feat: surface player routes for village needs

docs/ARCHITECTURE_OVERVIEW.md

@@ -48,7 +48,10 @@ would otherwise obscure that lifecycle:
   work wood consumers. It also derives one ephemeral `OpportunityHelperResult`
   from knowledge, directed relationships, inventory, action definitions, and
   finite-resource state without changing resources or assigning tasks. The
-  ordinary action selector consumes that result only for the matching idle NPC;
+  ordinary action selector consumes that result only for the matching idle NPC.
+  When no such helper exists, it can separately derive an ephemeral
+  `OpportunityPlayerResponseResult` from the real destination capacity and
+  enabled player-usable finite sources;
 - `simulation/persistence/` owns save-slot file safety;
 - `simulation/state/` owns versioned serialized record contracts;
 - `simulation/definitions/` owns stable IDs and immutable action/profession
@@ -98,8 +101,9 @@ improving ownership.
   Relationship cues, interested-villager concern, physical pantry stock, and
   refill feedback consume authoritative state or state-change signals and are
   intentionally absent from saves and checksums. The transient village-whisper
-  HUD likewise formats need, transfer, response, and resolution signals without
-  owning them. Stable visuals are rebuilt from state after restore; transient
+  HUD likewise formats need, player route, transfer, response, and resolution
+  signals without owning them. It drops the player route when a capable helper
+  emerges. Stable visuals are rebuilt from state after restore; transient
   reactions are not replayed.
 - Resource changes go through `ResourceStateRecord`, NPC inventory, and
   `VillageEconomy`; `village.food` and `village.wood` are synchronized views.