feat(frontend): host les fenêtres plugin et l'API publique windows.open

Ajoute la vue window host qui charge le layout plugin dans une fenêtre OS
détachée, expose react/react-dom/jsx-runtime hébergés sous
frontend/public/plugin-host pour que le runtime SDK y résolve React, et
câble services.windows.open() côté runtime plugin (loader/services/registry).

npm test -- --run src/adapters/window.test.ts src/app/ViewWindow.test.tsx
  src/plugins/runtime/loader.test.ts src/plugins/runtime/services.test.ts : 39/39
npm run typecheck : OK
npm run build : OK

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/public/plugin-host/react-dom-client.js

@@ -0,0 +1,5 @@
+const ReactDomClient = globalThis.__IDEA_PLUGIN_HOST_REACT_DOM_CLIENT__;
+
+export const createRoot = ReactDomClient.createRoot;
+export const hydrateRoot = ReactDomClient.hydrateRoot;
+export const version = ReactDomClient.version;

frontend/public/plugin-host/react-dom.js

@@ -0,0 +1,16 @@
+const ReactDom = globalThis.__IDEA_PLUGIN_HOST_REACT_DOM__;
+
+export default ReactDom;
+export const createPortal = ReactDom.createPortal;
+export const flushSync = ReactDom.flushSync;
+export const preconnect = ReactDom.preconnect;
+export const prefetchDNS = ReactDom.prefetchDNS;
+export const preinit = ReactDom.preinit;
+export const preinitModule = ReactDom.preinitModule;
+export const preload = ReactDom.preload;
+export const preloadModule = ReactDom.preloadModule;
+export const requestFormReset = ReactDom.requestFormReset;
+export const unstable_batchedUpdates = ReactDom.unstable_batchedUpdates;
+export const useFormState = ReactDom.useFormState;
+export const useFormStatus = ReactDom.useFormStatus;
+export const version = ReactDom.version;

frontend/public/plugin-host/react-jsx-dev-runtime.js

@@ -0,0 +1,4 @@
+const Runtime = globalThis.__IDEA_PLUGIN_HOST_REACT_JSX_DEV_RUNTIME__;
+
+export const Fragment = Runtime.Fragment;
+export const jsxDEV = Runtime.jsxDEV;

frontend/public/plugin-host/react-jsx-runtime.js

@@ -0,0 +1,5 @@
+const Runtime = globalThis.__IDEA_PLUGIN_HOST_REACT_JSX_RUNTIME__;
+
+export const Fragment = Runtime.Fragment;
+export const jsx = Runtime.jsx;
+export const jsxs = Runtime.jsxs;

frontend/public/plugin-host/react.js

@@ -0,0 +1,35 @@
+const React = globalThis.__IDEA_PLUGIN_HOST_REACT__;
+
+export default React;
+export const Children = React.Children;
+export const Component = React.Component;
+export const Fragment = React.Fragment;
+export const Profiler = React.Profiler;
+export const PureComponent = React.PureComponent;
+export const StrictMode = React.StrictMode;
+export const Suspense = React.Suspense;
+export const cloneElement = React.cloneElement;
+export const createContext = React.createContext;
+export const createElement = React.createElement;
+export const createRef = React.createRef;
+export const forwardRef = React.forwardRef;
+export const isValidElement = React.isValidElement;
+export const lazy = React.lazy;
+export const memo = React.memo;
+export const startTransition = React.startTransition;
+export const useCallback = React.useCallback;
+export const useContext = React.useContext;
+export const useDebugValue = React.useDebugValue;
+export const useDeferredValue = React.useDeferredValue;
+export const useEffect = React.useEffect;
+export const useId = React.useId;
+export const useImperativeHandle = React.useImperativeHandle;
+export const useInsertionEffect = React.useInsertionEffect;
+export const useLayoutEffect = React.useLayoutEffect;
+export const useMemo = React.useMemo;
+export const useReducer = React.useReducer;
+export const useRef = React.useRef;
+export const useState = React.useState;
+export const useSyncExternalStore = React.useSyncExternalStore;
+export const useTransition = React.useTransition;
+export const version = React.version;