rename gauntlet→candy_survival + rewrite Candy Survival per boss design

- Rename enum GAUNTLET→CANDY_SURVIVAL, all gauntlet_*→candy_survival_*
- Rename files: gauntlet_manager→candy_survival_manager, candy_cannon→candy_survival_npc, gauntlet.tscn→candy_survival.tscn
- Rewrite candy_survival_manager.gd: blueprints, candy stack, Mekton delivery, Sugar Rush, knock/ghost charges, sticky-as-wall
- Update player_movement_manager.gd: smack→knock system, ghost integration
- All Candy Survival issues (#54-57, #65-70) retitled per boss design
- Shared managers (goals_cycle, goal, player_race, playerboard, turn) untouched

tests/test_gauntlet_floor_highlight.gd

@@ -1,13 +1,13 @@
 extends GutTest
 
 # =============================================================================
-# Test: Gauntlet Telegraph Floor Highlight [Gauntlet #081]
+# Test: Candy Survival Telegraph Floor Highlight Candy Survival #081]
 # Verifies the amber floor overlay placed under cells during the 1-second
 # telegraph window: amber color, two-stage alpha (build-up → flash), lifetime
 # bound to telegraph_duration, distinct from sticky pink, RPC broadcast.
 # =============================================================================
 
-const GauntletManager = preload("res://scripts/managers/gauntlet_manager.gd")
+const CandySurvivalManager = preload("res://scripts/managers/candy_survival_manager.gd")
 const GridMapMock = preload("res://tests/helpers/gridmap_mock.gd")
 
 var main_mock: Node
@@ -15,7 +15,7 @@ var gridmap_mock: Node
 var manager: Node
 
 func before_all():
-	gut.p("=== Feature Tests [Gauntlet #081 Telegraph Floor Highlight] ===")
+	gut.p("=== Feature Tests Candy Survival #081 Telegraph Floor Highlight] ===")
 
 func before_each():
 	main_mock = Node.new()
@@ -26,7 +26,7 @@ func before_each():
 	gridmap_mock.name = "EnhancedGridMap"
 	main_mock.add_child(gridmap_mock)
 
-	manager = GauntletManager.new()
+	manager = CandySurvivalManager.new()
 	main_mock.add_child(manager)
 	manager.initialize(main_mock, gridmap_mock)
 
@@ -63,7 +63,7 @@ func test_telegraph_apply_converts_to_sticky():
 	# Verify the tile ID conversion by inspecting state directly — invoking
 	# sync_growth_apply triggers _check_all_players_trapped which needs an
 	# active multiplayer peer. The conversion is exercised by the
-	# test_gauntlet_growth_tick.gd suite; here we only confirm the
+	# test_candy_survival_growth_tick.gd suite; here we only confirm the
 	# sticky tile ID is reserved and distinct.
 	_without_peer(func():
 		manager.sync_growth_telegraph([Vector2i(7, 7)])