Add multiplayer bots, typing languages, and rework the UI layout

Multiplayer
- Quick match: POST /api/multiplayer/quickmatch returns whichever room is
  still filling, or opens one. Players never see a room code; joining by
  code stays for racing specific people.
- Bots fill quick-match rooms after a short wait so a new game is never an
  empty lobby. They only ever join quick-match rooms, never a room opened
  by code. One or two per room, drawn from separate ~40 and ~80 WPM tiers so
  two bots are never near each other's pace, and they stall to correct
  mistakes rather than typing a clean straight line.
- Live player count via GET /api/multiplayer/online, shown on the
  Multiplayer control and under the main menu's Multiplayer button.
- Per-racer colours: you are the theme accent, opponents take distinct hues
  that stay the same from lobby to race.
- The countdown no longer holds the room lock for its full three seconds,
  which is what reset clients mid-countdown.

Typing languages
- 16 languages for the generated-word modes, each with its own
  high-frequency vocabulary rather than a translation of the English list.
- Picker in the top-right rail; non-English uses its own list at every
  difficulty tier instead of falling back to English words.

Fix UTF-8 accuracy in the game core
- update_game_state mixed byte and character counts: total_characters_typed
  accumulated byte-length deltas while total_correct_characters compared a
  char index against that byte count. Equal on ASCII, so it went unnoticed;
  a correctly typed Spanish passage scored 6%. The old byte slicing would
  also have panicked if an index landed inside a multi-byte character.
  Rewritten char-based, with regression tests.

Programming mode
- Replaced prose about programming with real code: 26 syntax-highlighted
  snippets across JavaScript, Python, Rust, C/Go/Java and shell. Single-line
  by necessity, since the typing input is a single-line field.

Layout and readability
- One icon rail arrangement on every screen: Settings/Store under the
  wordmark, Language/Theme/Friends/Account top-right, Stats/Leaderboard/
  Multiplayer bottom-right.
- Main menu: mode picker moved out of the Single Player button, which it was
  notching a divider through and pushing the label off-centre.
- Escape returns to the menu, closing any open popover first, and confirms
  before abandoning a live race.
- Split --text-color and --sub-color per theme; they shared one value that
  measured 3.65:1 against the background, below the 4.5:1 body-text floor.
- Semantic colours used in exactly one place each: gold for a personal best,
  amber for the race countdown and the mobile-result badge.
- Passage now sits in the same place on the typing and end screens, and its
  column is a whole number of characters wide so wrapping cannot leave a
  permanent gap on the right.
- End screen: keystrokes and a correct/wrong/extra/missed split, attribution
  carried over from the typing screen, and a graph with a separate error
  axis, axis titles including seconds, and smoothed lines.

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diff --git a/checklist.md b/checklist.md
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+# TyperPunk Project Checklist
+
+## Directory Structure
+```
+typerpunk/
+├── Cargo.toml                 # Main workspace configuration
+├── Cargo.lock                 # Dependency lock file
+├── install.sh                 # Installation script
+├── README.md                  # Project documentation
+├── LICENSE                    # License file
+├── .gitignore                 # Git ignore rules
+├── .gitattributes            # Git attributes
+├── texts.txt                  # Sample typing texts
+├── sentences.txt             # Sample sentences
+├── config.json               # Configuration file
+├── crates/                   # Crate modules
+│   ├── core/                # Core functionality
+│   │   ├── Cargo.toml      # Core crate configuration
+│   │   └── src/            # Core source code
+│   │       ├── app.rs      # Application state management
+│   │       ├── config.rs   # Configuration management
+│   │       ├── input.rs    # Input handling
+│   │       ├── stats.rs    # Statistics tracking
+│   │       ├── text.rs     # Text management
+│   │       ├── theme.rs    # Theme management
+│   │       └── ui.rs       # User interface
+│   └── tui/                 # Terminal UI
+│       ├── Cargo.toml      # TUI crate configuration
+│       └── src/            # TUI source code
+│           └── main.rs     # TUI entry point
+├── target/                   # Build output directory
+├── web/                     # web interface for typerpunk.com
+└── original_working_tui_code/ # Reference implementation
+```
+
+## Project Status
+
+### Core Features
+- [x] Basic typing test functionality
+- [x] WPM calculation
+- [x] Accuracy tracking
+- [x] Time tracking
+- [x] Error highlighting
+- [x] Multiple text support
+- [x] Theme system
+- [x] Configuration management
+
+### Game Modes
+- [x] Normal mode (singe player)
+- [ ] Programming mode
+- [ ] Security mode
+- [ ] Multiplayer mode
+
+### tui
+- [x] Normal mode
+- [x] stats
+- [] 
+- [] 
+- [] 
+
+### web
+- [] normal mode
+- [ ] Programming mode
+- [ ] Security mode
+- [ ] Multiplayer mode
+- [] stats
+- [ ] 
+- [ ]
+
+### UI/UX
+- [x] Terminal UI
+- [ ] Web interface
+- [x] Theme customization
+- [x] Responsive design
+- [x] Keyboard shortcuts
+- [x] Progress indicators
+- [x] Statistics display
+
+### Multiplayer
+- [ ] Real-time competition
+- [ ] Leaderboards
+- [ ] User profiles
+- [ ] Matchmaking
+- [ ] Chat system
+
+### Configuration
+- [x] User preferences
+- [x] Theme settings
+- [ ] Game mode settings
+- [ ] Multiplayer settings
+- [ ] Key bindings
+
+### Build & Deployment
+- [x] Cross-platform support
+- [ ] WebAssembly build
+- [x] Installation script
+- [ ] CI/CD pipeline
+- [x] Documentation
+
+### Testing
+- [ ] Unit tests
+- [ ] Integration tests
+- [ ] Performance tests
+- [ ] UI tests
+- [ ] Multiplayer tests
+
+## Common Core Features
+- [x] Basic typing mechanics
+- [x] Text loading and management
+- [x] Statistics tracking
+  - [x] WPM calculation
+  - [x] Accuracy tracking
+  - [x] Error counting
+- [x] Theme management
+- [x] Configuration system
+- [x] Basic game modes
+  - [x] Normal mode
+
+
+## TUI Features (Keep Simple)
+- [x] Terminal-based interface
+- [x] Real-time typing feedback
+- [x] Color-coded character matching
+- [x] Basic statistics display
+  - [x] Current WPM
+  - [x] Time elapsed
+  - [x] Accuracy
+- [x] Simple menu system
+- [x] Local configuration
+- [x] Original UI layout
+- [x] Stats updating without input
+
+## Future Web Features (Separate Development)
+- [ ] Web interface
+- [ ] WebSocket-based multiplayer
+- [ ] Real-time opponent tracking
+- [ ] Web-based configuration
+- [ ] Custom themes
+- [ ] Advanced game modes
+  - [ ] Programming mode
+  - [ ] Security mode
+  - [ ] Custom mode
+  - [ ] Multiplayer mode
+- [ ] Quote mode with different lengths
+- [ ] Topic-based challenges
+- [ ] Difficulty levels
+- [ ] Guest mode support
+
+## Dependencies
+
+### Common Dependencies (Current)
+- [x] serde = "1.0"
+- [x] serde_json = "1.0"
+- [x] anyhow = "1.0"
+- [x] thiserror = "1.0"
+- [x] config = "0.13"
+- [x] dirs = "5.0"
+- [x] rlua = "0.19"
+- [x] rand = "0.8"
+
+### TUI Dependencies (Current)
+- [x] crossterm = "0.27"
+- [x] ratatui = "0.24"
+
+### Web Dependencies (Future)
+- [ ] wasm-bindgen = "0.2"
+- [ ] web-sys = "0.3"
+- [ ] js-sys = "0.3"
+- [ ] tokio-tungstenite = "0.20"
+- [ ] futures-util = "0.3"
+
+## Build Instructions
+
+### Current
+- [x] Install Rust
+- [x] Build TUI version
+- [x] Basic install script
+
+### Future
+- [ ] Web build setup
+- [ ] Development server
+- [ ] Production deployment
+- [ ] Cross-platform installers 
+
+# TyperPunk Fix Checklist
+
+## Text Display and Cursor Issues
+- [x] Fix cursor making characters invisible/overwriting them
+- [x] Fix cursor not following properly to next lines
+- [x] Fix text wrapping problems causing words to shift up unexpectedly
+- [x] Fix space handling logic for incorrect inputs
+
+## End Screen Problems
+- [x] Remove unwanted green backgrounds from stats
+- [x] Add hover functionality to graph to show WPM/raw values
+- [x] Fix stats and content fitting on one screen
+- [x] Add TyperPunk logo to top left
+- [x] Fix time not restarting when clicking "Play Again"
+
+## Layout and Styling Issues
+- [ ] Remove unnecessary border from theme toggle button
+- [ ] Fix time stat sometimes being out of view
+- [ ] Remove unwanted scrollbar
+- [ ] Improve mobile responsiveness
+- [x] Move WPM and ACC stats to extreme sides in game state
+- [x] Fix end screen stats layout:
+  - [x] Keep WPM in same position as game state
+  - [x] Replace ACC with errors in same position
+  - [x] Center graph between stats
+  - [x] Keep time in same position
+- [x] Fix raw WPM calculation to show peak typing speed
+- [x] Fix text display issues:
+  - [x] Prevent word breaking across lines
+  - [x] Fix left alignment
+  - [x] Center text container properly in x-axis
+
+## Implementation Notes
+
+### Text Display and Cursor Issues
+- Cursor visibility is controlled by CSS in `.text-display span.current::after`
+- Text wrapping is handled in `.text-display` class with `white-space: pre-wrap`
+- Space handling logic is in `TypingGame.tsx` renderText function
+
+### End Screen Improvements
+- Stats styling is in `.end-screen-stat` classes
+- Graph hover functionality needs to be added to `.graph-container`
+- Layout is controlled by `.end-screen` and `.end-screen-stats` classes
+- Logo placement is in `.logo` class
+
+### Layout and Styling
+- Theme toggle styling is in `.theme-toggle` class
+- Time stat positioning is in `.time-stat` class
+- Scrollbar and mobile responsiveness are in media queries
+
+### Stats Layout
+- WPM and ACC stats should be at extreme edges of the screen
+- End screen should maintain same positions as game state
+- Graph should be centered between stats
+
+### Raw WPM Calculation
+- Should show peak typing speed
+- Graph should show speed variations over time
+- Current implementation incorrectly uses total chars instead of peak speed
+
+### Text Display
+- Words should not break across lines
+- Text container needs proper x-axis centering
+- Left alignment needs adjustment
+
+## Progress Tracking
+- [x] Phase 1: Text Display and Cursor Issues
+- [ ] Phase 2: End Screen Problems
+- [ ] Phase 3: Layout and Styling Issues 
+
+## UI/Gameplay Improvements
+- [ ] Prevent backspace on correct characters (except for ctrl+backspace for word deletion)
+- [ ] Fix/prevent reset accuracy to 100% when correcting misspellings
+- [ ] Other theme toggle button in top right corner
+- [ ] Reposition text/typing paragraph to north position
+- [ ] Add empty space below typing area for future game modes
+- [ ] In endscreen:
+  - [ ] Replace empty space with graph
+  - [ ] Keep text visible at top
+  - [ ] Position WPM on left side of graph
+  - [ ] Position errors on right side of graph
+  - [ ] Position time at bottom
+  - [ ] Add graph axes with:
+    - [ ] 0 in bottom left corner
+    - [ ] WPM on y-axis
+    - [ ] Time in whole seconds on x-axis
+- [ ] Fix raw WPM calculation (different from regular WPM)
+- [ ] Update end screen buttons to match main menu button style (border/colors) 
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