Narrow the gui player lookups

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

exp_gui/module/control.lua

@@ -46,8 +46,10 @@ end
 --- @return LuaPlayer
 function Gui.get_player(input)
     if type(input) == "table" and not input.player_index then
+        --- @cast input { element: LuaGuiElement }
         return assert(game.get_player(input.element.player_index))
     end
+    --- @cast input LuaGuiElement | { player_index: uint }
     return assert(game.get_player(input.player_index))
 end
 
@@ -114,7 +116,7 @@ end
 --- @param player LuaPlayer
 --- @return LuaGuiElement
 function Gui.get_top_element(define, player)
-    return assert(player_elements[player.index].top[define.name], "Element is not on the top flow")
+    return assert(assert(player_elements[player.index]).top[define.name], "Element is not on the top flow")
 end
 
 --- Register a element define to be drawn to the left flow on join
@@ -122,7 +124,7 @@ end
 --- @param player LuaPlayer
 --- @return LuaGuiElement
 function Gui.get_left_element(define, player)
-    return assert(player_elements[player.index].left[define.name], "Element is not on the left flow")
+    return assert(assert(player_elements[player.index]).left[define.name], "Element is not on the left flow")
 end
 
 --- Register a element define to be drawn to the relative flow on join
@@ -130,7 +132,7 @@ end
 --- @param player LuaPlayer
 --- @return LuaGuiElement
 function Gui.get_relative_element(define, player)
-    return assert(player_elements[player.index].relative[define.name], "Element is not on the relative flow")
+    return assert(assert(player_elements[player.index]).relative[define.name], "Element is not on the relative flow")
 end
 
 --- Ensure all the correct elements are visible and exist

exp_gui/module/data.lua

@@ -172,7 +172,7 @@ local function on_object_destroyed(event)
     for _, scope in pairs(registered_scopes) do
         local data = scope._raw.element_data
         local player_elements = data and data[player_index]
-        if player_elements then
+        if data and player_elements then
             player_elements[element_index] = nil
             if not next(player_elements) then
                 data[player_index] = nil