fix(platform): stop tsconfig paths from shadowing the @platform alias

The `@platform/*` entry in `apps/site/tsconfig.json` was being picked up
by `tsconfig-paths-webpack-plugin` before webpack's `resolve.alias`,
which caused the Cloudflare worker bundle to include the default
platform's MDX config (`wasm: true`) instead of cloudflare's
(`wasm: false`). At runtime the worker hit
`WebAssembly.instantiate(): Wasm code generation disallowed by embedder`.

Drop the tsconfig path, declare a wildcard ambient module
`@platform/*` for `lint:types`, and let webpack's alias be the sole
source of truth for `@platform/*` resolution. The alias can now be the
plain package specifier, so the `createRequire` + `dirname` workaround
goes away too.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Author: ovflowd

apps/site/next.config.mjs

@@ -20,10 +20,6 @@ const { default: platform } = await import(`${PLATFORM_ALIAS}/next.config.mjs`);
 const platformImages = await platform.images?.();
 const platformNextConfig = await platform.nextConfig?.();
 
-// Single wildcard alias: `@platform/<file>` resolves to
-// `@node-core/platform-${DEPLOY_TARGET}/<file>` so each deploy target's
-// files (analytics slot, instrumentation, MDX/Shiki config) are picked
-// up automatically without per-file mappings.
 const platformAliases = { '@platform': PLATFORM_ALIAS };
 
 /** @type {import('next').NextConfig} */

apps/site/next.platform.modules.d.ts

@@ -0,0 +1,9 @@
+/**
+ * Wildcard ambient module declaration for the `@platform/*` webpack alias.
+ *
+ * The alias is resolved at build time by `apps/site/next.config.mjs` to the
+ * active `@node-core/platform-<target>` package. We declare it here (rather
+ * than via `tsconfig.json`'s `paths`) so that `tsconfig-paths-webpack-plugin`
+ * can't shadow the webpack alias and bundle the wrong platform's files.
+ */
+declare module '@platform/*';

apps/site/tsconfig.json

@@ -17,15 +17,7 @@
     "jsx": "react-jsx",
     "incremental": true,
     "plugins": [{ "name": "next" }],
-    "baseUrl": ".",
-    "paths": {
-      "@platform/*": [
-        "../../platforms/default/*",
-        "../../platforms/default/*.ts",
-        "../../platforms/default/*.tsx",
-        "../../platforms/default/*.mjs"
-      ]
-    }
+    "baseUrl": "."
   },
   "mdx": {
     "checkMdx": true