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/admin-nav.ts

@@ -1,4 +1,3 @@
-import type { LucideIcon } from "lucide-react";
 import {
 	Activity,
 	AlertTriangle,
@@ -19,6 +18,7 @@ import {
 	Languages,
 	LayoutDashboard,
 	ListOrdered,
+	type LucideIcon,
 	Megaphone,
 	Monitor,
 	Newspaper,