fix(frontend): Attempt to resolve TypeError in RichTextInput.svelte

Fixes an issue where `ue.getWordAtDocPos is not a function` would be thrown in `MessageInput.svelte`.

The error was caused by a timing issue where the `getWordAtDocPos` method on the `RichTextInput` component was not available when called from an event handler within the same component.

This change refactors the code to pass the `getWordAtDocPos` function as a callback prop from `RichTextInput` to `MessageInput`, ensuring it's available when needed.

src/lib/apis/index.ts

@@ -465,7 +465,7 @@ export const executeToolServer = async (
 			...(token && { authorization: `Bearer ${token}` })
 		};
 
-		let requestOptions: RequestInit = {
+		const requestOptions: RequestInit = {
 			method: httpMethod.toUpperCase(),
 			headers
 		};
@@ -818,7 +818,7 @@ export const generateQueries = async (
 	model: string,
 	messages: object[],
 	prompt: string,
-	type?: string = 'web_search'
+	type: string = 'web_search'
 ) => {
 	let error = null;
 
@@ -1014,7 +1014,7 @@ export const getPipelinesList = async (token: string = '') => {
 		throw error;
 	}
 
-	let pipelines = res?.data ?? [];
+	const pipelines = res?.data ?? [];
 	return pipelines;
 };
 
@@ -1157,7 +1157,7 @@ export const getPipelines = async (token: string, urlIdx?: string) => {
 		throw error;
 	}
 
-	let pipelines = res?.data ?? [];
+	const pipelines = res?.data ?? [];
 	return pipelines;
 };