fix: use __IS_RENDERER__ constant for treeshaking node-only imports

The recent change to guard Node-only code with `typeof window !== 'undefined' && window.main != null` broke Vite's treeshaking because the expression is not statically resolvable at build time. This caused Rollup to include both the renderer (IPC) and Node-only code paths, pulling transitive imports of `node:url` and `node:crypto` into the renderer bundle.

Introduced `__IS_RENDERER__` constant in the Vite `define` block (set to `true` for the renderer build) which is statically resolvable, allowing Rollup to eliminate the Node-only branch via dead code elimination.

Also added the constant declarations to a new `types/vite.d.ts` file so TypeScript recognizes `__IS_RENDERER__` as a valid global constant.

Fixes: MISSING_EXPORT error for node:url and node:crypto in curl.ts, openapi-3.ts, and swagger-2.ts

packages/insomnia/src/common/import.ts

@@ -92,7 +92,7 @@ export async function fetchImportContentFromURI({ uri }: { uri: string }) {
   } else if (uri.match(/^(file):\/\//)) {
     const path = uri.replace(/^(file):\/\//, '');
     const readFileProcessFork = async (path: string) =>
-      typeof window !== 'undefined' && window.main != null
+      __IS_RENDERER__
         ? window.main.insecureReadFile({ path })
         : (await import('../main/secure-read-file')).insecureReadFile(path);
 
@@ -207,7 +207,7 @@ export async function scanResources(importEntries: ImportEntry[]): Promise<ScanR
           };
         } else {
           const convertProcessFork =
-            typeof window !== 'undefined' && window.main != null
+            __IS_RENDERER__
               ? window.main.parseImport
               : (await import('../main/importers/convert')).convert;
           result = (await convertProcessFork(importEntry)) as unknown as ConvertResult;

packages/insomnia/tsconfig.json

@@ -31,7 +31,7 @@
     "verbatimModuleSyntax": true,
     "forceConsistentCasingInFileNames": true
   },
-  "include": ["**/*", ".react-router/types/**/*"],
+  "include": ["types/global.d.ts", "**/*", ".react-router/types/**/*"],
   "exclude": [
     "./src/__mocks__/@getinsomnia/node-libcurl.ts",
     "**/__mocks__",

packages/insomnia/types/global.d.ts

@@ -63,6 +63,7 @@ declare global {
 }
 
 declare const __DEV__: boolean;
+declare const __IS_RENDERER__: boolean;
 
 declare namespace NodeJS {
   interface Global {

packages/insomnia/types/vite.d.ts

@@ -0,0 +1,4 @@
+/// <reference types="vite/client" />
+
+declare const __DEV__: boolean;
+declare const __IS_RENDERER__: boolean;

packages/insomnia/vite.config.ts

@@ -12,6 +12,7 @@ export default defineConfig(({ mode }) => {
   return {
     define: {
       '__DEV__': JSON.stringify(__DEV__),
+      '__IS_RENDERER__': JSON.stringify(true),
       'process.env.NODE_ENV': JSON.stringify(mode),
       'process.env.INSOMNIA_ENV': JSON.stringify(mode),
       // Only apply in production builds: Rollup does text substitution (safe).