System Changes:
• Rename core/core.php to core/system.php for better clarity
• Add core/legacy.php for backward compatibility
• Replace config/config_core.php with config/system.php
• Update all references from core.php to system.php
• Update copyright year to 2026

Code Improvements:
• Standardize code formatting (tabs to spaces)
• Update admin/index.php with improved module loading
• Modernize admin/modules/editor.php
• Update modules/account/index.php
• Update modules/changelog/index.php
• Update index.php core integration

Admin Interface:
• Add new admin panel icons:
- config.png (settings/configuration)
- gears.png (system operations)
- monitor.png (monitoring)
- remote.png (remote management)

Documentation:
• Update README.md with new file structure
• Update admin/info/editor-ru.html documentation

Cleanup:
• Remove 400+ obsolete upload files:
- Old account images and avatars
- Legacy content images (logos, backgrounds, souvenirs)
- Old screenshot thumbnails
- Deprecated demo site images
- Forum attachments
• Update index.html files in upload directories

• Replace $admin_file with $aroute in comments module
• Update config module indentation
• Update editor module
• Remove obsolete backup.txt

• Fix TypeError in setPageNumbers() by returning empty string when pages <= 1
• Add filterTextHighlight() function for search term highlighting
• Modernize users.php module following SLAED 6.3 standards:
- Rename users_navi() to navi()
- Replace $admin_file with $aroute
- Rename users_show() to users()
- Simplify variable names (chng_user → chng)
- Apply SLAED code formatting
- Extract inline switch cases to functions
- Add exit after header redirects

• Integrate basic-changelog and basic-changelog-commit templates
• Fix character encoding issues (copyright symbol, bullet points)
• Simplify Git log format string handling (remove Windows-specific escaping)
• Optimize commit rendering with template-based approach
• Update counter statistics and add new changelog module structure

Windows cmd.exe interprets % as environment variable prefix, causing
Git format placeholders (%H, %an, %ad, etc.) to be treated as undefined
variables instead of being passed to Git. This resulted in empty author
names and missing commit data in the Local Git changelog view.

Changes:
• Add Windows-specific % escaping (double %% for cmd.exe)
• Apply platform-specific date format handling
• Fix body parsing with explode limit to handle || in messages
• Remove escapeshellarg from format string to allow Git expansion

Added new config files for filetype and uploads configuration.
Removed deprecated config_uploads.php.
Updated admin templates for changelog and monitor modules.

Added changelog info files for German, English, French, Polish, Russian, and Ukrainian languages, plus German statistics info.

Updated multiple admin modules to follow SLAED 6.3 coding standards including template.php and other core modules.

Changed templsave() to use setConfigFile() instead of save_conf() with Heredoc syntax since line breaks are not needed for template configuration storage.