dsh-selection-ask: One-click quote of selected dialogue text to composer

dsh-selection-ask is a DeepSeek Harness (DSH) web plugin maintained by lzbaclz, designed to optimize the context reuse experience. Users simply need to select specific text in the conversation interface, and a "Ask DeepSeek" button will appear next to the selection. Clicking this button automatically fills the selected content into the composer in Markdown blockquote format, eliminating the need for manual copy-pasting. The plugin only processes text in conversation records, using the `inputActions.setDraft` API to write drafts, ensuring security. Version 0.1.0 is available under the MIT license, with pre-built packages provided for installation without local building. Installation requires adding the plugin via the `dsh plugin` command from a GitHub or local link, and enabling it may prompt a restart.