fix(sim): restore reaction + percept verbosity in sim display

The foundations/reaction work introduced five new observable surfaces
but none fed into the sim_logger display system. Two were regressions:

1. ReactionBus events were invisible — the old route_pain_percept
   called sim_pain() but Phase 2a deleted that code path without
   replacing the display hook. Now PainBus.__init__ wires a
   subscribe_all on its ReactionBus that calls a new sim_reaction()
   function. All reaction kinds (pain, fear, hunger, etc.) show in
   --display bio automatically.

2. Percept factories bypassed sim_percept — the Phase 4 factories
   (make_text_percept, make_scene_percept, make_intero_percept)
   became the canonical Percept construction path but didn't log.
   Now each factory calls _log_percept() which best-effort invokes
   sim_percept(). No-op outside simulation context.

Three files, 36 LOC:
- sim_logger.py: new sim_reaction(kind, intensity, source) at BIO tier
- percept_factory.py: _log_percept helper + calls in all 3 factories
- pain_bus.py: _sim_log_reaction subscriber + wiring in PainBus init

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: dennys246

src/maxim/agents/percept_factory.py

@@ -21,6 +21,16 @@
 from maxim.agents.percept_context import PerceptContext
 
 
+def _log_percept(source: str, content: str | None, modality: str) -> None:
+    """Best-effort sim_percept call. No-op outside simulation context."""
+    try:
+        from maxim.simulation.sim_logger import sim_percept
+
+        sim_percept(source, (content or "")[:80], modality=modality)
+    except Exception:
+        pass
+
+
 def make_text_percept(
     text: str,
     *,
@@ -49,6 +59,7 @@ def make_text_percept(
     )
     if sensory is None:
         sensory = SensoryTag(modality=SensoryModality.NARRATIVE)
+    _log_percept(source, text, "text")
     return Percept(
         timestamp=ts,
         source=source,
@@ -79,6 +90,7 @@ def make_scene_percept(
     )
     if sensory is None:
         sensory = SensoryTag(modality=SensoryModality.NARRATIVE)
+    _log_percept("narrative", scene_text, "text")
     return Percept(
         timestamp=ts,
         source="narrative",
@@ -111,6 +123,7 @@ def make_intero_percept(
     )
     if sensory is None:
         sensory = SensoryTag(modality=SensoryModality.INTEROCEPTION)
+    _log_percept(source, content, "intero")
     return Percept(
         timestamp=ts,
         source=source,

src/maxim/proprioception/pain_bus.py

@@ -26,6 +26,16 @@
 logger = logging.getLogger(__name__)
 
 
+def _sim_log_reaction(reaction: "Reaction") -> None:
+    """Best-effort sim_reaction call for the simulation display."""
+    try:
+        from maxim.simulation.sim_logger import sim_reaction
+
+        sim_reaction(reaction.kind, reaction.intensity, reaction.source)
+    except Exception:
+        pass
+
+
 class PainBus:
     """Backward-compatible wrapper around ReactionBus.
 
@@ -39,6 +49,10 @@ def __init__(self, history_size: int = 200) -> None:
             history_size=history_size,
             refractory_overrides={"pain": 0.5},
         )
+        # Wire sim_logger so the simulation display shows reaction events.
+        # Replaces the sim_pain() call lost when route_pain_percept was
+        # deleted in Phase 2a.
+        self.reaction_bus.subscribe_all(_sim_log_reaction)
 
     def subscribe(self, callback: Callable[[PainSignal], None]) -> None:
         def _adapter(reaction: "Reaction") -> None:

src/maxim/simulation/sim_logger.py

@@ -517,6 +517,15 @@ def sim_debug(subsystem: str, action: str, **kwargs: Any) -> None:
     sim_log(subsystem, action, kwargs if kwargs else None, _force_debug=True)
 
 
+def sim_reaction(kind: str, intensity: float, source: str, **kwargs: Any) -> None:
+    """Log a Reaction from the ReactionBus.
+
+    Generalizes sim_pain for all reaction kinds. Replaces the sim_pain
+    call lost when route_pain_percept was deleted in Phase 2a.
+    """
+    sim_log("REACTION", f"{kind} (intensity={intensity:.2f}) from {source}", kwargs if kwargs else None)
+
+
 def sim_pain(pain_type: str, intensity: float, **kwargs: Any) -> None:
     """Log a pain signal."""
     sim_log("PAIN", f"{pain_type} (intensity={intensity:.2f})", kwargs if kwargs else None)