feat: add a Tools page printer for note merge and print presets

Chapter officers can merge a markdown note onto filtered students, teams, or events and save the recipe. Extra student-note columns are additional fields (any ## … fields heading) so they work as print tokens whether imported or typed by hand.

Co-authored-by: Cursor <cursoragent@cursor.com>

WebApp/Services/PrintPresetService.cs

@@ -0,0 +1,97 @@
+using Core.Entities;
+using Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace WebApp.Services;
+
+public class PrintPresetService : IPrintPresetService
+{
+    private readonly AppDbContext _context;
+    private readonly ILogger<PrintPresetService> _logger;
+
+    public PrintPresetService(AppDbContext context, ILogger<PrintPresetService> logger)
+    {
+        _context = context;
+        _logger = logger;
+    }
+
+    public async Task<IReadOnlyList<PrintPreset>> GetAllAsync(CancellationToken cancellationToken = default)
+    {
+        return await _context.PrintPresets
+            .AsNoTracking()
+            .Include(p => p.Note)
+            .OrderBy(p => p.Name)
+            .ToListAsync(cancellationToken);
+    }
+
+    public async Task<PrintPreset?> GetAsync(int id, CancellationToken cancellationToken = default)
+    {
+        return await _context.PrintPresets
+            .AsNoTracking()
+            .Include(p => p.Note)
+            .FirstOrDefaultAsync(p => p.Id == id, cancellationToken);
+    }
+
+    public async Task<bool> NameExistsAsync(
+        string name,
+        int? excludeId = null,
+        CancellationToken cancellationToken = default)
+    {
+        var trimmed = name.Trim();
+        var query = _context.PrintPresets.AsNoTracking().Where(p => p.Name == trimmed);
+        if (excludeId.HasValue)
+            query = query.Where(p => p.Id != excludeId.Value);
+        return await query.AnyAsync(cancellationToken);
+    }
+
+    public async Task<PrintPreset> CreateAsync(PrintPreset preset, CancellationToken cancellationToken = default)
+    {
+        preset.Name = preset.Name.Trim();
+        preset.UpdatedAt = DateTime.UtcNow;
+        preset.Note = null!;
+
+        if (await NameExistsAsync(preset.Name, null, cancellationToken))
+            throw new InvalidOperationException($"A print preset named '{preset.Name}' already exists.");
+
+        _context.PrintPresets.Add(preset);
+        await _context.SaveChangesAsync(cancellationToken);
+        _logger.LogInformation("Print preset created: {PresetId} {Name}", preset.Id, preset.Name);
+        return preset;
+    }
+
+    public async Task<PrintPreset> UpdateAsync(PrintPreset preset, CancellationToken cancellationToken = default)
+    {
+        var existing = await _context.PrintPresets
+            .FirstOrDefaultAsync(p => p.Id == preset.Id, cancellationToken);
+
+        if (existing is null)
+            throw new InvalidOperationException($"Print preset {preset.Id} was not found.");
+
+        var name = preset.Name.Trim();
+        if (await NameExistsAsync(name, preset.Id, cancellationToken))
+            throw new InvalidOperationException($"A print preset named '{name}' already exists.");
+
+        existing.Name = name;
+        existing.NoteId = preset.NoteId;
+        existing.EntityType = preset.EntityType;
+        existing.FiltersJson = preset.FiltersJson;
+        existing.UpdatedAt = DateTime.UtcNow;
+
+        await _context.SaveChangesAsync(cancellationToken);
+        _logger.LogInformation("Print preset updated: {PresetId} {Name}", existing.Id, existing.Name);
+        return existing;
+    }
+
+    public async Task DeleteAsync(int id, CancellationToken cancellationToken = default)
+    {
+        var existing = await _context.PrintPresets
+            .FirstOrDefaultAsync(p => p.Id == id, cancellationToken);
+
+        if (existing is null)
+            return;
+
+        _context.PrintPresets.Remove(existing);
+        await _context.SaveChangesAsync(cancellationToken);
+        _logger.LogInformation("Print preset deleted: {PresetId} {Name}", id, existing.Name);
+    }
+}