fix(platform): type-check every embedded file and its tests

The app's tsconfig excluded all of platform/ and the zone's excluded embedded, so an
embedded file that app/o does not reach was never compiled, and its tests escaped
check:test-types. List the zone's paths instead, so both projects cover the tree.

Author: waleedlatif1

apps/sim/tsconfig.json

@@ -32,7 +32,17 @@
   "exclude": [
     "node_modules",
     ".next",
-    "platform",
+    "platform/app",
+    "platform/lib",
+    "platform/fixtures",
+    "platform/checks",
+    "platform/preview",
+    "platform/design-system",
+    "platform/.next",
+    "platform/node_modules",
+    "platform/next-env.d.ts",
+    "platform/next.config.ts",
+    "platform/proxy.ts",
     "**/*.test.ts",
     "**/*.test.tsx",
     "vitest.config.ts",

apps/sim/tsconfig.tests.json

@@ -1,4 +1,20 @@
 {
   "extends": "./tsconfig.json",
-  "exclude": ["node_modules", ".next", "platform", "vitest.config.ts", "vitest.setup.ts"]
+  "exclude": [
+    "node_modules",
+    ".next",
+    "platform/app",
+    "platform/lib",
+    "platform/fixtures",
+    "platform/checks",
+    "platform/preview",
+    "platform/design-system",
+    "platform/.next",
+    "platform/node_modules",
+    "platform/next-env.d.ts",
+    "platform/next.config.ts",
+    "platform/proxy.ts",
+    "vitest.config.ts",
+    "vitest.setup.ts"
+  ]
 }

scripts/check-test-types.ts

@@ -3,7 +3,9 @@
  * Ratchets type errors in apps/sim's unit tests down, per file and per error code.
  *
  * `apps/sim/tsconfig.json` excludes `*.test.ts(x)`, so `bun run type-check` never sees the ~3.4k
- * test files, and they carry thousands of type errors nobody is asked to fix today. Without a
+ * test files, and they carry thousands of type errors nobody is asked to fix today. That includes
+ * the tests under `platform/embedded`. The Platform zone's own tests stay out: its project
+ * (`platform/tsconfig.json`) compiles them in `type-check`, where any error fails. Without a
  * gate, every new test can add more, and a test whose mocks no longer match the code they stand
  * in for type-checks as fine as one that does. This check runs the native compiler (the root
  * `tsc`, which `check:native-typecheck` pins to TypeScript 7) on `apps/sim/tsconfig.tests.json`,