Correct partial table types

`_display_data` is a cache keyed by force name, not a single record.
The auto complete accumulator starts empty, so its fields are optional.
Game commands have no usage beyond their own help text.

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

exp_scenario/module/gui/module_inserter.lua

@@ -277,8 +277,8 @@ local function apply_planners_in_area(player, area, machine_name, planner_with_p
     -- Bounding box table to be reused in the loop below
     --- @type BoundingBox
     local param_area = {
-        left_top = {},
-        right_bottom = {}
+        left_top = { x = 0, y = 0 },
+        right_bottom = { x = 0, y = 0 },
     }
 
     -- Update area param table to be reused in the loop below

exp_scenario/module/gui/research_milestones.lua

@@ -128,6 +128,7 @@ Elements.milestone_table = Gui.define("research_milestones/milestone_table")
 
 do local _row_data = {}
     --- @type ExpGui_ResearchMilestones.elements.milestone_table.row_data
+    --- @diagnostic disable-next-line: missing-fields
     local empty_row_data = { color = font_color.positive }
 
     --- Get the row data for a force and research

exp_scenario/module/gui/science_production.lua

@@ -416,7 +416,7 @@ function Elements.eta_label.refresh(eta_label)
     eta_label.tooltip = display_data.tooltip
 end
 
-do local _display_data = {} --- @type Elements.eta_label.display_data
+do local _display_data = {} --- @type table<string, Elements.eta_label.display_data>
     --- Refresh the eta label for all online players
     function Elements.eta_label.refresh_online()
         -- Refresh the row data for online forces