Replace chapter setting with multi-select locations; add chapter character summary

Chapters now carry many Locations (new Tags-style entity with cross-referencing)
instead of a single free-text Setting field, with a Locations tab on the novel
for browsing them and seeing every chapter set at each one. Also surfaces the
distinct characters appearing in a chapter's beats, linked, under the beat/word
count on the outline tab.

src/Novelly.Api/Chapters/ChapterService.cs

@@ -2,6 +2,7 @@ using Microsoft.EntityFrameworkCore;
 using Novelly.Api.Common;
 using Novelly.Api.Common.Validation;
 using Novelly.Api.Data;
+using Novelly.Api.Locations;
 using Novelly.Api.Tags;
 using Novelly.Api.Users;
 
@@ -11,6 +12,7 @@ public class ChapterService(
     INovelDbContext db,
     NovelAccessService access,
     TagService tags,
+    LocationService locations,
     ILogger<ChapterService> logger,
     IModelValidator<CreateChapterRequest> createValidator,
     IModelValidator<UpdateChapterRequest> updateValidator)
@@ -26,6 +28,7 @@ public class ChapterService(
         return await db.Chapters
             .Include(c => c.Beats)
             .Include(c => c.Tags)
+            .Include(c => c.Locations)
             .Where(c => c.NovelId == novelId)
             .OrderBy(c => c.Number)
             .ToListAsync(ct);
@@ -69,7 +72,6 @@ public class ChapterService(
             Title = request.Title,
             Number = request.Number ?? await NextChapterNumberAsync(novelId, ct),
             Summary = request.Summary,
-            Setting = request.Setting,
             Notes = request.Notes,
             Status = request.Status,
             TargetWordCount = request.TargetWordCount,
@@ -82,6 +84,11 @@ public class ChapterService(
             chapter.Tags = await tags.ResolveAsync(novelId, names, ct);
         }
 
+        if (request.Locations is { } locationNames)
+        {
+            chapter.Locations = await locations.ResolveAsync(novelId, locationNames, ct);
+        }
+
         db.Chapters.Add(chapter);
         await db.SaveChangesAsync(ct);
 
@@ -107,7 +114,6 @@ public class ChapterService(
         chapter.Title = Patch.Apply(chapter.Title, request.Title) ?? chapter.Title;
         chapter.Number = request.Number ?? chapter.Number;
         chapter.Summary = Patch.Apply(chapter.Summary, request.Summary);
-        chapter.Setting = Patch.Apply(chapter.Setting, request.Setting);
         chapter.Notes = Patch.Apply(chapter.Notes, request.Notes);
         chapter.Status = request.Status ?? chapter.Status;
         chapter.TargetWordCount = request.TargetWordCount ?? chapter.TargetWordCount;
@@ -125,6 +131,11 @@ public class ChapterService(
             chapter.Tags = await tags.ResolveAsync(chapter.NovelId, names, ct);
         }
 
+        if (request.Locations is { } locationNames)
+        {
+            chapter.Locations = await locations.ResolveAsync(chapter.NovelId, locationNames, ct);
+        }
+
         await db.SaveChangesAsync(ct);
         return (await FindAsync(id, ct))!;
     }
@@ -169,6 +180,7 @@ public class ChapterService(
             .Include(c => c.Beats).ThenInclude(b => b.Characters)
             .Include(c => c.Beats).ThenInclude(b => b.Tags)
             .Include(c => c.Tags)
+            .Include(c => c.Locations)
             .FirstOrDefaultAsync(c => c.Id == id, ct);
 
         if (chapter is null)