Build a Google Apps Script with Gemini

Create a Google Apps Script that [DESCRIBE FUNCTIONALITY]. The script should:

1. **Core Logic**:
   - Implement the main functionality with clear function decomposition
   - Handle Google Workspace API calls (Sheets, Docs, Drive, Gmail, Calendar as needed)
   - Include proper error handling with try-catch blocks and user-friendly error messages

2. **Triggers and Automation**:
   - Set up appropriate triggers (onOpen, onEdit, time-driven, form submit)
   - Include installable trigger setup function
   - Handle trigger authorization properly

3. **User Interface**:
   - Create custom menu items in the Google app
   - Build sidebar or dialog UI with HTML Service if needed
   - Include loading spinners and success/error notifications

4. **Data Handling**:
   - Batch operations for efficiency (getValues/setValues instead of cell-by-cell)
   - PropertiesService for configuration storage
   - CacheService for frequently accessed data
   - Proper handling of sheet data types (dates, numbers, strings)

5. **Best Practices**:
   - Stay within Apps Script quotas (6 min execution, API rate limits)
   - Use LockService for concurrent access
   - Add JSDoc comments for all functions
   - Include a README section as comments at the top

Provide the complete script ready to paste into Apps Script editor.