Add vision support (#4076)

app/constant.ts

@@ -88,6 +88,7 @@ export const Azure = {
 export const Google = {
   ExampleEndpoint: "https://generativelanguage.googleapis.com/",
   ChatPath: "v1beta/models/gemini-pro:generateContent",
+  VisionChatPath: "v1beta/models/gemini-pro-vision:generateContent",
 
   // /api/openai/v1/chat/completions
 };
@@ -103,6 +104,7 @@ Latex block: $$e=mc^2$$
 `;
 
 export const SUMMARIZE_MODEL = "gpt-3.5-turbo";
+export const GEMINI_SUMMARIZE_MODEL = "gemini-pro";
 
 export const KnowledgeCutOffDate: Record<string, string> = {
   default: "2021-09",
@@ -278,6 +280,15 @@ export const DEFAULT_MODELS = [
       providerType: "google",
     },
   },
+  {
+    name: "gemini-pro-vision",
+    available: true,
+    provider: {
+      id: "google",
+      providerName: "Google",
+      providerType: "google",
+    },
+  },
 ] as const;
 
 export const CHAT_PAGE_SIZE = 15;