systems rework: buffs, prestige graph, research, modular architecture

Decouples core systems from centralized globals in favor of catalogue-based architecture and data-driven content.

   Key changes:
   - Prestige: node-based buff tech tree, graph panel, progress bar
   - Research: multi-worker system, per-generator research, xp generation
   - Ascension: meta-currency layer via multi-currency prestige resets
   - Buffs: refactored as generator-independent via catalogues
   - UI: currency panel, edge-scrolling camera + zoom, current-goal panel
   - Alchemy Tower: crafting building with recipe/cost system
   - Testing: 7 test suites (ascension, prestige, research, goals)
   - Content: migrated from hardcoded idles/ to gym format (tiny_sword)

tests/test_research_prestige_reset.gd

@@ -0,0 +1,128 @@
+extends SceneTree
+
+var passed: int = 0
+var failed: int = 0
+var _game_root: Node = null
+var _test_complete: bool = false
+
+func _init():
+	print("\n=== TEST: Research Level and XP Reset After Prestige ===\n")
+	TestUtils.set_test_name("research_prestige_reset")
+	
+	var scene = load("res://docs/gyms/tiny_sword/tiny_sword.tscn")
+	change_scene_to_packed(scene)
+	
+	await _wait()
+	
+	_game_root = root.get_child(0)
+	
+	var game_state: LevelGameState = _game_root.find_child("LevelGameState")
+	var prestige_manager = _game_root.find_child("PrestigeManager") as PrestigeManager
+	
+	if game_state == null:
+		print("[ERROR] LevelGameState not found")
+		_print_summary()
+		_test_complete = true
+		quit(1)
+		return
+	
+	if prestige_manager == null:
+		print("[ERROR] PrestigeManager not found")
+		_print_summary()
+		_test_complete = true
+		quit(1)
+		return
+	
+	var research_id: StringName = &"gold_research"
+	
+	var initial_xp: BigNumber = game_state.get_research_xp(research_id)
+	var initial_level: int = game_state.get_research_level(research_id)
+	print("[TARGET] initial_research_xp: mantissa=%s, exponent=%s" % [initial_xp.mantissa, initial_xp.exponent])
+	print("[TARGET] initial_research_level: %d" % initial_level)
+	
+	TestUtils.assert_equals(
+		0,
+		initial_xp.mantissa,
+		"Initial research XP should be 0"
+	)
+	
+	TestUtils.assert_equals(
+		0,
+		initial_level,
+		"Initial research level should be 0"
+	)
+	
+	game_state.add_currency_by_id(&"gold", BigNumber.from_float(100000.0))
+	game_state.add_currency_by_id(&"gems", BigNumber.from_float(100.0))
+	
+	await _wait()
+	
+	for i in range(10):
+		game_state.add_research_xp(research_id, BigNumber.from_float(500.0))
+		await _wait(0.05)
+	
+	var pre_prestige_xp: BigNumber = game_state.get_research_xp(research_id)
+	var pre_prestige_level: int = game_state.get_research_level(research_id)
+	print("[TARGET] pre_prestige_research_xp: mantissa=%s, exponent=%s" % [pre_prestige_xp.mantissa, pre_prestige_xp.exponent])
+	print("[TARGET] pre_prestige_research_level: %d" % pre_prestige_level)
+	
+	TestUtils.assert_true(
+		pre_prestige_xp.mantissa > 0,
+		"Research XP should be > 0 before prestige"
+	)
+	
+	TestUtils.assert_true(
+		pre_prestige_level > 0,
+		"Research level should be > 0 before prestige"
+	)
+	
+	var can_prestige: bool = prestige_manager.can_prestige()
+	print("[TARGET] can_prestige: %s" % str(can_prestige))
+	
+	TestUtils.assert_true(
+		can_prestige,
+		"Should be able to prestige after accumulating currencies"
+	)
+	
+	if can_prestige:
+		prestige_manager.perform_prestige()
+		
+		await _wait()
+	
+	var post_prestige_xp: BigNumber = game_state.get_research_xp(research_id)
+	var post_prestige_level: int = game_state.get_research_level(research_id)
+	print("[TARGET] post_prestige_research_xp: mantissa=%s, exponent=%s" % [post_prestige_xp.mantissa, post_prestige_xp.exponent])
+	print("[TARGET] post_prestige_research_level: %d" % post_prestige_level)
+	
+	TestUtils.assert_equals(
+		0,
+		post_prestige_xp.mantissa,
+		"Research XP should be reset to 0 after prestige"
+	)
+	
+	TestUtils.assert_equals(
+		0,
+		post_prestige_level,
+		"Research level should be reset to 0 after prestige"
+	)
+	
+	_print_summary()
+	_test_complete = true
+	if failed == 0:
+		quit(0)
+	else:
+		quit(1)
+
+func _wait(seconds: float = 0.1) -> void:
+	await create_timer(seconds).timeout
+
+func _print_summary():
+	TestUtils.print_result()
+	passed = TestUtils.get_passed()
+	failed = TestUtils.get_failed()
+
+func get_passed() -> int:
+	return passed
+
+func get_failed() -> int:
+	return failed