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Dark theme engine (Light/Dark/System) with registry-based system theme detection
Theme selector in status bar with persistence in language.json
Recursive theme application to all controls including dialogs
ListView OwnerDraw for themed headers, grid lines, and bot row colors
Native SysHeader32 background painting via NativeWindow subclass
Profile grouping with TreeView (collapsible groups, bold group nodes)
Add Group / Remove Group buttons with smart delete dialog
Drag-and-drop: profiles into/out of/between groups, group reorder
Start Selected extended to start all profiles in a group
ProfileData JSON format with backward-compatible migration
16 new localization keys across 4 languages (TR/EN/RU/DE)
.gitignore with .NET/VS artifacts and .apm exclusion
Special thx to @kis1yi
