fix: resolve scroll flickering on message send and improve thinking state animation (#1333)

lib/ai/prompts.ts

@@ -117,4 +117,4 @@ export const titlePrompt = `\n
     - you will generate a short title based on the first message a user begins a conversation with
     - ensure it is not more than 80 characters long
     - the title should be a summary of the user's message
-    - do not use quotes or colons`
+    - do not use quotes or colons`;

lib/ai/tools/get-weather.ts

@@ -1,20 +1,24 @@
 import { tool } from "ai";
 import { z } from "zod";
 
-async function geocodeCity(city: string): Promise<{ latitude: number; longitude: number } | null> {
+async function geocodeCity(
+  city: string
+): Promise<{ latitude: number; longitude: number } | null> {
   try {
     const response = await fetch(
       `https://geocoding-api.open-meteo.com/v1/search?name=${encodeURIComponent(city)}&count=1&language=en&format=json`
     );
-    
-    if (!response.ok) return null;
-    
+
+    if (!response.ok) {
+      return null;
+    }
+
     const data = await response.json();
-    
+
     if (!data.results || data.results.length === 0) {
       return null;
     }
-    
+
     const result = data.results[0];
     return {
       latitude: result.latitude,
@@ -26,11 +30,15 @@ async function geocodeCity(city: string): Promise<{ latitude: number; longitude:
 }
 
 export const getWeather = tool({
-  description: "Get the current weather at a location. You can provide either coordinates or a city name.",
+  description:
+    "Get the current weather at a location. You can provide either coordinates or a city name.",
   inputSchema: z.object({
     latitude: z.number().optional(),
     longitude: z.number().optional(),
-    city: z.string().describe("City name (e.g., 'San Francisco', 'New York', 'London')").optional(),
+    city: z
+      .string()
+      .describe("City name (e.g., 'San Francisco', 'New York', 'London')")
+      .optional(),
   }),
   execute: async (input) => {
     let latitude: number;
@@ -50,7 +58,8 @@ export const getWeather = tool({
       longitude = input.longitude;
     } else {
       return {
-        error: "Please provide either a city name or both latitude and longitude coordinates.",
+        error:
+          "Please provide either a city name or both latitude and longitude coordinates.",
       };
     }
 
@@ -59,11 +68,11 @@ export const getWeather = tool({
     );
 
     const weatherData = await response.json();
-    
+
     if ("city" in input) {
       weatherData.cityName = input.city;
     }
-    
+
     return weatherData;
   },
 });