Remove Scenes, group beats by multiple characters; strip comments repo-wide

Drop the Scene entity/grouping in favor of chapters carrying prose directly
and beats belonging to many characters. Add markdown editor + character
multi-select components to the web client. Remove all XML doc and inline
comments across the touched C#/TS/CSS files in favor of self-documenting
names, and record that convention in CLAUDE.md. Add .mcp.json (local MCP
server config, no secrets) and ignore .idea/.

src/Novelly.Api/Program.cs

@@ -10,14 +10,11 @@ using Novelly.Api.Data;
 using Novelly.Api.Imports;
 using Novelly.Api.Projects;
 using Novelly.Api.Questions;
-using Novelly.Api.Scenes;
 using Novelly.Api.Tags;
 using Serilog;
 
 var builder = WebApplication.CreateBuilder(args);
 
-// AddSerilog (not UseSerilog) so it becomes an additional logging provider rather than
-// replacing the one AddServiceDefaults wires up for the Aspire dashboard.
 builder.Services.AddSerilog((services, config) => config
     .ReadFrom.Configuration(builder.Configuration)
     .ReadFrom.Services(services)
@@ -28,8 +25,6 @@ builder.Services.AddNovelly(builder.Configuration);
 builder.Services.AddOpenApi();
 builder.Services.AddProblemDetails();
 
-// Enums travel as their names, so the React client and the MCP server both read
-// "Protagonist" rather than an ordinal that shifts whenever the enum is reordered.
 builder.Services.ConfigureHttpJsonOptions(options =>
     options.SerializerOptions.Converters.Add(new JsonStringEnumConverter()));
 
@@ -43,16 +38,11 @@ builder.Services.AddCors(options => options.AddDefaultPolicy(policy => policy
 
 var app = builder.Build();
 
-// Local-first tool: bring the SQLite file up to date on boot rather than making the
-// writer run a migration command before they can open the app.
 using (var scope = app.Services.CreateScope())
 {
     await scope.ServiceProvider.GetRequiredService<NovelDbContext>().Database.MigrateAsync();
 }
 
-// Serilog's request logging wraps the exception handler (registered first = outermost)
-// so it reads the status code the handler already resolved, rather than seeing the raw
-// exception fly past and misreporting a handled 404 as a 500.
 app.UseSerilogRequestLogging();
 
 app.UseExceptionHandler(handler => handler.Run(async context =>
@@ -95,7 +85,6 @@ app.MapProjectEndpoints()
    .MapCharacterEndpoints()
    .MapChapterEndpoints()
    .MapBeatEndpoints()
-   .MapSceneEndpoints()
    .MapTagEndpoints()
    .MapOpenQuestionEndpoints()
    .MapAgentEndpoints()
@@ -103,5 +92,4 @@ app.MapProjectEndpoints()
 
 app.Run();
 
-/// <summary>Exposed so the tests can spin the API up with WebApplicationFactory.</summary>
 public partial class Program;