feat(quests): add shared active quest browsing

knowledge/user-stories/us-004-browse-available-quests.md

@@ -2,7 +2,7 @@
 type: User Story
 title: "US-004: Browse available quests"
 description: Let players inspect globally available quests and their essential terms.
-status: backlog
+status: done
 ---
 
 # US-004: Browse available quests
@@ -11,13 +11,13 @@ As a **player**, I want to browse current quests so that I can decide which bloc
 
 ## Acceptance criteria
 
-- [ ] Every registered board lists the same active quests.
-- [ ] Each listing shows the requested block material, quantity, reward, issuer, and time remaining.
-- [ ] Remaining durations are clear and never display an expired quest as active.
-- [ ] Completed, cancelled, and expired quests are excluded from the active listing.
-- [ ] When player commands are enabled, `/quests` and `/quests list` provide the same active quest information in chat.
-- [ ] Listing and autocomplete do not expose stale quest identifiers as completable or cancellable.
-- [ ] Automated tests verify filtering, displayed fields, duration boundaries, and command aliases.
+- [x] Every registered board lists the same active quests.
+- [x] Each listing shows the requested block material, quantity, reward, issuer, and time remaining.
+- [x] Remaining durations are clear and never display an expired quest as active.
+- [x] Completed, cancelled, and expired quests are excluded from the active listing.
+- [x] When player commands are enabled, `/quests` and `/quests list` provide the same active quest information in chat.
+- [x] Listing and autocomplete do not expose stale quest identifiers as completable or cancellable.
+- [x] Automated tests verify filtering, displayed fields, duration boundaries, and command aliases.
 
 ## Related