feat: add series support for books and games (#54)

Implements series grouping functionality for books and games to allow
tracking franchises and related items.

Database changes:
- Add series (optional string) and seriesOrder (optional number) fields to Book model
- Add series (optional string) and seriesOrder (optional number) fields to Game model

Backend changes:
- Add GET /books/series/:seriesName endpoint to fetch all books in a series
- Add GET /games/series/:seriesName endpoint to fetch all games in a series
- Add getBooksBySeries() method to BookService (orders by seriesOrder asc)
- Add getGamesBySeries() method to GameService (orders by seriesOrder asc)
- Create/Update endpoints automatically handle series fields via DTOs

Frontend changes:
- Add series and seriesOrder input fields to "Add New Book" form
- Add series and seriesOrder input fields to "Edit Book" form
- Add series and seriesOrder input fields to "Add New Game" form
- Add series and seriesOrder input fields to "Edit Game" form

Type definitions:
- Update Book and CreateBookDto interfaces with series fields
- Update Game and CreateGameDto interfaces with series fields

Closes #54

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

api/prisma/schema.prisma

@@ -32,6 +32,8 @@ model Game {
   coverImage   String?
   tags         String[]
   links        Link[]
+  series       String?
+  seriesOrder  Int?      @db.Int
   createdAt    DateTime  @default(now())
   updatedAt    DateTime  @updatedAt
   comments     Comment[]
@@ -58,6 +60,8 @@ model Book {
   coverImage   String?
   tags         String[]
   links        Link[]
+  series       String?
+  seriesOrder  Int?      @db.Int
   createdAt    DateTime  @default(now())
   updatedAt    DateTime  @updatedAt
   comments     Comment[]

api/src/app/routes/books/index.ts

@@ -24,6 +24,17 @@ const booksRoutes: FastifyPluginAsync = async (app) => {
     return bookService.getAllBooks();
   });
 
+  /**
+   * Get all books in a series (public route).
+   */
+  app.get<{ Params: { seriesName: string }; Reply: Book[] }>(
+    "/series/:seriesName",
+    async (request) => {
+      const { seriesName } = request.params;
+      return bookService.getBooksBySeries(seriesName);
+    }
+  );
+
   /**
    * Get single book by ID (public route).
    */

api/src/app/routes/games/index.ts

@@ -22,6 +22,15 @@ const gamesRoutes: FastifyPluginAsync = async (app) => {
     return gameService.getAllGames();
   });
 
+  // Get all games in a series (public route)
+  app.get<{ Params: { seriesName: string }; Reply: Game[] }>(
+    "/series/:seriesName",
+    async (request) => {
+      const { seriesName } = request.params;
+      return gameService.getGamesBySeries(seriesName);
+    }
+  );
+
   // Get single game (public route)
   app.get<{ Params: { id: string }; Reply: Game | null }>(
     "/:id",

api/src/app/services/book.service.ts

@@ -56,6 +56,28 @@ export class BookService {
     };
   }
 
+  /**
+   * Get all books in a series, ordered by seriesOrder.
+   */
+  async getBooksBySeries(seriesName: string): Promise<Book[]> {
+    const books = await this.prisma.book.findMany({
+      where: { series: seriesName },
+      orderBy: { seriesOrder: "asc" },
+    });
+
+    return books.map((book) => ({
+      ...book,
+      status: book.status as unknown as BookStatus,
+      dateAdded: book.dateAdded,
+      dateStarted: book.dateStarted || undefined,
+      dateFinished: book.dateFinished || undefined,
+      tags: book.tags ?? [],
+      links: book.links ?? [],
+      createdAt: book.createdAt,
+      updatedAt: book.updatedAt,
+    }));
+  }
+
   /**
    * Create new book.
    */

api/src/app/services/game.service.ts

@@ -58,6 +58,29 @@ export class GameService {
     };
   }
 
+  /**
+   * Get all games in a series, ordered by seriesOrder.
+   */
+  async getGamesBySeries(seriesName: string): Promise<Game[]> {
+    const games = await this.prisma.game.findMany({
+      where: { series: seriesName },
+      orderBy: { seriesOrder: "asc" },
+    });
+
+    return games.map((game) => ({
+      ...game,
+      status: game.status as unknown as GameStatus,
+      dateAdded: game.dateAdded,
+      dateStarted: game.dateStarted || undefined,
+      dateCompleted: game.dateCompleted || undefined,
+      dateFinished: game.dateFinished || undefined,
+      tags: game.tags ?? [],
+      links: game.links ?? [],
+      createdAt: game.createdAt,
+      updatedAt: game.updatedAt,
+    }));
+  }
+
   /**
    * Create new game.
    */