feat: add person history and trust reactions

docs/PROJECT_CONTEXT.md

@@ -373,13 +373,13 @@ A small village panel displays:
 - a Tab-cycled NPC inspector with profession, needs, task state, destination,
   decision reason, utility scores, directed familiarity/trust, and the exact
   completed event that last changed trust;
-- the selected NPC's latest known objective fact, resolved from its own
-  persisted knowledge rather than omniscient event history.
+- a compact selected-person history that separates up to four importance-ranked
+  retained memories from the NPC's three latest objective personal actions.
 
 NPC name/profession labels, definition-driven colors and props, carried-food
-visuals, and compact task glyphs make active simulation state readable in the
-world. The F10 cinematic mode hides debug labels while preserving the task
-glyphs.
+visuals, compact task glyphs, and a brief amber blossom on real trust gains make
+active simulation state readable in the world. The F10 cinematic mode hides
+debug labels while preserving task glyphs and transient social reactions.
 
 ## Runtime architecture
 
@@ -416,7 +416,8 @@ Focused `RefCounted` collaborators keep rule ownership visible:
 - `SimulationEventLog` owns deterministic event history and queries;
 - `EventKnowledgeSystem` owns per-NPC known-event references, immutable
   first-acquisition time/provenance, actor/nearby evidence capture, bounded
-  one-hop communication, and deterministic recent-memory retention;
+  one-hop communication, deterministic recent-memory retention, and stable
+  importance ranking for presentation/communication queries;
 - `RelationshipSystem` owns directed relationship state, event-driven trust
   consequences, and deterministic social queries.
 
@@ -432,7 +433,9 @@ than duplicating these responsibilities across additional manager nodes.
 - sends resolved travel destinations to visuals;
 - reports arrival and navigation failure back to `SimulationManager`;
 - synchronizes successful visual movement into authoritative NPC position;
-- applies visual death state.
+- applies visual death state;
+- turns authoritative relationship-change signals into observer-only transient
+  presentation cues without queuing or persisting them.
 
 ### `player/npc/NpcVisual.gd`
 
@@ -443,7 +446,7 @@ than duplicating these responsibilities across additional manager nodes.
 - moves and rotates toward path points;
 - reports arrival;
 - presents definition-driven profession silhouettes, carried resources, task
-  glyphs, walk motion, and death state.
+  glyphs, walk motion, brief trust-gain blossoms, and death state.
 
 ### `player/player.gd` and `player/camera_rig.gd`
 
@@ -593,8 +596,8 @@ These are expected prototype constraints, not necessarily isolated bugs:
   evidence, personalized reinforcement/decay, false beliefs, or multi-hop
   rumours.
 - The reason inspector exposes current decisions, utility rejections, one exact
-  relationship cause, memory counts, and the latest known fact with its speaker
-  and retention class, but a broader person-history view is not yet present.
+  relationship cause, and a compact person-history view that distinguishes
+  importance-ranked retained memories from objective personal actions.
 - Active navigation is used as if all agents are local; no simulation LOD exists.
 - Unloaded traveling NPCs preserve their state but do not yet advance through
   abstract travel time.
@@ -841,8 +844,10 @@ and relationship cause, the inspector names the speaker, and the listener's
 future work can change without duplicating event history. Importance and
 retention now keep current relationship causes lasting, cap other memories,
 and forget routine facts at deterministic daily-sized reviews without deleting
-the objective event. A compact retained-memory/person-history view and visible
-social-reaction cue are the next systems slice.
+the objective event. The selected-person inspector now shows lasting-first
+retained memories beside objective personal history, and real trust changes
+produce a short observer-only amber blossom without altering saved state. The
+next systems slice is one bounded rumour/opportunity proof.
 
 The remaining simulation-garden target still aims for: