Server management from Welcome Screen

[kirich1409]

Epic: Welcome Screen (#139)

Task ID: T-5 · Wave: 3 · Complexity: L

Описание

Поднять ServerListFeature и CloudNavigationFeature на уровень AppFeature как @Presents sheet. Доступны и с Welcome Screen, и с Main.

1. WelcomeFeature: action manageServers → delegate(.manageServersRequested)
2. AppFeature: перехватывает delegate → показывает ServerListFeature sheet
3. Connect local → AppFeature создаёт MainFeature + remote tab
4. Connect cloud → CloudNavigationFeature → выбор project/session → MainFeature
5. Из MainFeature убрать ownership ServerListFeature/CloudNavigationFeature
6. Переработать layout WelcomeView: левая колонка — projects + search, правая — Quick Actions (Open Project, Manage Servers)

Module: MacApp/Relay/AppFeature.swift, MacApp/Relay/MainFeature.swift, MacApp/Relay/Welcome/, MacApp/Relay/ServerManagement/

Acceptance Criteria

• ServerListFeature как @presents в AppFeature (не в MainFeature)
• "Manage Servers" из Welcome → sheet с полным CRUD серверов
• Добавление/редактирование/удаление/тест серверов с Welcome Screen
• Connect to local server → MainFeature + remote tab
• Connect to cloud → CloudNavigationFeature → project/session → MainFeature
• ServerListFeature доступен и из Main (toolbar)
• Layout: две колонки — projects слева, quick actions справа
• Серверы сохраняются между сессиями (через T-0 persistence)

Dependencies

• Server credential persistence (SwiftData + Keychain) #135 (T-0: Server persistence)
• Integrate WelcomeFeature into AppFeature + rewrite WelcomeView #144 (T-3: Integrate WelcomeFeature)