dsh-web-gui-pack v0.1.0

DeepSeek Harness Web GUI personalization pack: whale-qwq (Joi two-outfit theme with tulip 4 / -01 custom sprites) + dsh-custom-bg (custom background plugin). Install: extract zip, then dsh plugin --profile web add

/whale-qwq and /dsh-custom-bg, restart the web GUI. See README.md / README.cn.md.