Market Pilot

## MarketPilot 0.5.9
Changes since 0.5.5:

### Added
- Selecting a material while the Auction House is open now refreshes its market data and opens its search in Browse Auctions.
- Added Market Summary to the Current tab, explaining the reference price, central price band, lowest listing, listed quantity, and outlier filtering.
- Added Historical Context to the History tab, explaining available price comparisons, trends, supply, and historical price position.
- Prices now use the game's gold, silver, and copper icons throughout Market Watch, Current, History, and summaries.

### Improvements and fixes
- Fixed native searches showing no results when pressing the Auction House Search button manually would find the item.
- Native searches wait for the market scan and Auction House readiness. Repeated clicks cannot create overlapping requests.
- Summaries show scan age and explain missing or insufficient data. Failed refreshes clearly distinguish previous observations.
- Each historical comparison checks its own data requirements.
- Widened the price column for coin icons and improved summary wrapping above the detailed statistics.
- Exact copper prices and fractional historical medians are preserved. Missing prices never become zero.

### Existing data
- Existing market history and settings are preserved; no reset or migration is required.
- Statistical formulas, thresholds, and history retention are unchanged.
- No automated buying, selling, or posting.