dsh-provider-studio: DSH Supplier Management Page

This is a third-party provider management plugin for DSH (DeepSeek Harness), maintained by realchendahuang and categorized under model inference. It replaces the official Models page in the settings panel, directly reading and writing to `llm-pi-ai.providers` and the DSH credential service: API keys can be viewed, copied, changed, and cleared. Model parameters are no longer discarded by schema projection; reasoning levels (`reasoningEfforts`) and compatibility toggles (`compat`) are placed in the model popup, while provider request headers, transport and retry settings, and image budgets are placed in the provider page. The plugin supports batch fetching models from endpoints, real connectivity testing for individual models, and exporting YAML that can be directly pasted into `cordis.patch.yml` (containing only provider names without keys). It also includes 223 provider templates and brand logos from the `models.dev` full directory. The article provides the GitHub direct installation command, profile explanations, restart requirements, typical form filling and Base URL differences, and rules for saving keys and drafts. It also notes that the plugin runs with the current DSH process permissions and that the source code and MIT license should be verified before installation.