Initial commit: RR3 Community Server with web admin panel

- ASP.NET Core 8 REST API server
- 12 API endpoints matching EA Synergy protocol
- SQLite database with Entity Framework Core
- Web admin panel with Bootstrap 5
- User, Catalog, Session, Purchase management
- Comprehensive documentation

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/Pages/Settings.cshtml.cs

@@ -0,0 +1,74 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.EntityFrameworkCore;
+using RR3CommunityServer.Data;
+
+namespace RR3CommunityServer.Pages;
+
+public class SettingsModel : PageModel
+{
+    private readonly RR3DbContext _context;
+
+    public SettingsModel(RR3DbContext context)
+    {
+        _context = context;
+    }
+
+    public string ServerUrl { get; set; } = string.Empty;
+    public string Platform { get; set; } = string.Empty;
+    public string DotNetVersion { get; set; } = string.Empty;
+    public string AspNetVersion { get; set; } = string.Empty;
+    public string Uptime { get; set; } = string.Empty;
+    public int ProcessId { get; set; }
+    public long MemoryUsage { get; set; }
+    public DatabaseStats DbStats { get; set; } = new();
+
+    public async Task OnGetAsync()
+    {
+        ServerUrl = $"{Request.Scheme}://{Request.Host}";
+        Platform = Environment.OSVersion.ToString();
+        DotNetVersion = Environment.Version.ToString();
+        AspNetVersion = typeof(IApplicationBuilder).Assembly.GetName().Version?.ToString() ?? "Unknown";
+        
+        var process = System.Diagnostics.Process.GetCurrentProcess();
+        var uptime = DateTime.UtcNow - process.StartTime.ToUniversalTime();
+        Uptime = $"{uptime.Days}d {uptime.Hours}h {uptime.Minutes}m {uptime.Seconds}s";
+        ProcessId = process.Id;
+        MemoryUsage = process.WorkingSet64 / 1024 / 1024; // Convert to MB
+
+        // Get database stats
+        DbStats = new DatabaseStats
+        {
+            Users = await _context.Users.CountAsync(),
+            Devices = await _context.Devices.CountAsync(),
+            Sessions = await _context.Sessions.CountAsync(),
+            Purchases = await _context.Purchases.CountAsync()
+        };
+    }
+
+    public async Task<IActionResult> OnPostResetDatabaseAsync()
+    {
+        // Delete all data
+        _context.Purchases.RemoveRange(_context.Purchases);
+        _context.Sessions.RemoveRange(_context.Sessions);
+        _context.Users.RemoveRange(_context.Users);
+        _context.Devices.RemoveRange(_context.Devices);
+        _context.CatalogItems.RemoveRange(_context.CatalogItems);
+
+        await _context.SaveChangesAsync();
+
+        // Re-seed catalog
+        await _context.Database.EnsureDeletedAsync();
+        await _context.Database.EnsureCreatedAsync();
+
+        return RedirectToPage();
+    }
+}
+
+public class DatabaseStats
+{
+    public int Users { get; set; }
+    public int Devices { get; set; }
+    public int Sessions { get; set; }
+    public int Purchases { get; set; }
+}