v0.1.2

[0.1.2] - 2026-06-28

UX improvements: window state persistence, drag-and-drop, toast
notifications, About dialog as AXAML, and expanded test coverage.

Added

• Window state persistence: MainWindow size, position, and maximized
  state are saved to AppConfiguration on close and restored on next
  launch. Multi-monitor negative coordinates are handled; sanity guards
  prevent restoring invalid geometry.
• Drag-and-drop support: dropping a folder onto the window opens it as
  a project; dropping a file reads its content and injects it into the
  active chat tab's input box as a fenced code block for LLM context.
• Toast notification system: transient overlay notifications (Info,
  Success, Warning, Error) displayed in the bottom-right corner with
  auto-dismiss. Triggered on project load, index rebuild success/failure,
  and index prewarm failure. Severity-colored icons (ℹ ✓ ⚠ ✗) via
  shared theme brushes.
• AboutWindow.axaml: dedicated AXAML window for the About dialog,
  replacing the inline code-built Window. Version is bound from
  AssemblyInformationalVersion (MinVer).
• Unit tests for QuickReferenceViewModel (9 tests): callbacks, classes,
  mod structure loading, sorting, no duplicates, REPENTOGON callbacks.
• Unit tests for TemplateGalleryViewModel (11 tests): template loading,
  scaffold validation, file creation, placeholder substitution, Lua
  string escaping, default name fallback.
• Unit tests for ToastService (12 tests): show info/success/warning/
  error, multiple toasts, dismiss, notification properties, icon
  mapping, custom duration.
• 4 toast colors added to Theme.axaml (info/success/warning/error).

Changed

• AppConfiguration.Save() now persists window state fields alongside
  existing LLM/embedding settings.
• MainViewModel exposes ToastService via Toasts property for UI
  binding.
• MainWindow.OnAbout simplified to create AboutWindow instead of
  building a Window inline.

Full Changelog: v0.1.1...v0.1.2