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

pnpm-lock.yaml

@@ -164,9 +164,6 @@ importers:
       '@vitest/coverage-v8':
         specifier: 4.1.10
         version: 4.1.10([email protected])
-      babel-plugin-react-compiler:
-        specifier: ^1.0.0
-        version: 1.0.0
       dotenv:
         specifier: ^17.4.2
         version: 17.4.2
@@ -4318,6 +4315,7 @@ snapshots:
   [email protected]:
     dependencies:
       '@babel/types': 7.29.8
+    optional: true
 
   [email protected]: {}