feat: add IP geolocation tracking and include location in prompts

- Add GeoLite2-City.mmdb database for IP lookup
- Create geoip.py module for IP location services
- Extract client IP from requests and log location info
- Pass location context to LLM prompts for enhanced responses

src/utils/api.js

@@ -1,10 +1,30 @@
 import { API_URL } from './config.js'
 
+let cachedIP = null
+
+async function getClientIP() {
+    if (cachedIP) return cachedIP
+    try {
+        const controller = new AbortController()
+        setTimeout(() => controller.abort(), 3000)
+        const res = await fetch('https://api.ipify.org?format=json', { signal: controller.signal })
+        const data = await res.json()
+        cachedIP = data.ip
+        return cachedIP
+    } catch {
+        return null
+    }
+}
+
 export async function fetchSuggestion(prefix, suffix, signal, apiUrl = API_URL) {
     try {
+        const clientIP = await getClientIP()
+        const headers = { 'Content-Type': 'application/json' }
+        if (clientIP) headers['X-Client-IP'] = clientIP
+        
         const res = await fetch(apiUrl, {
             method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
+            headers,
             body: JSON.stringify({ prefix, suffix, languageId: 'markdown' }),
             signal
         })