refactor: clean up duplicate imports and dead code

- Merge type and value imports from the same module into single imports
- Remove dead import-badges action (flow uses /api/admin/import/badges)
- Remove unused babel-plugin-react-compiler devDependency
- Remove stray test.txt file
- Update knip config: track css imports, drop redundant ignore entries
- Update contract test to drop obsolete dead-action assertion

src/lib/api-handler.ts

@@ -1,5 +1,4 @@
-import type { NextRequest } from "next/server";
-import { NextResponse } from "next/server";
+import { type NextRequest, NextResponse } from "next/server";
 import { logAuthorizationEvent } from "@/lib/admin/authorization-events";
 import { validateCsrfToken } from "@/lib/foundation/security";
 import { canAccess, getApiAdminContext } from "@/lib/permissions";