Reorganise by feature, rename to Novelly, add Aspire and a pre-push hook

The layered split into Domain/Application/Infrastructure/Api was forcing
organisation by layer: adding one capability meant touching four projects and
four folders that each held a slice of it. Those four projects are now one
feature-organised Novelly.Api, where each folder — Projects, Characters,
Chapters, Beats, Scenes, Tags, Agent — holds its entity, DTOs, service and
endpoints together. Common/ holds what genuinely crosses features (the patch
semantics, the two exception types, DraftStatus) and Data/ holds the DbContext
and migrations.

Six .NET projects become five: the three layer projects are gone, and
Novelly.AppHost and Novelly.ServiceDefaults are new.

- Namespaces move from NovelSoftware.* to Novelly.*, including the entity type
  names recorded in the EF model snapshots. The migration ids are untouched, so
  an existing novel.db still migrates cleanly — verified against a fresh file.
- Aspire orchestration mirrors the mic-check setup: the AppHost starts the API
  on :5080 and the Vite dev server on :5173, and the API picks up OpenTelemetry,
  health checks and service discovery from ServiceDefaults. /health and /alive
  now answer in development.
- A Husky pre-push hook runs scripts/ci/prepush.sh: build, test, then a web
  build. The scripts are plain bash so CI can run the same steps.
- The MCP server's env var is now NOVELLY_API_URL.

Verified beyond the build: 44 tests pass, the web client builds, the API was
exercised over curl (project/chapter/beat/tag round trip, tag cross-reference,
503 on the agent without a key while conversation listing still returns 200),
the MCP server was driven over stdio JSON-RPC (26 tools, errors still surface
the API's own message rather than being flattened), and the AppHost was run to
confirm both resources come up and Vite proxies /api through to the API.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S56bfZMGe1hnhpWP4CjjNw

src/Novelly.Api/Chapters/ChapterService.cs

@@ -0,0 +1,107 @@
+using Microsoft.EntityFrameworkCore;
+using Novelly.Api.Common;
+using Novelly.Api.Data;
+using Novelly.Api.Projects;
+using Novelly.Api.Tags;
+
+namespace Novelly.Api.Chapters;
+
+public class ChapterService(INovelDbContext db, TagService tags)
+{
+    public async Task<IReadOnlyList<ChapterSummaryDto>> ListAsync(Guid projectId, CancellationToken ct = default)
+    {
+        var chapters = await db.Chapters
+            .Include(c => c.PovCharacter)
+            .Include(c => c.Beats)
+            .Include(c => c.Scenes)
+            .Include(c => c.Tags)
+            .Where(c => c.ProjectId == projectId)
+            .OrderBy(c => c.Number)
+            .ToListAsync(ct);
+
+        return [.. chapters.Select(c => c.ToSummaryDto())];
+    }
+
+    public async Task<ChapterDto> GetAsync(Guid id, CancellationToken ct = default) =>
+        (await FindAsync(id, ct)).ToDto();
+
+    public async Task<ChapterDto> CreateAsync(Guid projectId, CreateChapterRequest request, CancellationToken ct = default)
+    {
+        if (!await db.Projects.AnyAsync(p => p.Id == projectId, ct))
+        {
+            throw new NotFoundException(nameof(Project), projectId);
+        }
+
+        var chapter = new Chapter
+        {
+            ProjectId = projectId,
+            Title = request.Title,
+            Number = request.Number ?? await NextChapterNumberAsync(projectId, ct),
+            Summary = request.Summary,
+            PovCharacterId = request.PovCharacterId,
+            Setting = request.Setting,
+            Notes = request.Notes,
+            Status = request.Status,
+            TargetWordCount = request.TargetWordCount
+        };
+
+        if (request.Tags is { } names)
+        {
+            chapter.Tags = await tags.ResolveAsync(projectId, names, ct);
+        }
+
+        db.Chapters.Add(chapter);
+        await db.SaveChangesAsync(ct);
+        return (await FindAsync(chapter.Id, ct)).ToDto();
+    }
+
+    public async Task<ChapterDto> UpdateAsync(Guid id, UpdateChapterRequest request, CancellationToken ct = default)
+    {
+        var chapter = await FindAsync(id, ct);
+
+        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.PovCharacterId = request.PovCharacterId ?? chapter.PovCharacterId;
+        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;
+        chapter.UpdatedAt = DateTimeOffset.UtcNow;
+
+        if (request.Tags is { } names)
+        {
+            chapter.Tags = await tags.ResolveAsync(chapter.ProjectId, names, ct);
+        }
+
+        await db.SaveChangesAsync(ct);
+        return (await FindAsync(id, ct)).ToDto();
+    }
+
+    public async Task DeleteAsync(Guid id, CancellationToken ct = default)
+    {
+        var chapter = await FindAsync(id, ct);
+        db.Chapters.Remove(chapter);
+        await db.SaveChangesAsync(ct);
+    }
+
+    private async Task<int> NextChapterNumberAsync(Guid projectId, CancellationToken ct)
+    {
+        var max = await db.Chapters
+            .Where(c => c.ProjectId == projectId)
+            .MaxAsync(c => (int?)c.Number, ct);
+
+        return (max ?? 0) + 1;
+    }
+
+    private async Task<Chapter> FindAsync(Guid id, CancellationToken ct) =>
+        await db.Chapters
+            .Include(c => c.PovCharacter)
+            .Include(c => c.Beats).ThenInclude(b => b.Character)
+            .Include(c => c.Beats).ThenInclude(b => b.Scene)
+            .Include(c => c.Beats).ThenInclude(b => b.Tags)
+            .Include(c => c.Scenes).ThenInclude(s => s.PovCharacter)
+            .Include(c => c.Tags)
+            .FirstOrDefaultAsync(c => c.Id == id, ct)
+        ?? throw new NotFoundException(nameof(Chapter), id);
+}