feat: Korean Chrome locale, agents/llm.md voice instructions, drop emoji rule

- run-chrome.sh: render web content (YouTube/Google/Naver) in Korean. --lang
  only sets Chrome's UI; the Accept-Language sent to sites comes from the
  profile's intl.accept_languages, which a persisted user-data-dir kept at
  en-US. Seed the profile to ko-KR and add --accept-lang=ko-KR,ko.
- agents/llm.md: runtime instructions for the reply LLM (loaded by the agents
  feature) — name "자비스", concise 1-2 sentence TTS replies (no emojis/markdown),
  nuance-based intent, and YouTube voice controls (open/search/play Nth/pause/
  back) via the on-screen browser tool.
- CLAUDE.md: drop the "use emojis in CLI output" rule — this assistant replies by
  Discord voice, not CLI, so output should be plain.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker/run-chrome.sh

@@ -18,6 +18,27 @@ cat > /etc/opt/chrome/policies/managed/jarvis.json <<'JSON'
 { "CommandLineFlagSecurityWarningsEnabled": false }
 JSON
 
+# Seed the profile's web-content language to Korean so sites (YouTube, Google,
+# Naver) render in Korean. --lang sets Chrome's own UI, but the Accept-Language
+# sent to sites comes from the profile's intl.accept_languages, which a persisted
+# user-data-dir would otherwise keep at en-US regardless of --accept-lang.
+PREFS_DIR="${CHROME_PROFILE_DIR:-/root/chrome-profile}/Default"
+PREFS="${PREFS_DIR}/Preferences"
+mkdir -p "$PREFS_DIR"
+if [ -f "$PREFS" ]; then
+  python3 - "$PREFS" <<'PY' 2>/dev/null || true
+import json, sys
+p = sys.argv[1]
+d = json.load(open(p))
+d.setdefault("intl", {})
+d["intl"]["accept_languages"] = "ko-KR,ko"
+d["intl"]["selected_languages"] = "ko-KR,ko"
+json.dump(d, open(p, "w"), ensure_ascii=False)
+PY
+else
+  printf '%s' '{"intl":{"accept_languages":"ko-KR,ko","selected_languages":"ko-KR,ko"}}' > "$PREFS"
+fi
+
 # Minimal, non-automation flags. --remote-debugging exposes CDP so the brain can
 # drive this on-screen Chrome (Google/YouTube/Naver), --disable-features=Translate
 # hides the translate popup. NO --test-type / --disable-blink-features.
@@ -26,6 +47,7 @@ exec google-chrome \
   --no-default-browser-check \
   --disable-features=Translate,TranslateUI \
   --lang=ko-KR \
+  --accept-lang=ko-KR,ko \
   --remote-debugging-port="${CDP_PORT:-9222}" \
   --remote-debugging-address="${CDP_BIND:-127.0.0.1}" \
   --user-data-dir="${CHROME_PROFILE_DIR:-/root/chrome-profile}" \