💻 变更类型 | Change Type

• feat

🔀 变更说明 | Description of Change

Adds OrcaRouter as a named model provider in NextChat, wired the same way the existing AI302 provider is: server-side route (/api/orcarouter), client platform, model picker entry, settings UI, ORCAROUTER_API_KEY / ORCAROUTER_URL env vars, locale blocks, README docs and a unit test.

OrcaRouter is an OpenAI-compatible model routing gateway that brings 150+ models from OpenAI, Anthropic, Google, DeepSeek, Qwen, MiniMax and xAI behind a single endpoint and API key. Beyond routing, it runs gateway-level, zero-trust security for AI agents on the same endpoint — screening every prompt/response and governing every tool call on a default-deny basis, with no application code changes. This PR registers it as a named provider so users can opt in directly.

I'm an engineer on the OrcaRouter team.

📝 补充信息 | Additional Information

What this changes:

• app/constant.ts: ORCAROUTER_BASE_URL, ApiPath.OrcaRouter, ServiceProvider.OrcaRouter, ModelProvider.OrcaRouter and an OrcaRouter endpoint object (base https://api.orcarouter.ai, v1/chat/completions, v1/models)
• app/api/orcarouter.ts (new): server-side handler mirroring the AI302 handler (base URL from serverConfig.orcarouterUrl, model filtering for the OrcaRouter service)
• app/api/[provider]/[...path]/route.ts: dispatch ApiPath.OrcaRouter to the new handler
• app/api/auth.ts: ORCAROUTER_API_KEY auth case
• app/client/platforms/orcarouter.ts (new): client LLMApi implementation (ChatPath / ListModelPath, provider metadata)
• app/client/api.ts: provider factory case, key selection from accessStore.orcarouterApiKey
• app/config/server.ts: ORCAROUTER_URL and ORCAROUTER_API_KEY env vars
• app/store/access.ts: orcarouterUrl / orcarouterApiKey state and isValidOrcaRouter
• app/components/settings.tsx: endpoint + API key settings UI (mirrors the AI302 block)
• app/components/emoji.tsx + app/icons/llm-icons/orcarouter.svg (new): provider icon
• app/locales/{cn,da,de,en,es,fr,it,ko,pt,ru,tw,vi}.ts: locale blocks
• .env.template, README.md, README_CN.md, README_KO.md: env var docs
• app/utils.ts: enable plugins for OrcaRouter
• test/model-helpers.test.ts: unit test for showPlugins(ServiceProvider.OrcaRouter, ...)

How to use it:

1. Get an API key at https://www.orcarouter.ai/console (keys start with sk-orca-).
2. Set ORCAROUTER_API_KEY.
3. Pick OrcaRouter as the provider and choose a model id such as openai/gpt-4-turbo, anthropic/claude-sonnet-5 or deepseek/deepseek-chat.

Verification:

• yarn test:ci (jest): 34 suites, 157 tests passed
• tsc --noEmit: clean
• next build: exit 0
• Live API against https://api.orcarouter.ai/v1 with a real key: models list (193 models), non-stream and stream chat completions, tool calling, 401 on bad key, and model-not-found errors all verified