chore: ignore local artifacts and remove dead api key trend impl

.gitignore

@@ -85,6 +85,11 @@ temp/
 .cache/
 .dev/
 .serena/
+.omc/
+.workbuddy/
+backend/.omc/
+frontend/.omc/
+backend/cmd/server/.omc/
 
 # ===================
 # 构建产物
@@ -134,4 +139,18 @@ docs/*
 frontend/coverage/
 aicodex
 output/
+backend/dump.rdb
+test-reports/
+config_final*.txt
+config_test_output.txt
+config_test_result*.txt
+handler_final*.txt
+handler_test*.txt
+mid_test.txt
+middleware_test.txt
+new_domain_tests.txt
+setup_test.txt
+test_build_errors.txt
+test_config_results.txt
+backend/test_*.txt