test(scenes): ✅ Add climate_proof and combat_proof test scenes with scripts and UID files for climate and combat scenario validation

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

src/game/engine/scenes/tests/climate_proof.gd.uid

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+uid://bpjf08mbhnsw

src/game/engine/scenes/tests/combat_proof.gd

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+extends Node2D
+## Phase 8 Combat Proof Scene.
+## Proves: CombatPreview popup displays attacker/defender stats and damage estimates.
+## Sets up a Dwarf Warrior vs Orc Warrior with known D20 stats.
+## Self-capturing: renders the preview popup, saves screenshot, and quits.
+
+const UnitScript: GDScript = preload("res://engine/src/entities/unit.gd")
+const CombatPreviewScene: PackedScene = preload(
+	"res://engine/scenes/combat/combat_preview.tscn"
+)
+
+const OUTPUT_DIR: String = "user://screenshots"
+const CAPTURE_DELAY: float = 1.5
+
+var _attacker: RefCounted = null
+var _defender: RefCounted = null
+var _preview: CanvasLayer = null
+
+
+func _ready() -> void:
+	DataLoader.load_theme("age-of-dwarves")
+	await get_tree().create_timer(0.3).timeout
+	_setup_units()
+	_setup_preview()
+	await get_tree().create_timer(CAPTURE_DELAY).timeout
+	_capture_and_quit()
+
+
+func _setup_units() -> void:
+	_attacker = UnitScript.new()
+	_attacker.id = "proof_atk_1"
+	_attacker.type_id = "warriors"
+	_attacker.owner = 0
+	_attacker.name = "Dwarf Warriors"
+	_attacker.position = Vector2i(5, 5)
+	_attacker.base_str = 14
+	_attacker.base_dex = 10
+	_attacker.base_con = 14
+	_attacker.base_int = 8
+	_attacker.hp = 80
+	_attacker.max_hp = 80
+
+	_defender = UnitScript.new()
+	_defender.id = "proof_def_1"
+	_defender.type_id = "warriors"
+	_defender.owner = 1
+	_defender.name = "Orc Warriors"
+	_defender.position = Vector2i(6, 5)
+	_defender.base_str = 16
+	_defender.base_dex = 8
+	_defender.base_con = 12
+	_defender.base_int = 6
+	_defender.hp = 70
+	_defender.max_hp = 70
+	_defender.fortified_turns = 1
+
+
+func _setup_preview() -> void:
+	_preview = CombatPreviewScene.instantiate()
+	add_child(_preview)
+	await get_tree().process_frame
+	_preview.show_preview(_attacker, _defender, null, [_attacker, _defender])
+
+
+func _capture_and_quit() -> void:
+	DirAccess.make_dir_recursive_absolute(ProjectSettings.globalize_path(OUTPUT_DIR))
+	var image: Image = get_viewport().get_texture().get_image()
+	if image == null:
+		push_error("CombatProof: Failed to get viewport image")
+		get_tree().quit(1)
+		return
+
+	var timestamp: String = Time.get_datetime_string_from_system().replace(
+		":", "-"
+	).replace("T", "_")
+	var rel_path: String = "%s/phase8_proof_%s.png" % [OUTPUT_DIR, timestamp]
+	var abs_path: String = ProjectSettings.globalize_path(rel_path)
+	var err: Error = image.save_png(abs_path)
+
+	if err == OK:
+		print("SCREENSHOT_PATH:%s" % abs_path)
+		print("CombatProof: %dx%d saved to %s" % [
+			image.get_width(), image.get_height(), abs_path
+		])
+	else:
+		push_error("CombatProof: Save failed: %s" % error_string(err))
+
+	get_tree().quit()

src/game/engine/scenes/tests/combat_proof.gd.uid

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+uid://bne8dw3hagjnh

src/game/engine/scenes/tests/combat_proof.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://combat_proof"]
+
+[ext_resource type="Script" path="res://engine/scenes/tests/combat_proof.gd" id="1"]
+
+[node name="CombatProof" type="Node2D"]
+script = ExtResource("1")