feat(provider): add DeepSeek provider with configuration and icon support (#907)

electron/shared/providers/registry.ts

@@ -198,6 +198,30 @@ export const PROVIDER_DEFINITIONS: ProviderDefinition[] = [
       apiKeyEnv: 'SILICONFLOW_API_KEY',
     },
   },
+  {
+    id: 'deepseek',
+    name: 'DeepSeek',
+    icon: '🐋',
+    placeholder: 'sk-...',
+    model: 'DeepSeek',
+    requiresApiKey: true,
+    defaultBaseUrl: 'https://api.deepseek.com/v1',
+    showModelId: true,
+    showModelIdInDevModeOnly: true,
+    modelIdPlaceholder: 'deepseek-v4-pro',
+    defaultModelId: 'deepseek-v4-pro',
+    apiKeyUrl: 'https://platform.deepseek.com/api_keys',
+    category: 'official',
+    envVar: 'DEEPSEEK_API_KEY',
+    supportedAuthModes: ['api_key'],
+    defaultAuthMode: 'api_key',
+    supportsMultipleAccounts: true,
+    providerConfig: {
+      baseUrl: 'https://api.deepseek.com/v1',
+      api: 'openai-completions',
+      apiKeyEnv: 'DEEPSEEK_API_KEY',
+    },
+  },
   {
     id: 'minimax-portal',
     name: 'MiniMax (Global)',