feat: add Novita AI as LLM provider

Add Novita AI as a new LLM provider with OpenAI-compatible API support.
Users can now select Novita from all entry points (CLI, config, UI).

- Add 'novita' to ProviderName type
- Add Novita AI entry to PROVIDER_INFO with default base URL
- Add Novita suggested models (kimi-k2.5, glm-5, minimax-m2.5)
- Add 'novita' to ALLOWED_CLIENT_PROVIDERS
- Add NOVITA_API_KEY environment variable mapping
- Add novita case to getAIModel() switch using OpenAI-compatible API
- Add novita to SINGLE_SYSTEM_PROVIDERS for proper message handling

lib/types/model-config.ts

@@ -21,6 +21,7 @@ export type ProviderName =
     | "qiniu"
     | "kimi"
     | "minimax"
+    | "novita"
 
 // Individual model configuration
 export interface ModelConfig {
@@ -101,6 +102,7 @@ export const PROVIDER_LOGO_MAP: Record<string, string> = {
     doubao: "bytedance",
     modelscope: "modelscope",
     minimax: "minimax",
+    novita: "novita",
 }
 
 // Provider metadata
@@ -179,6 +181,10 @@ export const PROVIDER_INFO: Record<
         label: "MiniMax",
         defaultBaseUrl: "https://api.minimaxi.com/anthropic",
     },
+    novita: {
+        label: "Novita AI",
+        defaultBaseUrl: "https://api.novita.ai/openai",
+    },
 }
 
 // Suggested models per provider for quick add
@@ -350,6 +356,12 @@ export const SUGGESTED_MODELS: Partial<Record<ProviderName, string[]>> = {
         "MiniMax-M2.5",
         "MiniMax-M2.5-highspeed",
     ],
+    novita: [
+        // Novita AI models (OpenAI-compatible API)
+        "moonshotai/kimi-k2.5",
+        "zai-org/glm-5",
+        "minimax/minimax-m2.5",
+    ],
 }
 
 // Helper to generate UUID