refactor: modularize launcher UI and native services with verified IO

src/types/launcher.ts

@@ -0,0 +1,74 @@
+export type AccountMode = 'microsoft' | 'offline'
+
+export interface Server {
+  id: string
+  kicker: string
+  name: string
+  subtitle: string
+  version: string
+  composition: string
+  loader: string
+  profileId?: string
+  disabled?: boolean
+}
+
+export interface NativeHost {
+  platform: string
+  dataDir: string
+  launcherVersion: string
+}
+
+export interface LauncherSettings {
+  memoryMb: number
+  nickname: string
+  accountMode: AccountMode
+}
+
+export interface JavaInstallation {
+  executable: string
+  major: number
+  version: string
+}
+
+export interface ProfileInspection {
+  root: string
+  managedFiles: number
+  missingFiles: number
+  mismatchedFiles: number
+  upToDate: boolean
+}
+
+export interface SyncResult {
+  root: string
+  downloadedFiles: number
+  reusedFiles: number
+  downloadedBytes: number
+}
+
+export interface MinecraftProfile {
+  id: string
+  name: string
+}
+
+export interface DeviceCodePayload {
+  verificationUri: string
+  userCode: string
+  expiresInSeconds: number
+}
+
+export interface LoginResultPayload {
+  ok: boolean
+  profile: MinecraftProfile | null
+  error: string | null
+}
+
+export interface InstallProgressPayload {
+  stage: 'java' | 'neoforge' | 'libraries' | 'assets'
+  currentBytes: number
+  totalBytes: number
+}
+
+export interface GameExitedPayload {
+  profileId: string
+  exitCode: number | null
+}