fix: gemini & vertex tools (#2053)

* fix: tool calling with gemini and vertex

* chore: remove unnecessary comments

* chore: fix doc type errors

* feat: do not manually pass tool use list

lua/avante/providers/vertex.lua

@@ -14,6 +14,7 @@ M.role_map = {
 M.is_disable_stream = Gemini.is_disable_stream
 M.parse_messages = Gemini.parse_messages
 M.parse_response = Gemini.parse_response
+M.transform_to_function_declaration = Gemini.transform_to_function_declaration
 
 local function execute_command(command)
   local handle = io.popen(command)
@@ -34,23 +35,17 @@ end
 
 function M:parse_curl_args(prompt_opts)
   local provider_conf, request_body = P.parse_config(self)
+
   local location = vim.fn.getenv("LOCATION")
   local project_id = vim.fn.getenv("PROJECT_ID")
   local model_id = provider_conf.model or "default-model-id"
+
   if location == nil or location == vim.NIL then location = "default-location" end
   if project_id == nil or project_id == vim.NIL then project_id = "default-project-id" end
-  local url = provider_conf.endpoint:gsub("LOCATION", location):gsub("PROJECT_ID", project_id)
 
+  local url = provider_conf.endpoint:gsub("LOCATION", location):gsub("PROJECT_ID", project_id)
   url = string.format("%s/%s:streamGenerateContent?alt=sse", url, model_id)
 
-  request_body = vim.tbl_deep_extend("force", request_body, {
-    generationConfig = {
-      temperature = request_body.temperature,
-      maxOutputTokens = request_body.max_tokens,
-    },
-  })
-  request_body.temperature = nil
-  request_body.max_tokens = nil
   local bearer_token = M.parse_api_key()
 
   return {
@@ -61,7 +56,7 @@ function M:parse_curl_args(prompt_opts)
     },
     proxy = provider_conf.proxy,
     insecure = provider_conf.allow_insecure,
-    body = vim.tbl_deep_extend("force", {}, self:parse_messages(prompt_opts), request_body),
+    body = Gemini.prepare_request_body(self, prompt_opts, provider_conf, request_body),
   }
 end