Initial commit: SpaceshipTest, a top-down space RTS in Godot 4.7.1

A fleet of neon-outlined ships explores a procedurally generated, seeded
infinite world: tap/joystick steering, pinch zoom, formation pivoting,
planet landings, an ore economy with extractors and haulers, and player
built structures (mothership, ship crafter, command centre).

All art is hand-drawn with draw_* calls rather than textures, and the
backgrounds are camera-relative shaders so they stay precise at large
world coordinates.

Includes a 35-test headless suite (tests/run_tests.sh) plus screenshot
tooling that renders real frames through Xvfb and Mesa softpipe, since
--headless has no GPU.

Excluded from version control: .godot/ (import cache, and it holds
export credentials), builds/, android/build/ and packaged APKs - all
regenerable, and ~325 MB combined.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/test_exploration_tracker.gd

@@ -0,0 +1,59 @@
+extends SceneTree
+
+# Headless gameplay test: run with
+#   godot --headless -s res://tests/test_exploration_tracker.gd
+# Verifies ExplorationTracker marks the fleet's current chunk as explored
+# once the fleet is there, while a distant chunk the fleet never visited
+# stays unexplored - this is what lets the world map reveal only chunks
+# actually seen instead of the whole generated world at once.
+
+var main_scene: Node
+var fleet: Node
+var tracker: Node
+var elapsed: float = 0.0
+var teleported: bool = false
+
+
+func _initialize() -> void:
+	var packed: PackedScene = load("res://Main.tscn")
+	main_scene = packed.instantiate()
+	root.add_child(main_scene)
+	fleet = main_scene.get_node("Fleet")
+	tracker = main_scene.get_node("ExplorationTracker")
+
+
+func _process(delta: float) -> bool:
+	if not teleported:
+		# Wait one tick so Fleet._ready() has run and fleet.ships is
+		# populated before we try to teleport them - reposition attempted
+		# synchronously in _initialize() would silently no-op on an empty
+		# ships array.
+		var target_pos: Vector2 = Vector2(5000, -3000)
+		for ship in fleet.ships:
+			ship.position = target_pos
+		fleet.move_to(target_pos)
+		teleported = true
+		return false
+
+	elapsed += delta
+	if elapsed < 0.2:
+		return false
+
+	var visited_chunk: Vector2i = WorldGen.chunk_coords(Vector2(5000, -3000))
+	var far_chunk: Vector2i = Vector2i(9999, 9999)
+
+	var explored: Array = tracker.get_explored_chunks()
+	var visited_ok: bool = explored.has(visited_chunk)
+	var far_unexplored: bool = not explored.has(far_chunk)
+
+	print("visited_chunk=%s in_explored=%s far_chunk=%s in_explored=%s" % [
+		visited_chunk, visited_ok, far_chunk, not far_unexplored
+	])
+
+	if visited_ok and far_unexplored:
+		print("TEST_EXPLORATION_TRACKER: PASS")
+		quit(0)
+	else:
+		print("TEST_EXPLORATION_TRACKER: FAIL")
+		quit(1)
+	return true