proxy-rewrite.regex_uri need empty value to replaced

[liangliang4ward]

Issue description

at dashboard when proxy-rewrite.regex-uri can't replace empty value;but use apisix api support empty value.

Expected behavior

support empty value to replaced

How to Reproduce

use dashboard plugin-rewrite plugin

Screenshots

No response

Environment

• apisix version (cmd: apisix version): 2.12.1& dashboard lasted
• OS (cmd: uname -a):
• OpenResty / Nginx version (cmd: nginx -V or openresty -V):
• etcd version, if have (cmd: run etcd --version):
• apisix-dashboard version, if have:
• Browser version, if have:

Additional context

No response

[zaunist]

Good catch, I think we should fix this problem.

[leslie-tsang]

@liangliang4ward would you like to fix it ?

[liangliang4ward]

@liangliang4ward would you like to fix it ?

ok; assign me.

but I never download dashboard code .hhh

let me try.