test(client): live atlas generation-overlay inspection scenario (#960)

atlas_gen_open opens the real atlas app via HudGroups, navigates to GJ71c's
regional screen, and enables the Layer-1 overlays — exercising the production
opener + the live request→cascade→render pipeline against a --test-mode server
(SR_LIVE=1). Capture with: tests/run-visual --screenshot atlas_gen_open.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

client/tests/visual_scenarios.gd

@@ -110,6 +110,31 @@ func apply_setup(scenario_name: String, tree_root: Node) -> bool:
 			indicator.position = Vector2(370.0, 240.0)  # centered at 960x540
 			indicator.start("GENERATING LAYER 1")
 
+		"atlas_gen_open":
+			# #960 live inspection: open the actual atlas app through HudGroups (the
+			# production opener), navigate to GJ71c's regional screen, and enable the
+			# generation overlays — exercises the opener + the live request → cascade
+			# → render pipeline against a connected server (SR_LIVE=1).
+			var hud_groups: Node = tree_root.get_node("/root/HudGroups")
+			var registry: Node = tree_root.get_node("/root/ImplantRegistry")
+			hud_groups.open_app("implant/map")
+			var app: Variant = registry.get_app_instance("implant/map")
+			if app == null:
+				push_warning("VisualScenarios: atlas app not instantiated")
+				return true
+			var body := {
+				"body_id": "GJ71c",
+				"proper_name": "Threshold",
+				"terrain_reference": "wiki/star-systems/GJ-71/bodies/GJ71c/heightmap.png",
+			}
+			app.nav.push(
+				"regional", {"body": body, "system": {"system_id": "GJ 71", "proper_name": "GJ 71"}}
+			)
+			var viewer: Variant = app._regional_screen._viewer
+			viewer.set_overlay_visible("gen_l1_rivers", true)
+			viewer.set_overlay_visible("gen_l1_basins", true)
+			viewer.set_overlay_visible("gen_l1_attractors", true)
+
 		_:
 			push_warning("VisualScenarios: unknown scenario '%s'" % scenario_name)
 			return false

tests/visual.json

@@ -72,6 +72,10 @@
     "implant_pending": {
       "ticks": 1,
       "description": "ImplantPending — diegetic Layer-1 generating indicator (#960)"
+    },
+    "atlas_gen_open": {
+      "ticks": 240,
+      "description": "Live: real atlas opener (HudGroups) + GJ71c Layer-1 overlays (#960)"
     }
   },
   "flows": {