refactor

web/tsconfig.app.json

@@ -27,5 +27,11 @@
     "types": ["vitest/globals", "@testing-library/jest-dom"],
     "paths": { "@/*": ["./src/*"] }
   },
-  "include": ["src"]
+  // The production build must not compile test files. One test imports the shipped
+  // SDK source across packages (`sdk/src/*.js`) to drive the real custom elements; that
+  // coupling belongs to the test project (tsconfig.test.json), not to the app image
+  // build, where the SDK may not even be on disk yet. `tsc -p tsconfig.app.json` is what
+  // the Dockerfile runs, so tests are simply out of this project's file set.
+  "include": ["src"],
+  "exclude": ["src/**/*.test.ts", "src/**/*.test.tsx", "src/test"]
 }