v2收尾：手势升级 + 暂停退出 + 结局语音化 + 分支补全 + 12条新音频

gestures.js: 新增长按(1s)、两指长按(暂停)、三指点击(退出)，支持多指检测
engine.js: REPLY_COUNT变量、长按重播/状态广播、暂停恢复退出机制、
  选择提示音、结局台词预录音频替换TTS、内容预警+心理热线
story.js: MSG-10/11 follow-up补全down(沉默)选项
index.html: 操作指南添加长按/安全手势、内容预警文字
batch_tts_voxcpm.py: 新增12条台词(结局旁白+系统提示+分支NPC反应)
audio/mp3/tts: 12个VoxCPM2生成的林夏声线MP3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

audio/convert_new_tts.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+# 将新生成的 WAV 文件转为 MP3 并复制到游戏 tts 目录
+set -e
+
+RAW_DIR="/home/xsl/blind/audio/00_raw/tts"
+OUT_DIR="/home/xsl/blind/audio/mp3/tts"
+
+NEW_FILES=(
+  "v2_ending_a_linxia_wav_v1"
+  "v2_ending_b_linxia_wav_v1"
+  "v2_ending_c_linxia_wav_v1"
+  "v2_ending_d_linxia_wav_v1"
+  "v2_ending_e_linxia_wav_v1"
+  "v2_sys_wait_reply_wav_v1"
+  "v2_sys_paused_wav_v1"
+  "v2_sys_content_warning_wav_v1"
+  "v2_sys_hotline_wav_v1"
+  "v2_msg10_rw_react_silent_wav_v1"
+  "v2_msg10_call_react_down_wav_v1"
+  "v2_msg11_r3_react_silent_wav_v1"
+)
+
+ok=0
+fail=0
+
+for name in "${NEW_FILES[@]}"; do
+  src="${RAW_DIR}/${name}.wav"
+  dst="${OUT_DIR}/${name}.mp3"
+
+  if [ ! -f "$src" ]; then
+    echo "[SKIP] $name.wav not found"
+    ((fail++))
+    continue
+  fi
+
+  if [ -f "$dst" ]; then
+    echo "[EXISTS] $name.mp3"
+    ((ok++))
+    continue
+  fi
+
+  echo -n "[CONVERT] $name ... "
+  ffmpeg -y -i "$src" -codec:a libmp3lame -b:a 128k -ar 24000 -ac 1 "$dst" 2>/dev/null
+  if [ $? -eq 0 ]; then
+    echo "ok ($(du -h "$dst" | cut -f1))"
+    ((ok++))
+  else
+    echo "FAILED"
+    ((fail++))
+  fi
+done
+
+echo ""
+echo "Done: $ok ok, $fail failed"