refactor: convert to bun workspaces monorepo

- Move web app into apps/web/
- Create packages/shared/ with shared types
- Create plugins/decky-vault/ scaffold
- Root package.json manages workspaces only

plugins/decky-vault/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@deckyvault/plugin",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "rollup -c",
+    "dev": "rollup -c -w"
+  },
+  "dependencies": {
+    "@deckyvault/shared": "workspace:*"
+  },
+  "devDependencies": {
+    "@rollup/plugin-commonjs": "^28",
+    "@rollup/plugin-typescript": "^12",
+    "rollup": "^4",
+    "typescript": "^5"
+  }
+}

plugins/decky-vault/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "DeckyVault",
+  "version": "0.1.0",
+  "description": "Automatically record performance metrics and export/upload to DeckyVault",
+  "author": "DeckyVault",
+  "license": "MIT",
+  "icon": "",
+  "permissions": ["system"]
+}

plugins/decky-vault/rollup.config.js

@@ -0,0 +1,20 @@
+import typescript from "@rollup/plugin-typescript"
+import commonjs from "@rollup/plugin-commonjs"
+
+export default {
+  input: "src/index.tsx",
+  output: {
+    file: "dist/index.js",
+    format: "esm",
+    sourcemap: false,
+  },
+  plugins: [
+    typescript(),
+    commonjs(),
+  ],
+  external: [
+    "react",
+    "react-dom",
+    "@deckyvault/shared",
+  ],
+}

plugins/decky-vault/src/index.tsx

@@ -0,0 +1,32 @@
+import { DeckyVaultImportV1 } from "@deckyvault/shared"
+
+interface PluginSettings {
+  apiKey: string
+  autoRecord: boolean
+  exportPath: string
+}
+
+let settings: PluginSettings = {
+  apiKey: "",
+  autoRecord: false,
+  exportPath: "/home/deck/Downloads",
+}
+
+export default {
+  name: "DeckyVault",
+  content: () => {
+    // Main plugin UI — will be implemented in a future phase
+    return <div>DeckyVault Plugin</div>
+  },
+  onSettingUpdate: (newSettings: Partial<PluginSettings>) => {
+    settings = { ...settings, ...newSettings }
+  },
+  onGameSessionStart: (appId: number) => {
+    DeckyPlugin.log(`[DeckyVault] Game started: ${appId}`)
+    // Future: start MangoHud monitoring
+  },
+  onGameSessionEnd: (appId: number) => {
+    DeckyPlugin.log(`[DeckyVault] Game stopped: ${appId}`)
+    // Future: stop monitoring, prompt export/upload
+  },
+}

plugins/decky-vault/src/types.d.ts

@@ -0,0 +1,32 @@
+// Decky Loader API type declarations
+// These mirror the APIs available in the Steam Deck game mode CEF context
+
+declare global {
+  const DeckyPlugin: {
+    log: (...args: unknown[]) => void
+    debug: (...args: unknown[]) => void
+    info: (...args: unknown[]) => void
+    error: (...args: unknown[]) => void
+  }
+
+  const SteamClient: {
+    Apps: {
+      GetAppData: (appId: number) => Promise<{
+        strAppName: string
+        strShortcutName: string
+        strExePath: string
+      }>
+      RegisterForGameStarted: (
+        callback: (appId: number) => void,
+      ) => { unregister: () => void }
+      RegisterForGameStopped: (
+        callback: (appId: number) => void,
+      ) => { unregister: () => void }
+    }
+    System: {
+      GetOSVersion: () => Promise<string>
+    }
+  }
+}
+
+export {}

plugins/decky-vault/tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "jsx": "react-jsx",
+    "jsxImportSource": "react",
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "declaration": false,
+    "sourceMap": false,
+    "esModuleInterop": true
+  },
+  "include": ["src"],
+  "references": [
+    { "path": "../../packages/shared" }
+  ]
+}