chore(ui): refactor workspace to monorepo (#70)

## Summary by Sourcery

Refactor the UI project structure into a pnpm monorepo packages layout
and align tooling and automation with the new paths.

Enhancements:
- Reorganize the UI app from the root ui directory into packages/ui
within a pnpm workspace.
- Update pnpm workspace configuration to include all packages under
packages/*.
- Adjust paths in changeset configuration so the @dropout/ui package
resolves from packages/ui.

Build:
- Update pre-commit configuration paths and arguments to reflect the new
UI location and normalize hook argument formatting.
- Update Dependabot configuration so npm updates target /packages/ui
instead of /ui.

CI:
- Update GitHub Actions workflows to watch packages/** instead of ui/**
and to run frontend tasks from packages/ui.
- Update pnpm cache dependency paths in workflows to use the root
pnpm-lock.yaml.
- Simplify frontend install steps in test workflows to run from the
repository root.

Chores:
- Add a new index.html under packages/ui and remove the old
ui/index.html to match the new project layout.

1 files changed, 232 insertions, 0 deletions

diff --git a/packages/ui/src/types/index.ts b/packages/ui/src/types/index.ts
new file mode 100644
index 0000000..b4412b8
--- /dev/null
+++ b/packages/ui/src/types/index.ts
@@ -0,0 +1,232 @@
+export type ViewType = "home" | "versions" | "settings" | "guide" | "instances";
+
+export interface Version {
+  id: string;
+  type: string;
+  url: string;
+  time: string;
+  releaseTime: string;
+  javaVersion?: number; // Java major version requirement (e.g., 8, 17, 21)
+  isInstalled?: boolean; // Whether this version is installed locally
+}
+
+export interface Account {
+  type: "Offline" | "Microsoft";
+  username: string;
+  uuid: string;
+  access_token?: string;
+  refresh_token?: string;
+  expires_at?: number; // Unix timestamp for Microsoft accounts
+}
+
+export interface DeviceCodeResponse {
+  user_code: string;
+  device_code: string;
+  verification_uri: string;
+  expires_in: number;
+  interval: number;
+  message?: string;
+}
+
+export interface AssistantConfig {
+  enabled: boolean;
+  llm_provider: "ollama" | "openai";
+  // Ollama settings
+  ollama_endpoint: string;
+  ollama_model: string;
+  // OpenAI settings
+  openai_api_key?: string;
+  openai_endpoint: string;
+  openai_model: string;
+  // Common settings
+  system_prompt: string;
+  response_language: string;
+  // TTS settings
+  tts_enabled: boolean;
+  tts_provider: string;
+}
+
+export interface ModelInfo {
+  id: string;
+  name: string;
+  size?: string;
+  details?: string;
+}
+
+export interface LauncherConfig {
+  min_memory: number;
+  max_memory: number;
+  java_path: string;
+  width: number;
+  height: number;
+  download_threads: number;
+  custom_background_path?: string;
+  enable_gpu_acceleration: boolean;
+  enable_visual_effects: boolean;
+  active_effect: string;
+  theme: string;
+  log_upload_service: "paste.rs" | "pastebin.com";
+  pastebin_api_key?: string;
+  assistant: AssistantConfig;
+  // Storage management
+  use_shared_caches: boolean;
+  keep_legacy_per_instance_storage: boolean;
+  // Feature-gated argument flags
+  feature_flags: FeatureFlags;
+}
+
+export interface FeatureFlags {
+  demo_user: boolean;
+  quick_play_enabled: boolean;
+  quick_play_path?: string;
+  quick_play_singleplayer: boolean;
+  quick_play_multiplayer_server?: string;
+}
+
+export interface JavaInstallation {
+  path: string;
+  version: string;
+  is_64bit: boolean;
+}
+
+export interface JavaDownloadInfo {
+  version: string;
+  release_name: string;
+  download_url: string;
+  file_name: string;
+  file_size: number;
+  checksum: string | null;
+  image_type: string;
+}
+
+export interface JavaReleaseInfo {
+  major_version: number;
+  image_type: string;
+  version: string;
+  release_name: string;
+  release_date: string | null;
+  file_size: number;
+  checksum: string | null;
+  download_url: string;
+  is_lts: boolean;
+  is_available: boolean;
+  architecture: string;
+}
+
+export interface JavaCatalog {
+  releases: JavaReleaseInfo[];
+  available_major_versions: number[];
+  lts_versions: number[];
+  cached_at: number;
+}
+
+export interface JavaDownloadProgress {
+  file_name: string;
+  downloaded_bytes: number;
+  total_bytes: number;
+  speed_bytes_per_sec: number;
+  eta_seconds: number;
+  status: string;
+  percentage: number;
+}
+
+export interface PendingJavaDownload {
+  major_version: number;
+  image_type: string;
+  download_url: string;
+  file_name: string;
+  file_size: number;
+  checksum: string | null;
+  install_path: string;
+  created_at: number;
+}
+
+export type JavaDownloadSource = "adoptium" | "mojang" | "azul";
+
+// ==================== Fabric Types ====================
+
+export interface FabricGameVersion {
+  version: string;
+  stable: boolean;
+}
+
+export interface FabricLoaderVersion {
+  separator: string;
+  build: number;
+  maven: string;
+  version: string;
+  stable: boolean;
+}
+
+export interface FabricLoaderEntry {
+  loader: FabricLoaderVersion;
+  intermediary: {
+    maven: string;
+    version: string;
+    stable: boolean;
+  };
+  launcherMeta: {
+    version: number;
+    mainClass: {
+      client: string;
+      server: string;
+    };
+  };
+}
+
+export interface InstalledFabricVersion {
+  id: string;
+  minecraft_version: string;
+  loader_version: string;
+  path: string;
+}
+
+// ==================== Forge Types ====================
+
+export interface ForgeVersion {
+  version: string;
+  minecraft_version: string;
+  recommended: boolean;
+  latest: boolean;
+}
+
+export interface InstalledForgeVersion {
+  id: string;
+  minecraft_version: string;
+  forge_version: string;
+  path: string;
+}
+
+// ==================== Mod Loader Type ====================
+
+export type ModLoaderType = "vanilla" | "fabric" | "forge";
+
+// ==================== Instance Types ====================
+
+export interface Instance {
+  id: string;
+  name: string;
+  game_dir: string;
+  version_id?: string;
+  created_at: number;
+  last_played?: number;
+  icon_path?: string;
+  notes?: string;
+  mod_loader?: string;
+  mod_loader_version?: string;
+  jvm_args_override?: string;
+  memory_override?: MemoryOverride;
+}
+
+export interface MemoryOverride {
+  min: number; // MB
+  max: number; // MB
+}
+
+export interface FileInfo {
+  name: string;
+  path: string;
+  is_directory: boolean;
+  size: number;
+  modified: number;
+}