Rename Project concept to Novel across the stack

Renames the domain concept from Project to Novel throughout the backend
(entities, DTOs, services, endpoints, ProjectAccessService/Permission,
ProjectId foreign keys), MCP server (tool names and routes), and the
React/Vite frontend (types, hooks, routes, components). Adds a new EF
Core migration (RenameProjectToNovel) using RenameTable/RenameColumn to
preserve existing data instead of dropping/recreating tables. Updates
CLAUDE.md's structure section to reference Novels/ instead of Projects/.

src/Novelly.Mcp/Tools/ManuscriptTools.cs

@@ -8,12 +8,12 @@ namespace Novelly.Mcp.Tools;
 public static class ManuscriptTools
 {
     [McpServerTool(Name = "list_chapters")]
-    [Description("List a project's chapters in manuscript order, with beat and word counts.")]
+    [Description("List a novel's chapters in manuscript order, with beat and word counts.")]
     public static Task<CallToolResult> ListChapters(
         NovelApiClient api,
-        [Description("The project's id.")] Guid projectId,
+        [Description("The novel's id.")] Guid novelId,
         CancellationToken ct) =>
-        api.GetAsync($"/api/projects/{projectId}/chapters", ct);
+        api.GetAsync($"/api/novels/{novelId}/chapters", ct);
 
     [McpServerTool(Name = "get_chapter")]
     [Description("Read one chapter in full: its outline (beats) and its drafted prose.")]
@@ -24,10 +24,10 @@ public static class ManuscriptTools
         api.GetAsync($"/api/chapters/{chapterId}", ct);
 
     [McpServerTool(Name = "create_chapter")]
-    [Description("Add a chapter to a project. It goes at the end of the manuscript unless you supply a number.")]
+    [Description("Add a chapter to a novel. It goes at the end of the manuscript unless you supply a number.")]
     public static Task<CallToolResult> CreateChapter(
         NovelApiClient api,
-        [Description("The project's id.")] Guid projectId,
+        [Description("The novel's id.")] Guid novelId,
         [Description("Chapter title.")] string title,
         CancellationToken ct,
         [Description("Position in the manuscript, 1-based.")] int? number = null,
@@ -37,7 +37,7 @@ public static class ManuscriptTools
         [Description("Target length in words.")] int? targetWordCount = null,
         [Description("The chapter's drafted text, in markdown, if you are writing it now.")] string? prose = null,
         [Description("Tags for cross-referencing. Unknown tags are created.")] string[]? tags = null) =>
-        api.PostAsync($"/api/projects/{projectId}/chapters", new
+        api.PostAsync($"/api/novels/{novelId}/chapters", new
         {
             title,
             number,