chicheng-gate: Remote Access to DSH Web GUI, frpc Tunnel, and Panel Password Gate

chicheng-gate is a secure access plugin for the DSH Web GUI, designed to address remote access, intranet penetration, and mobile adaptation challenges. It integrates four core features: first, a remote access toggle that switches the Web GUI binding address to `0.0.0.0` to support LAN access; second, frpc intranet penetration, which automatically downloads and manages the frpc process, exposes the panel to the public internet by configuring server address, port, and other parameters, and supports real-time start/stop; third, a panel password gate that enforces password verification for non-local access (including LAN and frpc tunnel), stores passwords using scrypt salted hashing, implements login rate limiting and session management, while local `127.0.0.1` access remains password-free; fourth, mobile UI adaptation that injects CSS to optimize the mobile experience. Additionally, the plugin provides