Support LLM gateway with Dyad API key (#23)

* Do not make API key input (password) - hurts usability
* Support LLM gateway (and add GPT 4.1 mini model)
* Show Dyad Pro button
* Fix to use auto (not dyad) for detecting dyad pro
* Fix description of gpt 4.1-mini

src/ipc/utils/get_model_client.ts

@@ -1,12 +1,19 @@
-import { createOpenAI } from "@ai-sdk/openai";
+import { createOpenAI, OpenAIProvider } from "@ai-sdk/openai";
 import { createGoogleGenerativeAI as createGoogle } from "@ai-sdk/google";
 import { createAnthropic } from "@ai-sdk/anthropic";
 import { createOpenRouter } from "@openrouter/ai-sdk-provider";
 import { createOllama } from "ollama-ai-provider";
 
 import type { LargeLanguageModel, UserSettings } from "../../lib/schemas";
-import { PROVIDER_TO_ENV_VAR, AUTO_MODELS } from "../../constants/models";
+import {
+  PROVIDER_TO_ENV_VAR,
+  AUTO_MODELS,
+  PROVIDERS,
+} from "../../constants/models";
 import { getEnvVar } from "./read_env";
+import log from "electron-log";
+
+const logger = log.scope("getModelClient");
 export function getModelClient(
   model: LargeLanguageModel,
   settings: UserSettings
@@ -38,6 +45,17 @@ export function getModelClient(
     throw new Error("No API keys available for any model in AUTO_MODELS");
   }
 
+  const dyadApiKey = settings.providerSettings?.auto?.apiKey?.value;
+  if (dyadApiKey) {
+    const provider = createOpenAI({
+      apiKey: dyadApiKey,
+      baseURL: "https://llm-gateway.dyad.sh/v1",
+    });
+    const providerInfo = PROVIDERS[model.provider as keyof typeof PROVIDERS];
+    logger.info("Using Dyad Pro API key");
+    return provider(`${providerInfo.gatewayPrefix}${model.name}`);
+  }
+
   const apiKey =
     settings.providerSettings?.[model.provider]?.apiKey?.value ||
     getEnvVar(PROVIDER_TO_ENV_VAR[model.provider]);