Align OpenAI key settings with local model profiles

app/api/settings/openai-key/route.ts

@@ -11,10 +11,23 @@ export const runtime = 'nodejs';
 
 function buildResponse(key: string | null) {
   const configured = isValidOpenAiKey(key);
+  const llmProfile = process.env.LLM_PROFILE || 'openai';
+  const embeddingProfile = process.env.EMBEDDING_PROFILE || 'openai';
+  const openAiKeyWritable = llmProfile === 'openai' || embeddingProfile === 'openai';
   return {
     configured,
     maskedKey: configured ? maskOpenAiKey(key) : null,
     envPath: getEnvLocalPath(),
+    openAiKeyWritable,
+    activeProfile: {
+      llmProfile,
+      llmModel: process.env.LLM_MODEL || (llmProfile === 'openai' ? 'gpt-4o-mini' : null),
+      llmBaseUrl: process.env.LLM_BASE_URL || null,
+      embeddingProfile,
+      embeddingModel: process.env.EMBEDDING_MODEL || (embeddingProfile === 'openai' ? 'text-embedding-3-small' : null),
+      embeddingBaseUrl: process.env.EMBEDDING_BASE_URL || process.env.LLM_BASE_URL || null,
+      embeddingDimensions: process.env.EMBEDDING_DIMENSIONS || (embeddingProfile === 'openai' ? '1536' : '1024'),
+    },
   };
 }
 
@@ -37,6 +50,17 @@ export async function POST(request: NextRequest) {
   try {
     const body = await request.json();
     const key = typeof body?.key === 'string' ? body.key.trim() : '';
+    const currentState = buildResponse(await readStoredOpenAiKey());
+
+    if (!currentState.openAiKeyWritable) {
+      return NextResponse.json(
+        {
+          error: 'OpenAI key entry is disabled because this install is using a local model profile. Change .env.local and rebuild embeddings to switch providers.',
+          ...currentState,
+        },
+        { status: 409 }
+      );
+    }
 
     if (!isValidOpenAiKey(key)) {
       return NextResponse.json(