refactor: update application code to use unified configuration

- Update App.tsx to use getAppConfig() instead of import.meta.env
- Update email templates to use getAppConfig() for base URL
- Update database strategy to use getDatabaseConfig() function
- Update mailgun service to use getter functions
- Remove direct unified config imports in favor of functions
- Ensure consistent configuration access throughout codebase

services/database/ProductionDatabaseStrategy.ts

@@ -10,7 +10,7 @@ import {
 } from '../../types';
 import { AccountStatus } from '../auth/auth.constants';
 import { DatabaseStrategy, DatabaseError } from './types';
-import { databaseConfig } from '../../config/unified.config';
+import { getDatabaseConfig } from '../../config/unified.config';
 import { logger } from '../logging';
 
 export class ProductionDatabaseStrategy implements DatabaseStrategy {
@@ -19,7 +19,7 @@ export class ProductionDatabaseStrategy implements DatabaseStrategy {
 
   constructor() {
     // Get CouchDB configuration from unified config
-    const dbConfig = databaseConfig;
+    const dbConfig = getDatabaseConfig();
 
     this.baseUrl = dbConfig.url;
     this.auth = btoa(`${dbConfig.username}:${dbConfig.password}`);
@@ -28,9 +28,6 @@ export class ProductionDatabaseStrategy implements DatabaseStrategy {
       url: dbConfig.url,
       username: dbConfig.username,
     });
-
-    // Initialize databases
-    this.initializeDatabases();
   }
 
   private async initializeDatabases(): Promise<void> {