Build distinct Joke Shop and TV Studio venues

Add the alley walls, warm lantern, shutters, dumpster, AC clutter and door
step for the Joke Shop. Build the studio stone facade, bulb canopy, glossy
black car, stanchions and barriers. Rebuild only the world container when the
venue changes, so the guard and UI survive; add per-venue navigation checks.
Capture gallery shots 12/13, update the concept mapping and docs. Headless
231/231, Python 87/87, screenshot gate 13 good/0 bad. The vision-judge retry is
tracked separately because the API key is invalid.

src/test/capture_screenshots.gd

@@ -207,6 +207,36 @@ func _advance() -> void:
 				_shoot("11-precision-walk.png")
 				Input.action_release("move_forward")
 				Input.action_release("walk_slow")
+				if gm != null:
+					gm.switch_scenario("joke_shop")
+					gm.coordinator.elapsed_s = 620.0
+				state = 12
+				state_frames = 0
+		12:
+			if state_frames == 1 and gm != null:
+				gm.guard.global_position = Vector3(-1.5, 0.1, 8.5)
+				gm.guard.rotation.y = deg_to_rad(-5.0)
+				gm.guard.head.rotation.x = deg_to_rad(2.0)
+				gm.hud.clear_log()
+				gm.hud.set_escalation(0)
+				gm.hud.set_body_camera(false)
+			if state_frames >= 90:
+				_shoot("12-joke-shop.png")
+				if gm != null:
+					gm.switch_scenario("tv_studio")
+					gm.coordinator.elapsed_s = 620.0
+				state = 13
+				state_frames = 0
+		13:
+			if state_frames == 1 and gm != null:
+				gm.guard.global_position = Vector3(0, 0.1, 14.0)
+				gm.guard.rotation.y = 0.0
+				gm.guard.head.rotation.x = deg_to_rad(2.0)
+				gm.hud.clear_log()
+				gm.hud.set_escalation(0)
+				gm.hud.set_body_camera(false)
+			if state_frames >= 120:
+				_shoot("13-studio-arrival.png")
 				quit(0)
 
 ## Put the guard a couple of steps in front of the target so a staged UI capture