feat: add exact player context actions

docs/PROJECT_CONTEXT.md

@@ -228,6 +228,10 @@ plugin content, not game architecture.
 - Pressing `E` near a berry bush or tree extracts its configured yield into the
   village through the same `ResourceNode` contract used by NPCs.
 - Guard, study, rest, and food interactions now use typed world sites.
+- A cardless bottom-center `E` prompt derives the exact current animal,
+  resource, storage, or activity target and its availability. Named goat care
+  reports pantry cost plus transient success or blockage, remains in cinematic
+  mode, and never enters saved state.
 - `Escape` releases captured mouse input.
 
 ### Village simulation
@@ -478,16 +482,19 @@ than duplicating these responsibilities across additional manager nodes.
 
 These implement camera-relative character movement, physical interaction
 proximity checks, ResourceNode harvesting, mouse capture, and the elevated
-follow camera.
+follow camera. `PlayerInteractionResult` is the ephemeral boundary shared by
+the current `E` prompt and execution, so UI copy names the exact stable target
+that receives the command.
 
 ### `world/ui/ui.gd`
 
 The UI subscribes to village, task, event, knowledge, relationship, and
 opportunity changes. It formats aggregate state and resolves known facts,
 relationship causes, and opportunity lifecycle details through manager queries
-without owning or recomputing simulation facts. `village_whisper_hud.gd` is a
-separate transient player layer that formats the same authoritative signals and
-remains independent of the development overlays.
+without owning or recomputing simulation facts. `village_whisper_hud.gd` and
+`player_interaction_hud.gd` are separate transient player layers that format
+authoritative signals or the current exact context and remain independent of
+the development overlays.
 
 ## Current runtime flow
 
@@ -1005,8 +1012,10 @@ Dunja's pasture, nearest loaded care targeting supports two simultaneous exact
 claims, and feeding one goat cannot mutate the other. World-schema v11
 preserves both claim pairings without serializing shelter ownership. Do not
 generalize animal discovery or introduce herd scheduling, products, breeding,
-or active/abstract animal LOD until playtest or measurement exposes a concrete
-need.
+or active/abstract animal LOD. The named-pair gate instead produced one
+Milestone 9 context-action result shared by prompt and execution, with exact
+pantry feedback and no persistent UI state. The next animal-facing proof should
+make NPC care visibly carry one real pantry food to its exact reserved goat.
 
 The remaining simulation-garden target still aims for: