Fix API endpoint configuration with environment-aware URLs

- Add environment-based API URL configuration (dev: localhost:8000, prod: api.pennyzo.com)
- Update PennyzoApiService to use centralized config with timeout settings
- Fix API status checker scripts to load .env variables using dotenv
- Add environment management scripts (set-env.ps1) with npm shortcuts
- Create comprehensive configuration testing and validation tools
- Add TypeScript definitions for Vite environment variables
- Update all documentation with new environment configuration instructions
- Install dotenv package for Node.js environment variable loading
- All APIs now correctly use environment-appropriate URLs automatically

scripts/README.md

@@ -38,6 +38,40 @@ These scripts test both public and authenticated endpoints of the Pennyzo Genera
 
 Both required packages are already installed in the project.
 
+## Environment Configuration
+
+The API endpoints are now environment-aware. By default:
+
+- **Development**: `http://localhost:8000`
+- **Production**: `https://api.pennyzo.com/api/v1/general`
+
+### Setting Environment
+
+Use the following npm scripts to configure your environment:
+
+```bash
+# Set development environment (localhost:8000)
+npm run env:dev
+
+# Set production environment (api.pennyzo.com)
+npm run env:prod
+
+# Show current environment configuration
+npm run env:show
+```
+
+Alternatively, manually create a `.env` file:
+
+```bash
+# For development
+VITE_API_BASE_URL=http://localhost:8000
+NODE_ENV=development
+
+# For production
+VITE_API_BASE_URL=https://api.pennyzo.com/api/v1/general
+NODE_ENV=production
+```
+
 ## Usage
 
 ### Using npm Scripts (Recommended)