Translate Pokegear's AM/PM too, and warn instead of corrupting a 3rd line

An independent review flagged two gaps:

Pokegear.lua's clock card (drawClock and the card-list clock view) prints
the same AM/PM information MainMenu's clock box does, but was left as bare
literals -- so a mod translating AM/PM would now show it correctly on the
title screen and in English on the Pokegear for the exact same hour. Both
call sites now go through Strings("AM")/Strings("PM"), the same source key
MainMenu.lua already added, so no new corpus entry is needed on the
translation-mods side.

SaveMenu.lua's twoLines() only ever split on the first "\n": drawPanel's
box has room for exactly two Chrome.print calls, so a translation needing
a third line (nothing in the current fr/de/es/it overrides does, but
nothing stopped one from trying) had nowhere on screen to go, and the
extra "\n" landed as a literal newline byte drawn as glyph garbage on the
second line with no indication anything was wrong. It now warns once per
source text instead.

Added a gen2_save_menu_translation_test.lua case driving drawPanel() with a
three-line mod translation: confirms only the first two lines render, the
warning fires exactly once (not once per frame), and drawing does not
crash. Pokegear.lua has no engine-tier test suite to extend for the AM/PM
change; verified by direct inspection and a syntax check instead.

tests/engine/gen2_save_menu_translation_test.lua

@@ -164,4 +164,36 @@ do
   T.eq(SaveMenu.SAVING_PROMPT[2], "OFF THE POWER.", "and its second line")
 end
 
+-- A translation with a THIRD line (a second embedded "\n") has nowhere on
+-- screen to go -- drawPanel's box has room for exactly two Chrome.print
+-- calls -- so it must not silently draw the literal newline byte as glyph
+-- garbage on the second line, and should warn so a translator notices.
+do
+  Strings.load({
+    strings = {
+      ["Would you like to\nsave the game?"] = "Ligne un\nLigne deux\nLigne trois",
+    },
+  })
+
+  local warned = {}
+  require("src.core.Logger").warn = function(fmt, ...)
+    warned[#warned + 1] = select("#", ...) > 0 and fmt:format(...) or fmt
+  end
+
+  local menu = SaveMenu.new({}, { save = SAVE, existed = false })
+  drawn = {}
+  menu:drawPanel()
+  T.eq(drawnAt(PROMPT1_X, PROMPT1_Y), "Ligne un", "only the first line reaches the box")
+  T.eq(drawnAt(PROMPT2_X, PROMPT2_Y), "Ligne deux\nLigne trois",
+    "the rest lands in the second slot rather than vanishing")
+  T.check(#warned == 1, "and a single warning is logged")
+
+  drawn = {}
+  menu:drawPanel()
+  T.check(#warned == 1, "the warning does not repeat for the same text")
+
+  require("src.core.Logger").warn = function() end
+  Strings.load({})
+end
+
 T.finish("gen2_save_menu_translation_test")