Add extended battle HUD visual coverage

tests/drivers/fixed_extended_world_hud_test.lua

@@ -0,0 +1,65 @@
+-- Visual acceptance driver for the first EXTENDED HUD configuration only:
+-- WIDE + FIXED + EXTENDED + WORLD.
+--   POKEPORT_DRIVER=tests/drivers/fixed_extended_world_hud_test.lua \
+--     POKEPORT_IDENTITY=fixed-extended-world POKEPORT_TOUCH=0 \
+--     SHOT_DIR=/tmp/shots love .
+return function(game)
+  local U = dofile("tests/drivers/util.lua")
+  local DIR = os.getenv("SHOT_DIR") or "/tmp/shots"
+  local BattleState = require("src.battle.BattleState")
+  local Pokemon = require("src.pokemon.Pokemon")
+
+  -- Match the 16:9 acceptance screenshot so the fixed 304x144 surface has
+  -- measurable space above and below it.
+  love.window.setMode(2048, 1152, { resizable = true })
+  U.wait(3)
+
+  local options = game.save.options
+  options.battleLayout = "wide"
+  options.battleFit = "fixed"
+  options.battleHud = "extended"
+  options.battleBg = "world"
+
+  game.save.party = { Pokemon.new(game.data, "PIKACHU", 100) }
+  U.teleport(game, "ROUTE_1", 5, 5, "down")
+  U.wait(60)
+
+  local battle = BattleState.newWild(game, "PIDGEY", 3,
+    { onFinish = function() end })
+  game.overworld:pushBattle(battle)
+  U.wait(360)
+
+  battle.introSlide = 0
+  battle.introBalls = nil
+  battle.showEnemyTrainer = false
+  battle.showPlayerBack = false
+  battle.enemySendingOut = false
+  battle.sendingOut = false
+  battle.phase = "menu"
+  battle.menuIndex = 1
+  U.wait(2)
+
+  local path = DIR .. "/fixed_extended_world_separate_layer.png"
+  os.remove(path)
+  local ok = U.shot(game, path)
+
+  love.window.setMode(960, 540, { resizable = true })
+  U.wait(5)
+  local smallPath = DIR .. "/fixed_extended_world_small_16x9.png"
+  os.remove(smallPath)
+  ok = U.shot(game, smallPath) and ok
+
+  love.window.setMode(2048, 1152, { resizable = true })
+  U.wait(5)
+  local NamingScreen = require("src.ui.NamingScreen")
+  game.stack:push(NamingScreen.new(game, {
+    title = "NICKNAME?", maxLen = 10, onDone = function() end,
+  }))
+  U.wait(5)
+  local overlayPath = DIR .. "/fixed_extended_world_naming_overlay.png"
+  os.remove(overlayPath)
+  ok = U.shot(game, overlayPath) and ok
+
+  U.log(ok and "FIXED_EXTENDED_WORLD_PASS" or "FIXED_EXTENDED_WORLD_FAIL")
+  love.event.quit(ok and 0 or 1)
+end