chore: add buildOutput RTK filter, drop legacy cloud sync, internal cleanup

- feat(rtk): buildOutput filter + autodetect for npm/yarn/cargo logs
- chore: remove unused cloud sync module and related routes
- ui: hide deprecated providers (qwen, iflow, antigravity)
- chore: minor tray/cli/internal adjustments

src/app/api/v1/chat/completions/route.js

@@ -1,4 +1,3 @@
-import { callCloudWithMachineId } from "@/shared/utils/cloud.js";
 import { handleChat } from "@/sse/handlers/chat.js";
 import { initTranslators } from "open-sse/translator/index.js";