Fix broken template rendering on /search requests (internetarchive#8757)

* Fix broken template rendering on /search requests

Work search template expects a SearchResponse object,
but None was being sent if the request did not have any params.
Updated request to always send a SearchResponse object.

Also, removed an unused import.

openlibrary/plugins/worksearch/code.py

@@ -19,7 +19,6 @@
 from openlibrary.core import cache
 from openlibrary.core.lending import add_availability
 from openlibrary.core.models import Edition
-from openlibrary.plugins.inside.code import fulltext_search
 from openlibrary.plugins.openlibrary.processors import urlsafe
 from openlibrary.plugins.upstream.utils import (
     get_language_name,
@@ -491,11 +490,14 @@ def GET(self):
         page = int(param.get('page', 1))
         sort = param.get('sort', None)
         rows = 20
-        search_response: SearchResponse | None = None
         if param:
             search_response = do_search(
                 param, sort, page, rows=rows, spellcheck_count=3
             )
+        else:
+            search_response = SearchResponse(
+                facet_counts=None, sort='', docs=[], num_found=0, solr_select=''
+            )
         return render.work_search(
             ' '.join(q_list),
             search_response,