Share one backdrop between game and editor, and fix three input/economy bugs

The setup editor and the landed surface drew different backgrounds for the
same planet. Each scene carried its own hand-written ShaderMaterial, and only
the game side ever swapped in a profile's shader, so a gas giant authored in
the editor showed recoloured craters while the game showed cloud bands. Both
now instance one SurfaceBackground.tscn and configure it through one method,
and every profile names its own shader - the old "null means keep whatever
the scene already had" convention was the drift, since each scene "already
had" something different. The shared material is resource_local_to_scene, or
two live surfaces would repaint each other.

The gas giant's bands broke into disjoint segments once per cell: the second
turbulence octave doubled only the INTEGER half of a lattice coordinate,
which is a different point in every cell rather than the same point at twice
the frequency. Measured, the old form steps 0.153 at a cell boundary against
0.0002 now. A second discontinuity went with it - the camera cell index
arrives pre-wrapped, so hashing it raw rearranged the whole sky every 32
cells; hashes are now wrapped per octave and the field is exactly periodic.
Bands also gained low-frequency octaves and per-row differential drift.

WorldMap swallowed every touch in _input(), which runs before the GUI system,
so CloseButton never saw one: the map could be opened and not closed. Android
and desktop hid it behind Godot's emulated mouse event, which this never
swallowed; a phone browser gives no such second chance. Its test had been
closing the map by calling the method the button was failing to reach.

Construction now draws on the fleet hold as well as the bank. With an empty
starting bank and ore bankable only at a mothership, charging construction to
the bank alone made the first mothership cost ore that could not yet exist.

Also: a conquered planet no longer re-spawns its garrison (guarded on having
capture points, since a setup with none registers as vacuously conquered);
planets keep the map they drew, with the candidate list sorted rather than
left in filesystem order and assignments pruned rather than cleared on
rescan; and the map editor lists setups at a tappable size and can delete
one, as an explicit armed mode rather than a tap away from destroying work.

Full suite 106/106.

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

tests/test_surface_background_shared.gd

@@ -0,0 +1,134 @@
+extends SceneTree
+
+# Headless test: run with
+#   godot --headless -s res://tests/test_surface_background_shared.gd
+# The landed surface and the setup editor drew DIFFERENT backgrounds for the
+# same planet. Each scene carried its own hand-written ShaderMaterial (the
+# game's baked-and-tiled lunar shader, the editor's per-pixel procedural one)
+# and only the game's side ever swapped in a profile's own shader - so a gas
+# giant authored in the editor showed recoloured craters while the game showed
+# cloud bands. An editor that lies about what the player will see is worse
+# than no preview.
+#
+# Both scenes now instance ONE SurfaceBackground.tscn and configure it through
+# ONE method. This test guards that, since nothing about the code stops
+# someone re-adding a local material to one scene and pulling them apart
+# again.
+#
+# Covers:
+#   A. both scenes get their backdrop from the same PackedScene file
+#   B. neither overrides the shared material - the two start out identical
+#   C. every surface profile names its own background_shader; a null one
+#      would mean "whatever this scene already had", which is the ambiguity
+#      that caused the drift
+#   D. applying each profile through the shared entry point produces the same
+#      shader AND the same colours on both scenes, for every profile
+
+const BACKGROUND_SCENE_PATH := "res://SurfaceBackground.tscn"
+const HOST_SCENES := {
+	"PlanetSurface.tscn": "res://PlanetSurface.tscn",
+	"PlanetSetupEditor.tscn": "res://PlanetSetupEditor.tscn",
+}
+const COLOR_PARAMETERS := ["base_color", "crater_color", "highlight_color"]
+
+var backgrounds: Dictionary = {}
+var hosts: Array = []
+
+
+func _initialize() -> void:
+	var surface_profiles: Script = load("res://PlanetSurfaceProfiles.gd")
+
+	# --- A/B: same source scene, same untouched material ---------------------
+	for scene_name in HOST_SCENES:
+		var host: Node = load(HOST_SCENES[scene_name]).instantiate()
+		hosts.append(host)
+		var layer: Node = host.get_node_or_null("BackgroundLayer")
+		if layer == null:
+			_fail("%s has no BackgroundLayer" % scene_name)
+			return
+		if layer.scene_file_path != BACKGROUND_SCENE_PATH:
+			_fail("%s builds its own background (%s) instead of instancing %s" \
+				% [scene_name, layer.scene_file_path, BACKGROUND_SCENE_PATH])
+			return
+		var background: Node = layer.get_node_or_null("Background")
+		if background == null:
+			_fail("%s's background layer has no Background node" % scene_name)
+			return
+		if not background.has_method("apply_profile"):
+			_fail("%s's background has no apply_profile() - the shared entry point is gone" % scene_name)
+			return
+		backgrounds[scene_name] = background
+	print("both scenes instance %s and expose apply_profile()" % BACKGROUND_SCENE_PATH)
+
+	var names: Array = backgrounds.keys()
+	var reference: ShaderMaterial = backgrounds[names[0]].material
+	for i in range(1, names.size()):
+		var other: ShaderMaterial = backgrounds[names[i]].material
+		# Same configuration, SEPARATE objects. Sub-resources in a PackedScene
+		# are shared between instances by default, which would make the whole
+		# comparison below vacuous - it would be reading one material twice -
+		# and would mean two live surfaces repainting each other, baked
+		# texture included. SurfaceBackground.tscn marks the material
+		# resource_local_to_scene for exactly this reason.
+		if other == reference:
+			_fail("%s and %s share one ShaderMaterial object, so applying a profile to either repaints both" \
+				% [names[0], names[i]])
+			return
+		if other.shader != reference.shader:
+			_fail("%s and %s start on different shaders (%s vs %s), so one of them overrides the shared material" \
+				% [names[0], names[i], reference.shader.resource_path, other.shader.resource_path])
+			return
+	print("both start on the same shader: %s" % reference.shader.resource_path)
+
+	# --- C: no profile leaves its shader unstated ----------------------------
+	for profile_id in surface_profiles.PROFILES:
+		var profile: Resource = surface_profiles.get_profile(profile_id)
+		if profile.background_shader == null:
+			_fail("the '%s' profile does not name a background_shader, so what it draws depends on which scene happens to be hosting it" % profile_id)
+			return
+	print("all %d profiles name their own background shader" % surface_profiles.PROFILES.size())
+
+	# --- D: applying a profile lands identically on both ---------------------
+	for profile_id in surface_profiles.PROFILES:
+		var profile: Resource = surface_profiles.get_profile(profile_id)
+		for scene_name in backgrounds:
+			backgrounds[scene_name].apply_profile(profile)
+
+		var first: ShaderMaterial = backgrounds[names[0]].material
+		if first.shader != profile.background_shader:
+			_fail("applying '%s' did not put its own shader on the background" % profile_id)
+			return
+		for i in range(1, names.size()):
+			var other: ShaderMaterial = backgrounds[names[i]].material
+			if other.shader != first.shader:
+				_fail("'%s' resolved to %s in %s but %s in %s" \
+					% [profile_id, first.shader.resource_path, names[0],
+						other.shader.resource_path, names[i]])
+				return
+			for parameter in COLOR_PARAMETERS:
+				var a: Color = first.get_shader_parameter(parameter)
+				var b: Color = other.get_shader_parameter(parameter)
+				if not a.is_equal_approx(b):
+					_fail("'%s' set %s to %s in %s but %s in %s" \
+						% [profile_id, parameter, a, names[0], b, names[i]])
+					return
+		# Identical to each other is only half of it - both have to match the
+		# profile, or the shared path could be uniformly ignoring it.
+		for parameter in COLOR_PARAMETERS:
+			var applied: Color = first.get_shader_parameter(parameter)
+			var declared: Color = profile.get(parameter)
+			if not applied.is_equal_approx(declared):
+				_fail("'%s' declares %s %s but the background ended up with %s" \
+					% [profile_id, parameter, declared, applied])
+				return
+		print("  '%s' -> %s, identical on both" % [profile_id, first.shader.resource_path.get_file()])
+
+	for host in hosts:
+		host.free()
+	print("TEST_SURFACE_BACKGROUND_SHARED: PASS")
+	quit(0)
+
+
+func _fail(message: String) -> void:
+	print("TEST_SURFACE_BACKGROUND_SHARED: FAIL (%s)" % message)
+	quit(1)