Added the Crucible: a weekly run for 3 to 10 guildmates, started by a Vice-Leader from the new Circle tab in the guild window
Added the guild project behind it: members deposit materials and Guardian Relics (dropped by the floor guardians) into a shared stockpile, then Vice-Leaders spend it to seal each echo into the run
Added the first two echo fights: the echo of Embermech tests your tank, the echo of Dune-sworn God tests your healers; the other echoes are stand-ins for now
Added a briefing card before every echo, an enrage bar on the boss bar, and a 3-2-1 before the fight starts