feat(spaces): корзина, hard purge, transfer и полный backup

Soft-delete/restore/purge пространств, смена владельца, импорт JSON с spaces, proxy portal-users и polish Settings/ConfirmDialog.

Co-authored-by: Cursor <[email protected]>

packages/db/src/test-setup.ts

@@ -8,7 +8,8 @@ CREATE TABLE IF NOT EXISTS spaces (
   slug TEXT NOT NULL,
   kind TEXT NOT NULL DEFAULT 'personal',
   ownerUserId TEXT,
-  createdAt TEXT NOT NULL
+  createdAt TEXT NOT NULL,
+  deletedAt TEXT
 );
 
 CREATE TABLE IF NOT EXISTS space_members (