feat(art): add storybook meadow and woodland villagers

docs/FEATURE_PRESENTATION_PERFORMANCE.md

@@ -51,6 +51,25 @@ selection never forces unsupported volumetric fog on.
 
 ## Runtime hot paths already bounded
 
+The woodland storybook art pass adds portable Blender animal meshes and an
+opaque 35-triangle, seven-blade grass tuft. The existing camera-local grass
+field and quality controls own its instance budget; four loaded path strips
+provide disposable grass-clearance data after material isolation. Animal
+appearance is derived from stable NPC IDs, shares mesh resources, and retains
+profession tint, velocity-driven motion, inventory cues and death through the
+existing presentation controllers. No saved state or navigation changes.
+
+Characters and buildings use soft cel bands; tree crowns retain the shared
+breeze with painted color patches. A static procedural cloud sky, cooler
+ambient fill and warm sunlight follow the simulation day/night clock. The
+cloud shader adds no volumetric pass, outline pass or screen-space postprocess.
+See [the asset contract and rebuild commands](../assets/storybook/README.md).
+
+`docs/baselines/storybook_*.png` records the native Metal review. The accompanying
+`storybook_render_metrics.json` records a bounded local 1600×900 static-camera
+sample on Apple M1 Max with six NPCs and High/Balanced/Low settings. Wall-frame
+latency includes vsync and does not close the weak-PC evidence gap below.
+
 - Player interaction and villager inspection probes are throttled/event-driven;
   they no longer rebuild all candidate data every rendered frame.
 - `LoadedResourceSpatialIndex` bounds finite-resource discovery.

docs/baselines/storybook_render_metrics.json

@@ -0,0 +1,34 @@
+{
+	"renderer": "metal",
+	"resolution": "1600x900",
+	"samples": [
+		{
+			"active_npcs": 6,
+			"draw_calls": 702.0,
+			"frame_wall_p50_ms": 16.646,
+			"frame_wall_p95_ms": 16.903,
+			"objects": 1114.0,
+			"primitives": 684656.0,
+			"profile": "high"
+		},
+		{
+			"active_npcs": 6,
+			"draw_calls": 613.0,
+			"frame_wall_p50_ms": 16.665,
+			"frame_wall_p95_ms": 16.93,
+			"objects": 1031.0,
+			"primitives": 486192.0,
+			"profile": "balanced"
+		},
+		{
+			"active_npcs": 6,
+			"draw_calls": 592.0,
+			"frame_wall_p50_ms": 16.659,
+			"frame_wall_p95_ms": 16.989,
+			"objects": 999.0,
+			"primitives": 377596.0,
+			"profile": "low"
+		}
+	],
+	"workload": "Paused static valley; wall-frame latency includes vsync, not isolated GPU time"
+}