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/jump_category.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# jump_category.sh - 分类跳转测试
+# 用法: jump_category.sh [categoryId] [categoryName]
+
+set -e
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/lib/common.sh"
+
+require_adb
+check_receiver_exists
+
+CATEGORY_ID="${1:-cat-demo-001}"
+CATEGORY_NAME="${2:-动作片}"
+
+print_header "分类跳转 JUMP/CATEGORY"
+PAYLOAD=$(build_jump_payload CATEGORY \
+  "categoryId=${CATEGORY_ID}" \
+  "categoryName=${CATEGORY_NAME}")
+
+send_voice_broadcast "JUMP" "${PAYLOAD}"
+log_ok "预期进入 ListActivity 并加载该分类"