Add comments for code structure clarity; enhance readability across multiple components

src/hooks/dbLink.js

@@ -1,22 +1,3 @@
-import Constants from 'expo-constants';
+const API_BASE_URL = 'http://localhost:3000';
 
-const hostFromExpo = Constants.expoConfig?.hostUri?.split(':')[0] || null;
-const apiBaseUrl = 'http://localhost:3000'; // Shirish, i need to deploy the database first so... wait until that... sorry buddy...
-// if you want you can run your own db locally i can send you the files for it just ask :(((
-
-const postJson = async (path, payload) => {
-  const response = await fetch(`${apiBaseUrl}${path}`, {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify(payload),
-  });
-  const result = await response.json();
-  if (!response.ok) {
-    throw new Error(result.message || 'Request failed');
-  }
-  return result;
-};
-
-export const postDb = async (action, payload = {}) => {
-  return postJson('/db', { action, payload });
-};
+export default API_BASE_URL;