feat: dev-5.1 分支基线（v1.3.35 发版后代码 + 5.1 声道改造文档）

- 以 main(ccc65af) 为基线提交当前工作区代码
- 新增 5.1 声道改造文档两份
- .gitignore 补充 .vscode/、.screenshots/

test/voice_helper/search.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# search.sh - 语音搜索测试
+# 用法: search.sh <filmName> [actorName] [directorName] [category] [unionStyle] [region] [releaseDate]
+# 示例: search.sh "流浪地球"
+#       search.sh "流浪地球" "吴京"
+
+set -e
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/lib/common.sh"
+
+require_adb
+check_receiver_exists
+
+if [ $# -lt 1 ]; then
+  log_err "至少需要一个搜索关键词"
+  echo "用法: $0 <filmName> [actorName] [directorName] [category] [unionStyle] [region] [releaseDate]" >&2
+  exit 1
+fi
+
+# 按协议 §6.1 SEARCH payload 字段顺序做位置映射
+KEYS=(filmName actorName directorName category unionStyle region releaseDate)
+
+print_header "语音搜索 SEARCH"
+
+ARGS=()
+for i in $(seq 1 $#); do
+  idx=$((i - 1))
+  if [ $idx -lt ${#KEYS[@]} ]; then
+    val="${!i}"
+    if [ -n "${val}" ]; then
+      ARGS+=("${KEYS[$idx]}=${val}")
+    fi
+  fi
+done
+
+PAYLOAD=$(build_search_payload "${ARGS[@]}")
+send_voice_broadcast "SEARCH" "${PAYLOAD}"
+log_ok "预期进入 SearchActivity 并自动搜索，焦点落首张结果卡片"