Restore macOS direct LAN connections (#3071)

* fix(desktop): restore direct LAN connections

Desktop 0.3.0 routed remote WebSockets through the Electron main process, causing previously working macOS LAN connections to fail with EHOSTUNREACH. Revert custom direct headers and restore the renderer WebSocket path used before the regression.

* fix(app): replace host connections by identity

Keep one connection per stable ID when TLS or password settings change. This preserves the current-main upsert invariant while the custom-header rollback removes the unrelated transport feature.

packages/app/src/i18n/resources/ko.ts

@@ -1436,19 +1436,6 @@ export const ko: TranslationResources = {
         show: "고급 표시",
         hide: "고급 숨기기",
       },
-      headers: {
-        title: "사용자 지정 헤더",
-        add: "헤더 추가",
-        name: "이름",
-        value: "값",
-        remove: "헤더 삭제",
-        errors: {
-          missingName: "각 헤더의 이름을 입력하세요",
-          invalidName: "{{name}}은(는) 올바른 헤더 이름이 아닙니다",
-          invalidValue: "{{name}}에 잘못된 줄바꿈이 있습니다",
-          duplicateName: "{{name}}이(가) 두 번 이상 입력되었습니다",
-        },
-      },
       passwordVisibility: {
         show: "비밀번호 표시",
         hide: "비밀번호 숨기기",