Extract OutboundsTab's pieces: outbounds-tab-types.ts (OutboundRow),
outbounds-tab-helpers.ts (address/untestable/security/breakdown +
traffic/testing/result accessors), useOutboundColumns.tsx (desktop table
columns hook) and OutboundCardList.tsx (mobile card view). OutboundsTab
stays the orchestrator for outbound state, mutate, reorder and the
toolbar, and drops from 516 to 238 lines. No behavior change.
This completes plan section 2.4.5 — all four oversized Xray tabs
(Basics/Routing/Dns/Outbounds) are now broken into sections + hooks.
