Transform Ruby Kingdom into a full-featured text RPG with local save system

[Copilot]

Overview

This PR completely transforms Ruby Kingdom from a simple proof-of-concept into a comprehensive text-based RPG experience. The main goal was to remove Firebase authentication and replace it with a local save system while adding typical text adventure game features and expanding the Ruby Kingdom lore.

🔥 Major Changes

Removed Firebase Authentication

• Eliminated bcrypt dependency and Firebase integration
• Removed login/signup system entirely
• Replaced with local JSON-based save system

Local Save System

• Unlimited save slots with custom naming support
• Complete character persistence - saves all stats, inventory, location, and progress
• Save management UI - load, delete, and create saves from main menu
• Auto-generated save names with timestamps
• Saves stored locally in saves/ directory as JSON files

Quest System

• Starter quests automatically given to new characters
• Multiple quest types: kill enemies, explore locations, find special areas
• Quest tracking with progress indicators (e.g., "Explorer [2/3]")
• Reward system with gold and experience
• Accessible quest log during gameplay

Enhanced Exploration & Lore

• Rich location descriptions with Ruby Kingdom mythology
• 9 unique biomes with magical themes (Ruby Forest, Crystal Lake, Ancient Ruins, etc.)
• Visual world map showing player position on 3x3 grid
• Location tracking for quest progression
• Added emojis and atmospheric storytelling throughout

Improved Combat & Shop

• Enhanced battle feedback with better descriptions and quest integration
• Ruby Kingdom Blacksmith with immersive dialogue and lore
• 6 item categories: Weapons, potions, shields, magical upgrades
• Stat progression through combat victories and item purchases
• Balanced economy with meaningful upgrade paths

🎮 Gameplay Features

Before vs After

Before: Simple combat loop with basic character creation and hardcoded authentication
After: Full RPG experience with quests, exploration, character progression, save management, and rich storytelling

New Player Experience

1. Main Menu - Choose to load saves, create new character, or manage saves
2. Character Creation - Enhanced with Ruby Kingdom lore and class descriptions
3. Tutorial Quests - Automatic starter quests guide new players
4. Rich Exploration - Discover magical locations with detailed descriptions
5. Progression Systems - Level up, complete quests, purchase upgrades

🛠 Technical Implementation

Architecture Improvements

• Modular quest system (quest_system.rb) with extensible quest types
• Comprehensive save system (save_system.rb) with error handling
• Enhanced main menu (main_menu.rb) replacing auth flow
• Location tracking integrated into map system for quest progress

Code Quality

• Maintained existing code structure while removing deprecated auth system
• Added proper error handling for save/load operations
• Improved character stat management and progression
• Enhanced user experience with better input validation

🎯 Ruby Kingdom Theme

Expanded the Ruby Kingdom lore throughout:

• Ruby Heart - The source of all magic in the kingdom
• Ruby Castle - The legendary destination players seek
• Magical locations - Each area tells part of the kingdom's story
• Ruby-infused items - Weapons and potions powered by the kingdom's magic
• Crystal formations - Mystical elements that tie the world together

Example Usage

# Start the game
ruby main.rb

# Main menu shows save management
=== RUBY KINGDOM - SAVE MANAGER ===
Saved Games:
1. hero_adventure (Hero, Level 3) - 2025-08-09 15:30
2. mage_quest (Gandalf, Level 5) - 2025-08-08 20:15

# In-game quest tracking
=== QUEST LOG ===
Active Quests:
  1. First Blood [1/1] ✓ COMPLETE
  2. Explorer [2/3]
     Visit 3 different locations
  3. Collector [0/1]
     Find the Ruby Castle

This transformation maintains the original Ruby Kingdom charm while adding the depth and features users expect from a modern text-based RPG. The local save system ensures players can enjoy unlimited saves without any external dependencies.

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