feat: share village needs with helpers

docs/ECONOMIC_EVENTS.md

@@ -99,6 +99,14 @@ opening; invalidation emits no event and stores the close tick and stable
 reason. Resolution or invalidation returns the trigger to normal bounded
 retention.
 
+When a performer or direct witness meets another villager at an eligible shared
+activity, the active opportunity's trigger is attempted before normal
+lasting/recent communication ranking. `EventKnowledgeSystem` still requires
+performed/witnessed source provenance and records only the existing event ID,
+speaker ID, source method, listener, and acquisition tick. A newer unrelated
+fact cannot displace the active report, while communicated listeners still
+cannot relay it onward.
+
 For an open need, the same system can derive one capable helper without
 assigning work. A candidate must know the exact trigger and have a familiar
 directed relationship with at least 0.6 trust toward the interested villager.
@@ -148,6 +156,10 @@ world cue remains specific to the pantry shortage rather than representing a
 wood need as hunger. The active summary additionally names the currently
 derived helper, supply action, trust fact, and inventory or finite-source route,
 or states that no informed trusted villager is currently able to supply it.
+One separate cardless player HUD gives transient warm-amber feedback for the
+authoritative need opening, exact named report, newly informed helper decision,
+and real resolution. It stays available when development overlays are hidden,
+but clears on restore and never becomes objective or save state.
 
 ## Deliberate limits