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/layout.js

@@ -2,7 +2,6 @@ import { Inter } from "next/font/google";
 import "material-symbols/outlined.css";
 import "./globals.css";
 import { ThemeProvider } from "@/shared/components/ThemeProvider";
-import "@/lib/initCloudSync"; // Auto-initialize cloud sync
 import "@/lib/network/initOutboundProxy"; // Auto-initialize outbound proxy env
 import { initConsoleLogCapture } from "@/lib/consoleLogBuffer";
 import { RuntimeI18nProvider } from "@/i18n/RuntimeI18nProvider";