Every quest opens with a popup
ESVA is idle, so the game cannot require the player to go looking for content. Every quest opens with a popup from its sender. The Archivist speaks to you; you never have to walk up to anyone.
The server fires it
The trigger belongs to the server, once per account, with the mark written to the database. It survives a change of device. The popup button opens the target screen directly: the player never needs to know where that screen lives. Walking is never a requirement — it is flavour.
The rule we locked
If the answer to "if the player does nothing, what brings them here?" is not "the popup", the quest does not ship. There are 46 tutorials, each with a declared trigger. The card explains the mechanic while the popup does the leading.