changes

spa/eslint.config.js

@@ -15,6 +15,20 @@ export default [
     },
   },
   {
-    ignores: ["eslint.config.js", ".prettierrc"],
+    ignores: [
+      "eslint.config.js",
+      ".prettierrc",
+      // Plain JS outside the TypeScript project, so the type-aware rules
+      // cannot parse it at all.
+      "public/**",
+      // Regenerated by TanStack Router on every build; its own header asks to
+      // be excluded from linters.
+      "src/routeTree.gen.ts",
+      // Vendored from the shadcn registry and re-fetched by `shadcn add`, so a
+      // fix here does not survive. Its optional chains guard against runtime
+      // shapes that are looser than the types third-party libraries declare,
+      // which is exactly what no-unnecessary-condition cannot see.
+      "src/components/ui/**",
+    ],
   },
 ]