feat: add types and app config registry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/types/index.ts

@@ -0,0 +1,40 @@
+import type { ComponentType } from 'react';
+
+export interface WindowState {
+  id: string;
+  isOpen: boolean;
+  isMinimized: boolean;
+  isMaximized: boolean;
+  zIndex: number;
+  position: { x: number; y: number };
+  size: { width: number; height: number };
+  prevPosition: { x: number; y: number };
+  prevSize: { width: number; height: number };
+}
+
+export interface AppConfig {
+  id: string;
+  title: string;
+  emoji: string;
+  iconGradient: string;
+  defaultSize: { width: number; height: number };
+  defaultPosition: { x: number; y: number };
+  component: ComponentType;
+  desktopPosition: { col: number; row: number };
+}
+
+export interface OSState {
+  windows: Record<string, WindowState>;
+  topZ: number;
+  wallpaper: number;
+}
+
+export type OSAction =
+  | { type: 'OPEN'; id: string }
+  | { type: 'CLOSE'; id: string }
+  | { type: 'MINIMIZE'; id: string }
+  | { type: 'MAXIMIZE'; id: string; viewportWidth: number; viewportHeight: number }
+  | { type: 'FOCUS'; id: string }
+  | { type: 'MOVE'; id: string; x: number; y: number }
+  | { type: 'RESIZE'; id: string; width: number; height: number }
+  | { type: 'SET_WALLPAPER'; index: number };