feat(feedback): show aura progression

design/log.md

@@ -15,3 +15,4 @@ description: Chronological record of material changes to the Spigot Creeper Fear
 - Added the initial plugin architecture.
 - Completed US-001 with asynchronous SQLite current-tier progress, direct and indirect kill attribution, bounded death deduplication, and automated tests.
 - Completed US-002 with per-tier rank advancement, online aura state, creeper block protection, rank damage multipliers, and rank VI cancellation.
+- Completed US-003 with temporary configurable boss bars, current-tier progress presentation, full-screen rank-up titles, and maximum-rank hiding.

design/user-stories/us-003-show-progression-and-rank-advancement.md

@@ -2,7 +2,7 @@
 type: User Story
 title: "US-003: Show progression and rank advancement"
 description: Give players brief current-tier progress displays and prominent rank-up notifications.
-status: backlog
+status: done
 ---
 
 # US-003: Show progression and rank advancement
@@ -11,15 +11,15 @@ As a **player**, I want visible progress and rank-up notifications so that I und
 
 ## Acceptance criteria
 
-- [ ] After each qualifying creeper kill, a temporary boss bar shows the player's current state and progress toward the next rank.
-- [ ] A locked player sees current-tier progress toward Creeper Aura I.
-- [ ] A ranked player sees their current Roman-numeral rank, current-tier progress, and the next rank requirement.
-- [ ] The display duration is configurable and defaults to a short period measured in seconds.
-- [ ] The boss bar is hidden automatically when its display period expires.
-- [ ] A rank VI player no longer sees a progress boss bar.
-- [ ] Each newly attained rank displays a full-screen title naming the rank.
-- [ ] Joining the server does not replay a previously acknowledged rank-up title.
-- [ ] Administrative changes update an online player's boss bar if it is currently visible.
+- [x] After each qualifying creeper kill, a temporary boss bar shows the player's current state and progress toward the next rank.
+- [x] A locked player sees current-tier progress toward Creeper Aura I.
+- [x] A ranked player sees their current Roman-numeral rank, current-tier progress, and the next rank requirement.
+- [x] The display duration is configurable and defaults to a short period measured in seconds.
+- [x] The boss bar is hidden automatically when its display period expires.
+- [x] A rank VI player no longer sees a progress boss bar.
+- [x] Each newly attained rank displays a full-screen title naming the rank.
+- [x] Joining the server does not replay a previously acknowledged rank-up title.
+- [x] Administrative changes update an online player's boss bar if it is currently visible.
 
 ## Related