Simple Challenge Roulette

- "Statistics" button on the main menu — opens the stats screen directly from TitleScreen.

- Fixed win farming: re-entering a completed world no longer re-triggers VictoryScreen or awards extra wins.

- New Hell modifier: "Chunk Eater" — every 30–90 seconds a random chunk near you is destroyed down to bedrock.

- New Extreme modifier: "Random Drops" — breaking any block drops a completely random item instead. Configurable drop count, enchant chance, and max enchant level. Supports items from any mod.

- `/challenge` command for servers and LAN — manage challenges via chat: `/challenge start <item> <race> <mod> [mod2]`, `item`, `modifier`, `race`, `stop`, `status`, `wins`. The `start` subcommand accepts item, race mode (true/false), and modifier(s) in one call with auto-complete and tooltips. Requires operator rights. Localized in all 6 languages.

- New Extreme modifier: "Hidden Enemies" — hostile mobs are invisible until they attack the player. Configurable visibility linger duration after attacking.

- Blacklist in config — two new categories: "Blacklist — Items" and "Blacklist — Modifiers". Click an icon to block/unblock an item or modifier. The blacklist is saved to config/challengeroulette/blacklist.json. Blacklisted items and modifiers are excluded from roulettes and manual selection.

- To start a challenge properly with `/challenge start`, first run `/challenge stop` to reset any previous session.

- Progression: added Easy Modifier and Medium Modifier Unlock Wins config options; removed separate special values for inverted_controls and vampirism.

- Timer config — completely revamped: interactive preview with drag-and-drop. Drag the timer with your mouse to any screen position. All individual settings (position, scale, color, format) have been removed from the codebase.

- Separate panel and timer dragging — in themes with a separate floating timer (CLASSIC, GLOW, PIXEL, RETRO, THERMAL), the main panel (item + modifiers) and the timer can be dragged independently. Each element has its own highlight color (yellow = timer, blue = panel). In combined themes (SLIM, MINIMAL), the whole panel is dragged together.

- HUD position is configurable via the config screen.

- Overhauled item and modifier manual selection screens:

  - Section-by-section rendering with rarity/difficulty headers inside the scrollable grid.

  - Dynamic top header showing the current visible section.

  - Search bar with smooth fade-in animation.

  - Animated entrance (slide-up) for grid cells.

  - Running-light border around the grid.

  - Improved tooltips with item/modifier details.

  - Fixed: sticky header now correctly shows the section at the top (numerical scrollOffset computation).

  - Fixed: clicking after scrolling now selects the correct item/modifier.

  - Fixed: tooltip name colors now match the rarity/difficulty color.

  - Fixed: first in-grid header no longer duplicates the static header.