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/dashboardGuard.js

@@ -68,8 +68,16 @@ const PROTECTED_API_PATHS = [
 // Routes that spawn child processes or read host secrets — restrict to localhost.
 const LOCAL_ONLY_PATHS = [
   "/api/cli-tools/cowork-settings",
+  "/api/cli-tools/antigravity-mitm",
   "/api/mcp/",
   "/api/tunnel/tailscale-install",
+  "/api/tunnel/tailscale-enable",
+  "/api/tunnel/tailscale-disable",
+  "/api/tunnel/tailscale-login",
+  "/api/tunnel/tailscale-start-daemon",
+  "/api/tunnel/tailscale-check",
+  "/api/tunnel/enable",
+  "/api/tunnel/disable",
   "/api/oauth/cursor/auto-import",
   "/api/oauth/kiro/auto-import",
 ];