Make the @as casts actually apply

emmylua only parses the inline cast as `--[[@as T]]`, the spaced form
`--[[ @as T ]]` is treated as a plain comment, so all 149 of them were
doing nothing.

LuaGuiElement.style is a union because a style name can be assigned to
it, so reading it back needs the cast.

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

exp_gui/module/toolbar.lua

@@ -85,7 +85,7 @@ function Toolbar.set_button_toggled_state(define, player, state, _from_left)
         button.style = state and toolbar_button_active_style or toolbar_button_default_style
 
         -- Make the extra required adjustments
-        local style = button.style
+        local style = button.style --[[@as LuaStyle]]
         style.minimal_width = original_width
         style.maximal_height = original_height
         if button.type == "sprite-button" then

exp_scenario/module/gui/player_list.lua

@@ -55,7 +55,7 @@ Elements.open_action_bar = Gui.define("player_list/open_action_bar")
 --- @param highlighted boolean
 function Elements.open_action_bar.set_highlight(open_button, highlighted)
     open_button.style = highlighted and "tool_button" or "frame_button"
-    local style = open_button.style
+    local style = open_button.style --[[@as LuaStyle]]
     style.padding = -2
     style.width = 8
     style.height = 14

exp_scenario/module/gui/readme.lua

@@ -261,7 +261,8 @@ define_tab(
 
         local rules = Gui.elements.scroll_table(container, scroll_height, 1)
         rules.style = "bordered_table"
-        rules.style.cell_padding = 4
+        local rules_style = rules.style --[[@as LuaStyle]]
+        rules_style.cell_padding = 4
 
         for i = 1, 15 do
             Gui.elements.centered_label(rules, frame_width - 30, { "exp-gui_readme.rules-" .. i })
@@ -287,7 +288,8 @@ define_tab(
 
         local commands = Gui.elements.scroll_table(container, scroll_height, 2)
         commands.style = "bordered_table"
-        commands.style.cell_padding = 0
+        local commands_style = commands.style --[[@as LuaStyle]]
+        commands_style.cell_padding = 0
 
         for name, command in pairs(Commands.list_for_player(player)) do
             Gui.elements.centered_label(commands, 120, name)

exp_scenario/module/gui/science_production.lua

@@ -312,7 +312,8 @@ function Elements.science_table.refresh_row(science_table, row_data)
     -- Update the icon
     local icon = row.icon
     icon.style = row_data.icon_style
-    icon.style.height = 55
+    local icon_style = icon.style --[[@as LuaStyle]]
+    icon_style.height = 55
 
     -- Update the element visibility
     row.net_suffix.visible = true