perf: harden runtime for weaker hardware

docs/ARCHITECTURE_OVERVIEW.md

@@ -21,6 +21,7 @@ SimulationClock
         -> EventKnowledgeSystem records, ranks, transfers, and retains bounded knowledge
         -> RelationshipSystem applies evidence-gated social consequences
         -> VillageOpportunitySystem projects one known unresolved need
+        -> ConflictSystem advances indexed combatants and authoritative combat outcomes
     -> WorldViewManager presents travel, NPC state, and world-state cues
         -> ActiveWorldAdapter supplies loaded-world positions/capacity
             -> LoadedResourceSpatialIndex bounds finite-anchor discovery
@@ -48,9 +49,13 @@ would otherwise obscure that lifecycle:
 - `simulation/conflict/ConflictSystem.gd` owns combatants (health, weapons,
   factions, hostility), village/tribe faction records, wolf hostility, the
   tribe war motivation decision (desire + victory confidence), raid spawning,
-  deterministic battle resolution, and war consequences. It emits combat and
-  war narrative facts and spawn/death signals that presentation binds to
-  `HostileCombatant` visuals;
+  deterministic battle resolution, and real pantry-backed war consequences.
+  Player commands are revalidated against authoritative life, faction, range,
+  and cooldown state. Player attack readiness advances in unscaled presentation
+  time; NPC battle cooldowns remain deterministic simulation ticks. Transient
+  NPC and sorted-combatant indexes bound stable-ID callbacks without entering
+  saves. It emits combat and war narrative facts
+  and spawn/death signals that presentation binds to `HostileCombatant` visuals;
 - `simulation/events/SimulationEventLog.gd` owns ordered event identity,
   history queries, and rate calculations;
 - `simulation/knowledge/EventKnowledgeSystem.gd` owns per-NPC references to
@@ -82,7 +87,8 @@ would otherwise obscure that lifecycle:
 `world/creatures/creature_visual.gd` is the shared root for creature
 presentation: any `CreatureVisual` follows a simulation-owned position through
 the navigation mesh, reports position changes, and plays a shared death
-collapse. `HostileCombatant` extends it and builds its body from an
+collapse. Failed paths keep their target and use bounded exponential retry
+instead of querying navigation every physics frame. `HostileCombatant` extends it and builds its body from an
 `EnemyDefinition`; `NpcVisual` and `AnimalNode` already follow the same
 follow-the-authoritative-position contract, so future creatures (bears, boars,
 archers) add a definition and a visual hook instead of a new movement system.
@@ -98,6 +104,16 @@ discovery uses their stable IDs and registration lifecycle, never a parent
 path. Decorative siblings without a `ResourceNode` remain outside the index
 and simulation state.
 
+Player resource interaction uses the same radius-bounded loaded-anchor grid.
+HUD proximity probes, the time dial, player status, and day/night environment
+are presentation-only and update at human-readable rates rather than every
+rendered frame. `JajceWorld` exposes reversible High, Balanced, and Low
+presentation profiles with instance-local mutable render resources and owned
+viewport scaling. The default Balanced tier reduces 3D scale, grass, shadow
+coverage, and volumetric work, while Low can stop grass/effects without changing
+simulation state or UI resolution. Forward+-only volumetric fog stays disabled
+under Mobile and Compatibility feature selection, even when High is requested.
+
 Outside the runtime lifecycle, `simulation/benchmark/` owns reusable,
 schema-valid workload fixtures. CLI tools and headless scenarios consume those
 fixtures; production simulation does not depend on benchmark code.