v1.7.0

Added

• HTML editor (webroot/js/editor.js): built-in contenteditable WYSIWYG with toolbar (block/inline formatting, lists, alignment, links, images, source mode)
• Link and image property dialogs with inline File Manager browse (browseFiles / browseImages)
• Bulgarian translations for editor UI strings

Changed

• FormHelper html control: replace TinyMCE with the built-in editor (no external CDN or API key)
• Admin.Editor: apiKey removed; optional height setting for editor content area
• Form/editor element and editor.css redesigned for the new toolbar and dialogs
• file-browser.js: extended for editor link/image picker integration
• Documentation updates (HELPERS.md, CONFIGURATION.md, FILEMANAGER.md)

Removed

• TinyMCE dependency and Admin.Editor.apiKey configuration