feat(home-dialog): IGlobalsRepository.GetActiveHomeDialogsAsync

Window is [begin, end) — exclusive upper bound. Ordered priority-DESC
then Id-ASC so the controller can break on the first match.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.Database/Repositories/Globals/GlobalsRepository.cs

@@ -65,6 +65,13 @@ public class GlobalsRepository : IGlobalsRepository
     public Task<List<BannerEntry>> GetBanners() =>
         _dbContext.Banners.AsNoTracking().OrderBy(b => b.Id).ToListAsync();
 
+    public async Task<IReadOnlyList<HomeDialogEntry>> GetActiveHomeDialogsAsync(DateTime nowUtc) =>
+        await _dbContext.HomeDialogEntries.AsNoTracking()
+            .Where(e => e.BeginTime <= nowUtc && e.EndTime > nowUtc)
+            .OrderByDescending(e => e.Priority)
+            .ThenBy(e => e.Id)
+            .ToListAsync();
+
     public Task<ColosseumConfig?> GetCurrentColosseum() =>
         _dbContext.Colosseums.AsNoTracking().FirstOrDefaultAsync(e => e.Id == 1);