- ReaderView: complete rewrite with CSS styling, headers, attachments, zoom, find, dark mode, image blocking
- Categories: DAO + UI tree widget with colors, nested categories, assignment
- Rules engine: DAO + evaluation + actions (move, mark read, flag, delete, category, forward)
- Templates: DAO + editor + manager with variables support
- Signatures: DAO + manager + auto-per-account + manual selector in compose
- ComposeView: signature combo, template selector, auto-signature on new email
- MainWindow: frameless with rounded corners, 1px border, resize from edges, no status bar
- Database: new tables (Category, MailCategory, Rule, Template, Signature) with indexes
- Added missing initialization of IMAP synchronizer before fetching mail items
- Fixed missing semicolon in error message
- This ensures IMAP connection parameters (host, port, SSL, credentials) are properly set
- Fixes the issue where breakpoints in ImapSynchronizer::initialize() were never hit
- Enables both manual folder sync and automatic SyncScheduler to work correctly
javier