# Task: Combine pool and history stats into a single function and single menu item

## Changes Made

### 1. Created New Combined Stats Function
- Added `show_combined_stats()` method to `JournalPromptGenerator` class
- Combines both pool statistics and history statistics into a single function
- Displays two tables: "Prompt Pool Statistics" and "Prompt History Statistics"

### 2. Updated Interactive Menu
- Changed menu from 5 options to 4 options:
  - 1. Draw prompts from pool (no API call)
  - 2. Fill prompt pool using API
  - 3. View combined statistics (replaces separate pool and history stats)
  - 4. Exit
- Updated menu handling logic to use the new combined stats function

### 3. Updated Command-Line Arguments
- Removed `--pool-stats` argument
- Updated `--stats` argument description to "Show combined statistics (pool and history)"
- Updated main function logic to use `show_combined_stats()` instead of separate functions

### 4. Removed Old Stats Functions
- Removed `show_pool_stats()` method
- Removed `show_history_stats()` method
- All functionality consolidated into `show_combined_stats()`

### 5. Code Cleanup
- Removed unused imports and references to old stats functions
- Ensured all menu options work correctly with the new combined stats

## Testing
- Verified `--stats` command-line argument works correctly
- Tested interactive mode shows updated menu
- Confirmed combined stats display both pool and history information
- Tested default mode (draw from pool) still works
- Verified fill-pool option starts correctly

## Result
Successfully combined pool and history statistics into a single function and single menu item, simplifying the user interface while maintaining all functionality.