dsh-input-plus: @ Path References and /h History Candidates for DSH Web UI Input Box

dsh-input-plus is an MIT-licensed input enhancement plugin for the DSH Web UI, maintained by WhitePlusMS. It does not replace official components but extends the official `@` and `/` trigger mechanisms, primarily offering two major features: first, typing `@` allows quick selection of file or directory paths from the current Session workspace, with only plain-text path references retained in the draft, and no file reading, directory expansion, or manifest generation occurs upon sending; second, typing `/h` opens a candidate menu of successfully submitted user prompt history from the current Session, supporting keyword filtering to reuse previous prompts. This plugin requires DSH 0.1.0-rc.6 or a compatible version, and must be installed via the official plugin process using a GitHub tag compressed package, ensuring it is built before installation.