tools: a ja capture of DIFFICULTY, to settle whether GP_DIALOG 2/3 are a language pair

The byte comparison showed 2/3 differ in 2.77 % while sharing every element name --
what a language pair looks like -- but that they are ENGLISH and JAPANESE rested on
the disc's convention rather than on this screen. This captures it in ja.

Reuses submenu_focus_sweep.py with SWEEP_TARGETS=0 rather than a new probe, so the
JP capture is taken by the same navigation that produced the English one. The locale
is restored on ANY exit including a crash, and the probe never presses A inside a
submenu, so it cannot reach SELECT DATA and the guest throw.

Committed before running.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v

tools/re-capture/jp_difficulty_session.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Capture the DIFFICULTY screen in JAPANESE, and ALWAYS put the locale back.
+#
+# QUESTION: GP_DIALOG entries 2/3 differ in 2.77 % of bytes while sharing every
+# element name, which is what a language pair looks like -- but I have never
+# captured DIFFICULTY in `ja`, so "English and Japanese" rested on the disc's
+# convention rather than on this screen (dialog-0-1-is-a-duplicate.txt).
+#
+# ⚠️ SAFE ON THIS PATH AND ONLY THIS ONE. DIFFICULTY's forward path -- Ⓐ on a
+# difficulty -> SELECT DATA -> guest throw at PC 0x82307128 -- crashes the game.
+# submenu_focus_sweep.py presses Ⓐ to ENTER, one DOWN, then Ⓑ to leave, and never
+# presses Ⓐ inside a submenu. Do not add one.
+#
+# Reuses the sweep with SWEEP_TARGETS=0 rather than a new probe, so the capture is
+# taken by the same navigation that produced the English one.
+set -u
+export HOME=/sylph-home/re SDL_AUDIODRIVER=dummy DISPLAY=:98
+SD="$(cd "$(dirname "$0")" && pwd)"
+OUT="${OUT:-/sylph-home/re/jpdifficulty}"; mkdir -p "$OUT"
+
+restore() { echo "-- restoring locale --"; python3 "$SD/set_console_language.py" en || true; }
+trap restore EXIT INT TERM
+
+python3 "$SD/set_console_language.py" ja || { echo "LOCALE SET FAILED"; exit 2; }
+echo "── EFFECTIVE CONFIG ──"
+echo "   locale   = ja (restored on ANY exit, including a crash)"
+echo "   out      = $OUT"
+echo "   probe    = submenu_focus_sweep.py SWEEP_TARGETS=0 (never presses A inside)"
+
+OUT="$OUT" SWEEP="$SD/submenu_focus_sweep.py" SWEEP_TARGETS=0 \
+  bash "$SD/extras_focus_session.sh"