feat: manga metadata with status, authors, genres, tags, and search filters (0.15.0)

Adds first-class manga metadata across the stack:

- **Status** (ongoing / completed), **alternative titles**, normalized
  **multi-author** support, **curated genres** (13 seeded), and
  **free-form user tags** (case-insensitive, globally shared). Each is
  modelled as its own table joined to mangas; `mangas.author` is
  backfilled into `authors` + `manga_authors` and dropped.
- New endpoints: `PATCH /v1/mangas/:id` (three-state `description`),
  `POST/DELETE /v1/mangas/:id/tags[/:tag_id]`, `GET /v1/genres`,
  `GET /v1/tags?search=`.
- `GET /v1/mangas` now returns `MangaCard` (with authors + genres
  batched in) and supports `?status=`, `?author_id=`, `?genre_id=`,
  `?tag_id=` filters — AND across facets, with empty-array no-op
  semantics for the unnest primitive.
- `GET /v1/mangas/:id` returns the enriched `MangaDetail` with tags.
- Frontend: reusable `Chip` component; manga detail page renders
  authors as chips linking to `/authors/:id` (Phase 2), a status
  badge, alt titles, genres, and tags with inline add/remove (only
  the attacher sees remove); upload form supports multi-author /
  multi-genre / alt titles / status; search page gets a collapsible
  URL-synced filter panel with keyboard-navigable tag autocomplete.
- 126 backend tests (incl. AND-across-facets primitive, case-insens
  author/tag de-dup, transactional create rollback, PATCH semantics
  for missing / null / set on description); 72 frontend tests +
  svelte-check clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mangalord-frontend",
-  "version": "0.14.0",
+  "version": "0.15.0",
   "private": true,
   "type": "module",
   "scripts": {

frontend/src/lib/api/client.ts

@@ -65,13 +65,16 @@ export async function request<T>(path: string, init?: RequestInit): Promise<T> {
 export type Manga = {
     id: string;
     title: string;
-    author: string | null;
+    status: MangaStatus;
+    alt_titles: string[];
     description: string | null;
     cover_image_path: string | null;
     created_at: string;
     updated_at: string;
 };
 
+export type MangaStatus = 'ongoing' | 'completed';
+
 export type Page = {
     limit: number;
     offset: number;

frontend/src/lib/api/genres.test.ts

@@ -0,0 +1,33 @@
+import { describe, it, expect, vi, beforeEach, afterEach, type MockInstance } from 'vitest';
+import { listGenres } from './genres';
+
+function ok(body: unknown): Response {
+    return new Response(JSON.stringify(body), {
+        status: 200,
+        headers: { 'content-type': 'application/json' }
+    });
+}
+
+describe('genres api client', () => {
+    let fetchSpy: MockInstance<typeof globalThis.fetch>;
+
+    beforeEach(() => {
+        fetchSpy = vi.spyOn(globalThis, 'fetch');
+    });
+    afterEach(() => {
+        vi.restoreAllMocks();
+    });
+
+    it('listGenres GETs /v1/genres and returns a flat array', async () => {
+        fetchSpy.mockResolvedValueOnce(
+            ok([
+                { id: 'g1', name: 'Action' },
+                { id: 'g2', name: 'Comedy' }
+            ])
+        );
+        const genres = await listGenres();
+        expect(genres.map((g) => g.name)).toEqual(['Action', 'Comedy']);
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/genres$/);
+    });
+});

frontend/src/lib/api/genres.ts

@@ -0,0 +1,9 @@
+import { request } from './client';
+import type { GenreRef } from './mangas';
+
+export type Genre = GenreRef;
+
+/** Returns the full curated genre vocabulary. The list is short, so no pagination. */
+export async function listGenres(): Promise<Genre[]> {
+    return request<Genre[]>('/v1/genres');
+}

frontend/src/lib/api/mangas.test.ts

@@ -1,13 +1,24 @@
 import { describe, it, expect, vi, beforeEach, afterEach, type MockInstance } from 'vitest';
-import { listMangas, createManga, getManga } from './mangas';
+import {
+    listMangas,
+    createManga,
+    getManga,
+    updateManga,
+    attachTag,
+    detachTag
+} from './mangas';
 
-function ok(body: unknown): Response {
+function ok(body: unknown, status = 200): Response {
     return new Response(JSON.stringify(body), {
-        status: 200,
+        status,
         headers: { 'content-type': 'application/json' }
     });
 }
 
+function noContent(): Response {
+    return new Response(null, { status: 204 });
+}
+
 function envelope(status: number, code: string, message: string): Response {
     return new Response(JSON.stringify({ error: { code, message } }), {
         status,
@@ -19,6 +30,30 @@ function emptyPage() {
     return { items: [], page: { limit: 50, offset: 0, total: null } };
 }
 
+function cardFixture(extra: Record<string, unknown> = {}) {
+    return {
+        id: 'b1',
+        title: 'Berserk',
+        status: 'ongoing',
+        alt_titles: [],
+        description: null,
+        cover_image_path: null,
+        created_at: '2026-01-01T00:00:00Z',
+        updated_at: '2026-01-01T00:00:00Z',
+        authors: [{ id: 'a1', name: 'Kentaro Miura' }],
+        genres: [],
+        ...extra
+    };
+}
+
+function detailFixture(extra: Record<string, unknown> = {}) {
+    return {
+        ...cardFixture(),
+        tags: [],
+        ...extra
+    };
+}
+
 describe('mangas api client', () => {
     let fetchSpy: MockInstance<typeof globalThis.fetch>;
 
@@ -37,54 +72,65 @@ describe('mangas api client', () => {
         expect(url).toMatch(/\/v1\/mangas$/);
     });
 
-    it('listMangas returns the paged envelope', async () => {
+    it('listMangas returns the paged envelope with cards', async () => {
         fetchSpy.mockResolvedValueOnce(
             ok({
-                items: [
-                    {
-                        id: 'b1',
-                        title: 'Berserk',
-                        author: 'Miura',
-                        description: null,
-                        cover_image_path: null,
-                        created_at: '2026-01-01T00:00:00Z',
-                        updated_at: '2026-01-01T00:00:00Z'
-                    }
-                ],
-                page: { limit: 50, offset: 0, total: null }
+                items: [cardFixture()],
+                page: { limit: 50, offset: 0, total: 1 }
             })
         );
         const result = await listMangas();
         expect(result.items).toHaveLength(1);
         expect(result.items[0].title).toBe('Berserk');
-        expect(result.page).toEqual({ limit: 50, offset: 0, total: null });
+        expect(result.items[0].authors[0].name).toBe('Kentaro Miura');
+        expect(result.page).toEqual({ limit: 50, offset: 0, total: 1 });
     });
 
-    it('listMangas encodes search, limit, offset, sort', async () => {
+    it('listMangas encodes search, status, ids (csv), limit, offset, sort', async () => {
         fetchSpy.mockResolvedValueOnce(ok(emptyPage()));
-        await listMangas({ search: 'one piece', limit: 10, offset: 20, sort: 'title' });
+        await listMangas({
+            search: 'one piece',
+            status: 'completed',
+            authorIds: ['a1', 'a2'],
+            genreIds: ['g1'],
+            tagIds: ['t1', 't2'],
+            limit: 10,
+            offset: 20,
+            sort: 'title'
+        });
         const url = fetchSpy.mock.calls[0][0] as string;
         expect(url).toMatch(/\/v1\/mangas\?/);
         expect(url).toContain('search=one+piece');
+        expect(url).toContain('status=completed');
+        // Multi-value facets land as a single comma-separated param so the
+        // backend can apply pure AND semantics across the list.
+        expect(url).toContain('author_id=a1%2Ca2');
+        expect(url).toContain('genre_id=g1');
+        expect(url).toContain('tag_id=t1%2Ct2');
         expect(url).toContain('limit=10');
         expect(url).toContain('offset=20');
         expect(url).toContain('sort=title');
     });
 
-    it('createManga POSTs multipart with metadata to /v1/mangas', async () => {
+    it('getManga returns the enriched detail shape', async () => {
         fetchSpy.mockResolvedValueOnce(
-            ok({
-                id: 'abc',
-                title: 'Berserk',
-                author: 'Miura',
-                description: null,
-                cover_image_path: null,
-                created_at: '2026-01-01T00:00:00Z',
-                updated_at: '2026-01-01T00:00:00Z'
-            })
+            ok(detailFixture({ tags: [{ id: 't1', name: 'Seinen', added_by: 'u1' }] }))
         );
-        const m = await createManga({ title: 'Berserk', author: 'Miura' });
-        expect(m.title).toBe('Berserk');
+        const m = await getManga('b1');
+        expect(m.tags).toHaveLength(1);
+        expect(m.tags[0].name).toBe('Seinen');
+        expect(m.authors[0].name).toBe('Kentaro Miura');
+    });
+
+    it('createManga POSTs multipart with the new metadata shape', async () => {
+        fetchSpy.mockResolvedValueOnce(ok(detailFixture()));
+        await createManga({
+            title: 'Berserk',
+            authors: ['Kentaro Miura'],
+            status: 'completed',
+            alt_titles: ['ベルセルク'],
+            genre_ids: ['g1']
+        });
         const url = fetchSpy.mock.calls[0][0] as string;
         expect(url).toMatch(/\/v1\/mangas$/);
         const init = fetchSpy.mock.calls[0][1] as RequestInit;
@@ -94,13 +140,17 @@ describe('mangas api client', () => {
         const metadata = form.get('metadata') as Blob;
         expect(metadata).toBeInstanceOf(Blob);
         expect(metadata.type).toBe('application/json');
-        // jsdom doesn't implement Blob.text(); read the bytes via FileReader.
         const text = await new Promise<string>((resolve) => {
             const reader = new FileReader();
             reader.onload = () => resolve(reader.result as string);
             reader.readAsText(metadata);
         });
-        expect(text).toBe(JSON.stringify({ title: 'Berserk', author: 'Miura' }));
+        const parsed = JSON.parse(text);
+        expect(parsed.title).toBe('Berserk');
+        expect(parsed.authors).toEqual(['Kentaro Miura']);
+        expect(parsed.status).toBe('completed');
+        expect(parsed.alt_titles).toEqual(['ベルセルク']);
+        expect(parsed.genre_ids).toEqual(['g1']);
         expect(form.get('cover')).toBeNull();
         // The browser sets Content-Type with boundary automatically when body
         // is a FormData — we must NOT set it ourselves.
@@ -108,17 +158,7 @@ describe('mangas api client', () => {
     });
 
     it('createManga attaches the cover Blob when supplied', async () => {
-        fetchSpy.mockResolvedValueOnce(
-            ok({
-                id: 'abc',
-                title: 'Berserk',
-                author: null,
-                description: null,
-                cover_image_path: 'mangas/abc/cover.png',
-                created_at: '2026-01-01T00:00:00Z',
-                updated_at: '2026-01-01T00:00:00Z'
-            })
-        );
+        fetchSpy.mockResolvedValueOnce(ok(detailFixture()));
         const cover = new Blob([new Uint8Array([0x89, 0x50, 0x4e, 0x47])], { type: 'image/png' });
         await createManga({ title: 'Berserk' }, cover);
         const init = fetchSpy.mock.calls[0][1] as RequestInit;
@@ -127,6 +167,45 @@ describe('mangas api client', () => {
         expect(got).toBeInstanceOf(Blob);
     });
 
+    it('updateManga PATCHes with the provided patch body', async () => {
+        fetchSpy.mockResolvedValueOnce(ok(detailFixture({ status: 'completed' })));
+        const updated = await updateManga('b1', {
+            status: 'completed',
+            authors: ['Kentaro Miura', 'Studio Gaga']
+        });
+        expect(updated.status).toBe('completed');
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/mangas\/b1$/);
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('PATCH');
+        expect(JSON.parse(init.body as string)).toEqual({
+            status: 'completed',
+            authors: ['Kentaro Miura', 'Studio Gaga']
+        });
+    });
+
+    it('attachTag POSTs the name and returns the TagRef', async () => {
+        fetchSpy.mockResolvedValueOnce(
+            ok({ id: 't9', name: 'Dark Fantasy', added_by: 'u1' }, 201)
+        );
+        const tag = await attachTag('b1', 'Dark Fantasy');
+        expect(tag.name).toBe('Dark Fantasy');
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/mangas\/b1\/tags$/);
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('POST');
+        expect(JSON.parse(init.body as string)).toEqual({ name: 'Dark Fantasy' });
+    });
+
+    it('detachTag DELETEs the (manga, tag) pair', async () => {
+        fetchSpy.mockResolvedValueOnce(noContent());
+        await detachTag('b1', 't9');
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/mangas\/b1\/tags\/t9$/);
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('DELETE');
+    });
+
     it('getManga throws ApiError carrying the envelope code on non-2xx', async () => {
         fetchSpy.mockResolvedValue(envelope(404, 'not_found', 'manga not found'));
         await expect(getManga('missing')).rejects.toMatchObject({

frontend/src/lib/api/mangas.ts

@@ -1,22 +1,54 @@
-import { request, type Manga, type Page } from './client';
+import { request, type Manga, type MangaStatus, type Page } from './client';
 
 export type MangaSort = 'recent' | 'title';
 
+export type AuthorRef = { id: string; name: string };
+export type GenreRef = { id: string; name: string };
+export type TagRef = { id: string; name: string; added_by: string | null };
+
+/** Card shape returned by `GET /v1/mangas` — authors + genres, no tags. */
+export type MangaCard = Manga & {
+    authors: AuthorRef[];
+    genres: GenreRef[];
+};
+
+/** Detail shape returned by `GET /v1/mangas/:id`. Includes user tags. */
+export type MangaDetail = Manga & {
+    authors: AuthorRef[];
+    genres: GenreRef[];
+    tags: TagRef[];
+};
+
 export type ListOptions = {
     search?: string;
+    status?: MangaStatus;
+    /** AND across the list — every id must be attached to the manga. */
+    authorIds?: string[];
+    genreIds?: string[];
+    tagIds?: string[];
     limit?: number;
     offset?: number;
     sort?: MangaSort;
 };
 
 export type MangasPage = {
-    items: Manga[];
+    items: MangaCard[];
     page: Page;
 };
 
 export async function listMangas(opts: ListOptions = {}): Promise<MangasPage> {
     const params = new URLSearchParams();
     if (opts.search) params.set('search', opts.search);
+    if (opts.status) params.set('status', opts.status);
+    if (opts.authorIds && opts.authorIds.length) {
+        params.set('author_id', opts.authorIds.join(','));
+    }
+    if (opts.genreIds && opts.genreIds.length) {
+        params.set('genre_id', opts.genreIds.join(','));
+    }
+    if (opts.tagIds && opts.tagIds.length) {
+        params.set('tag_id', opts.tagIds.join(','));
+    }
     if (opts.limit != null) params.set('limit', String(opts.limit));
     if (opts.offset != null) params.set('offset', String(opts.offset));
     if (opts.sort) params.set('sort', opts.sort);
@@ -24,14 +56,18 @@ export async function listMangas(opts: ListOptions = {}): Promise<MangasPage> {
     return request<MangasPage>(`/v1/mangas${qs ? `?${qs}` : ''}`);
 }
 
-export async function getManga(id: string): Promise<Manga> {
-    return request<Manga>(`/v1/mangas/${encodeURIComponent(id)}`);
+export async function getManga(id: string): Promise<MangaDetail> {
+    return request<MangaDetail>(`/v1/mangas/${encodeURIComponent(id)}`);
 }
 
 export type NewManga = {
     title: string;
-    author?: string | null;
+    status?: MangaStatus;
+    /** Author display names; resolved server-side, case-insensitive. */
+    authors?: string[];
     description?: string | null;
+    alt_titles?: string[];
+    genre_ids?: string[];
 };
 
 /**
@@ -40,14 +76,55 @@ export type NewManga = {
  * automatically when `body` is a FormData, so we deliberately do not set
  * Content-Type ourselves.
  */
-export async function createManga(input: NewManga, cover?: Blob): Promise<Manga> {
+export async function createManga(
+    input: NewManga,
+    cover?: Blob
+): Promise<MangaDetail> {
     const form = new FormData();
     form.append(
         'metadata',
         new Blob([JSON.stringify(input)], { type: 'application/json' })
     );
     if (cover) form.append('cover', cover);
-    return request<Manga>('/v1/mangas', { method: 'POST', body: form });
+    return request<MangaDetail>('/v1/mangas', { method: 'POST', body: form });
 }
 
-export type { Manga, Page };
+export type MangaPatch = {
+    title?: string;
+    status?: MangaStatus;
+    description?: string | null;
+    alt_titles?: string[];
+    authors?: string[];
+    genre_ids?: string[];
+};
+
+export async function updateManga(
+    id: string,
+    patch: MangaPatch
+): Promise<MangaDetail> {
+    return request<MangaDetail>(`/v1/mangas/${encodeURIComponent(id)}`, {
+        method: 'PATCH',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify(patch)
+    });
+}
+
+export async function attachTag(
+    mangaId: string,
+    name: string
+): Promise<TagRef> {
+    return request<TagRef>(`/v1/mangas/${encodeURIComponent(mangaId)}/tags`, {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ name })
+    });
+}
+
+export async function detachTag(mangaId: string, tagId: string): Promise<void> {
+    await request<void>(
+        `/v1/mangas/${encodeURIComponent(mangaId)}/tags/${encodeURIComponent(tagId)}`,
+        { method: 'DELETE' }
+    );
+}
+
+export type { Manga, MangaStatus, Page };

frontend/src/lib/api/tags.test.ts

@@ -0,0 +1,38 @@
+import { describe, it, expect, vi, beforeEach, afterEach, type MockInstance } from 'vitest';
+import { listTags } from './tags';
+
+function ok(body: unknown): Response {
+    return new Response(JSON.stringify(body), {
+        status: 200,
+        headers: { 'content-type': 'application/json' }
+    });
+}
+
+describe('tags api client', () => {
+    let fetchSpy: MockInstance<typeof globalThis.fetch>;
+
+    beforeEach(() => {
+        fetchSpy = vi.spyOn(globalThis, 'fetch');
+    });
+    afterEach(() => {
+        vi.restoreAllMocks();
+    });
+
+    it('listTags GETs /v1/tags with no query when no opts', async () => {
+        fetchSpy.mockResolvedValueOnce(ok([]));
+        await listTags();
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/tags$/);
+    });
+
+    it('listTags encodes search + limit', async () => {
+        fetchSpy.mockResolvedValueOnce(
+            ok([{ id: 't1', name: 'Mystery', created_at: '2026-01-01T00:00:00Z' }])
+        );
+        const tags = await listTags({ search: 'myst', limit: 5 });
+        expect(tags[0].name).toBe('Mystery');
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toContain('search=myst');
+        expect(url).toContain('limit=5');
+    });
+});

frontend/src/lib/api/tags.ts

@@ -0,0 +1,21 @@
+import { request } from './client';
+
+export type Tag = {
+    id: string;
+    name: string;
+    created_at: string;
+};
+
+export type ListTagsOptions = {
+    search?: string;
+    limit?: number;
+};
+
+/** Autocomplete for the tag input. Server sorts by trigram similarity. */
+export async function listTags(opts: ListTagsOptions = {}): Promise<Tag[]> {
+    const params = new URLSearchParams();
+    if (opts.search) params.set('search', opts.search);
+    if (opts.limit != null) params.set('limit', String(opts.limit));
+    const qs = params.toString();
+    return request<Tag[]>(`/v1/tags${qs ? `?${qs}` : ''}`);
+}

frontend/src/lib/components/Chip.svelte

@@ -0,0 +1,118 @@
+<script lang="ts">
+    import X from '@lucide/svelte/icons/x';
+
+    type Variant = 'neutral' | 'primary' | 'soft';
+
+    let {
+        label,
+        href,
+        variant = 'neutral',
+        onRemove,
+        removeLabel = 'Remove',
+        testid
+    }: {
+        label: string;
+        href?: string;
+        variant?: Variant;
+        onRemove?: () => void;
+        removeLabel?: string;
+        testid?: string;
+    } = $props();
+</script>
+
+{#if href}
+    <a class="chip {variant}" {href} data-testid={testid}>
+        <span class="chip-label">{label}</span>
+        {#if onRemove}
+            <button
+                type="button"
+                class="chip-remove"
+                aria-label={removeLabel}
+                title={removeLabel}
+                onclick={(e) => {
+                    e.preventDefault();
+                    onRemove?.();
+                }}
+            >
+                <X size={12} aria-hidden="true" />
+            </button>
+        {/if}
+    </a>
+{:else}
+    <span class="chip {variant}" data-testid={testid}>
+        <span class="chip-label">{label}</span>
+        {#if onRemove}
+            <button
+                type="button"
+                class="chip-remove"
+                aria-label={removeLabel}
+                title={removeLabel}
+                onclick={() => onRemove?.()}
+            >
+                <X size={12} aria-hidden="true" />
+            </button>
+        {/if}
+    </span>
+{/if}
+
+<style>
+    .chip {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-1);
+        padding: 2px var(--space-2);
+        border-radius: var(--radius-pill);
+        font-size: var(--font-xs);
+        font-weight: var(--weight-medium);
+        line-height: var(--leading-tight);
+        background: var(--surface-elevated);
+        border: 1px solid var(--border);
+        color: var(--text);
+        text-decoration: none;
+        white-space: nowrap;
+    }
+
+    a.chip:hover {
+        background: var(--primary-soft-bg);
+        border-color: var(--primary);
+        color: var(--text);
+        text-decoration: none;
+    }
+
+    .chip.primary {
+        background: var(--primary-soft-bg);
+        border-color: var(--primary);
+    }
+
+    .chip.soft {
+        background: transparent;
+        border-color: var(--border-strong);
+        color: var(--text-muted);
+    }
+
+    .chip-label {
+        overflow: hidden;
+        text-overflow: ellipsis;
+    }
+
+    .chip-remove {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: 16px;
+        height: 16px;
+        padding: 0;
+        background: transparent;
+        border: 0;
+        color: inherit;
+        opacity: 0.6;
+        cursor: pointer;
+        border-radius: var(--radius-pill);
+    }
+
+    .chip-remove:hover {
+        opacity: 1;
+        background: var(--danger-soft-bg);
+        color: var(--danger);
+    }
+</style>

frontend/src/routes/+page.svelte

@@ -1,23 +1,56 @@
 <script lang="ts">
     import { onMount } from 'svelte';
-    import { listMangas, type Manga, type MangaSort } from '$lib/api/mangas';
+    import { browser } from '$app/environment';
+    import { goto } from '$app/navigation';
+    import { page } from '$app/stores';
+    import {
+        listMangas,
+        type MangaCard,
+        type MangaSort,
+        type MangaStatus
+    } from '$lib/api/mangas';
+    import { listGenres, type Genre } from '$lib/api/genres';
+    import { listTags, type Tag } from '$lib/api/tags';
     import { fileUrl } from '$lib/api/client';
+    import Chip from '$lib/components/Chip.svelte';
     import Search from '@lucide/svelte/icons/search';
     import BookImage from '@lucide/svelte/icons/book-image';
+    import SlidersHorizontal from '@lucide/svelte/icons/sliders-horizontal';
+    import Plus from '@lucide/svelte/icons/plus';
 
-    let mangas: Manga[] = $state([]);
+    let mangas: MangaCard[] = $state([]);
     let search = $state('');
     let sort: MangaSort = $state('recent');
+    let statusFilter = $state<'' | MangaStatus>('');
+    let selectedGenres = $state<Genre[]>([]);
+    let selectedTags = $state<Tag[]>([]);
+    let allGenres = $state<Genre[]>([]);
+    let tagDraft = $state('');
+    let tagSuggestions = $state<Tag[]>([]);
+    let tagSuggestHighlight = $state(-1);
+    let suggestTimer: ReturnType<typeof setTimeout> | null = null;
+    // Monotonic counter — discards stale fetch results so a fast typist
+    // can't see an earlier query's results overwrite the current one.
+    let suggestSeq = 0;
+    const tagSuggestListId = 'tag-filter-suggest-list';
+    let filtersOpen = $state(false);
     let total: number | null = $state(null);
     let loading = $state(true);
     let error: string | null = $state(null);
 
+    const activeFilterCount = $derived(
+        (statusFilter ? 1 : 0) + selectedGenres.length + selectedTags.length
+    );
+
     async function load() {
         loading = true;
         error = null;
         try {
             const result = await listMangas({
                 search: search.trim() || undefined,
+                status: statusFilter || undefined,
+                genreIds: selectedGenres.map((g) => g.id),
+                tagIds: selectedTags.map((t) => t.id),
                 sort
             });
             mangas = result.items;
@@ -29,20 +62,156 @@
         }
     }
 
+    function syncUrl() {
+        if (!browser) return;
+        const params = new URLSearchParams();
+        if (search.trim()) params.set('q', search.trim());
+        if (sort !== 'recent') params.set('sort', sort);
+        if (statusFilter) params.set('status', statusFilter);
+        if (selectedGenres.length)
+            params.set('genres', selectedGenres.map((g) => g.id).join(','));
+        if (selectedTags.length)
+            params.set('tags', selectedTags.map((t) => t.id).join(','));
+        const qs = params.toString();
+        const url = qs ? `/?${qs}` : '/';
+        goto(url, { replaceState: true, keepFocus: true, noScroll: true });
+    }
+
+    async function hydrateFromUrl() {
+        // Parse the query and resolve the supplied ids back to full Tag /
+        // Genre objects so the chip rows render real labels.
+        const url = new URL($page.url);
+        search = url.searchParams.get('q') ?? '';
+        const s = url.searchParams.get('sort');
+        if (s === 'title' || s === 'recent') sort = s;
+        const st = url.searchParams.get('status');
+        statusFilter = st === 'ongoing' || st === 'completed' ? st : '';
+        const genreIds = (url.searchParams.get('genres') ?? '')
+            .split(',')
+            .filter(Boolean);
+        if (genreIds.length) {
+            selectedGenres = allGenres.filter((g) => genreIds.includes(g.id));
+        }
+        const tagIds = (url.searchParams.get('tags') ?? '')
+            .split(',')
+            .filter(Boolean);
+        if (tagIds.length) {
+            // listTags doesn't take ids; fetch a generous page and filter.
+            // Tag count is small in the near term, so this is fine.
+            const tags = await listTags({ limit: 50 });
+            selectedTags = tags.filter((t) => tagIds.includes(t.id));
+        }
+        // Open the filters panel if anything is active so the user can see why.
+        if (statusFilter || selectedGenres.length || selectedTags.length) {
+            filtersOpen = true;
+        }
+    }
+
+    async function onSubmit(e: SubmitEvent) {
+        e.preventDefault();
+        syncUrl();
+        await load();
+    }
+
     function onSortChange() {
+        syncUrl();
         load();
     }
 
-    onMount(load);
+    function onStatusChange() {
+        syncUrl();
+        load();
+    }
+
+    function toggleGenre(g: Genre) {
+        selectedGenres = selectedGenres.some((x) => x.id === g.id)
+            ? selectedGenres.filter((x) => x.id !== g.id)
+            : [...selectedGenres, g];
+        syncUrl();
+        load();
+    }
+
+    function removeTag(t: Tag) {
+        selectedTags = selectedTags.filter((x) => x.id !== t.id);
+        syncUrl();
+        load();
+    }
+
+    function pickTag(t: Tag) {
+        if (!selectedTags.some((x) => x.id === t.id)) {
+            selectedTags = [...selectedTags, t];
+        }
+        tagDraft = '';
+        tagSuggestions = [];
+        tagSuggestHighlight = -1;
+        syncUrl();
+        load();
+    }
+
+    function onTagDraftInput() {
+        tagSuggestHighlight = -1;
+        if (suggestTimer) clearTimeout(suggestTimer);
+        const q = tagDraft.trim();
+        if (q.length === 0) {
+            tagSuggestions = [];
+            suggestSeq++;
+            return;
+        }
+        const seq = ++suggestSeq;
+        suggestTimer = setTimeout(async () => {
+            try {
+                const matched = await listTags({ search: q, limit: 6 });
+                if (seq !== suggestSeq) return;
+                const chosen = new Set(selectedTags.map((t) => t.id));
+                tagSuggestions = matched.filter((m) => !chosen.has(m.id));
+            } catch {
+                if (seq === suggestSeq) tagSuggestions = [];
+            }
+        }, 180);
+    }
+
+    function onTagFilterKeydown(e: KeyboardEvent) {
+        if (e.key === 'ArrowDown' && tagSuggestions.length > 0) {
+            e.preventDefault();
+            tagSuggestHighlight = (tagSuggestHighlight + 1) % tagSuggestions.length;
+        } else if (e.key === 'ArrowUp' && tagSuggestions.length > 0) {
+            e.preventDefault();
+            tagSuggestHighlight =
+                tagSuggestHighlight <= 0
+                    ? tagSuggestions.length - 1
+                    : tagSuggestHighlight - 1;
+        } else if (e.key === 'Enter' && tagSuggestHighlight >= 0) {
+            e.preventDefault();
+            pickTag(tagSuggestions[tagSuggestHighlight]);
+        } else if (e.key === 'Escape') {
+            tagSuggestions = [];
+            tagSuggestHighlight = -1;
+        }
+    }
+
+    function clearFilters() {
+        statusFilter = '';
+        selectedGenres = [];
+        selectedTags = [];
+        syncUrl();
+        load();
+    }
+
+    onMount(async () => {
+        try {
+            allGenres = await listGenres();
+        } catch {
+            // Filter UI still loads with an empty genre list rather than blocking.
+        }
+        await hydrateFromUrl();
+        await load();
+    });
 </script>
 
 <h1>Mangas</h1>
 
 <form
-    onsubmit={(e) => {
-        e.preventDefault();
-        load();
-    }}
+    onsubmit={onSubmit}
     action="javascript:void(0)"
     class="controls"
 >
@@ -54,10 +223,147 @@
             placeholder="Search by title or author"
             data-testid="search-input"
         />
-        <button class="icon-btn" type="submit" aria-label="Search" title="Search">
+        <button class="icon-btn primary" type="submit" aria-label="Search" title="Search">
             <Search size={18} aria-hidden="true" />
         </button>
+        <button
+            type="button"
+            class="filters-toggle"
+            class:active={filtersOpen}
+            onclick={() => (filtersOpen = !filtersOpen)}
+            aria-expanded={filtersOpen}
+            aria-controls="filters-panel"
+            data-testid="filters-toggle"
+        >
+            <SlidersHorizontal size={16} aria-hidden="true" />
+            <span>Filters</span>
+            {#if activeFilterCount > 0}
+                <span class="filter-count">{activeFilterCount}</span>
+            {/if}
+        </button>
     </div>
+    {#if filtersOpen}
+        <div class="filters-panel" id="filters-panel" data-testid="filters-panel">
+            <div class="filter-group">
+                <span class="filter-label">Status</span>
+                <div class="status-row">
+                    <label>
+                        <input
+                            type="radio"
+                            name="status"
+                            value=""
+                            bind:group={statusFilter}
+                            onchange={onStatusChange}
+                        />
+                        <span>Any</span>
+                    </label>
+                    <label>
+                        <input
+                            type="radio"
+                            name="status"
+                            value="ongoing"
+                            bind:group={statusFilter}
+                            onchange={onStatusChange}
+                        />
+                        <span>Ongoing</span>
+                    </label>
+                    <label>
+                        <input
+                            type="radio"
+                            name="status"
+                            value="completed"
+                            bind:group={statusFilter}
+                            onchange={onStatusChange}
+                        />
+                        <span>Completed</span>
+                    </label>
+                </div>
+            </div>
+
+            <div class="filter-group">
+                <span class="filter-label">Genres (all must match)</span>
+                <div class="filter-chip-row">
+                    {#each allGenres as g (g.id)}
+                        {@const on = selectedGenres.some((x) => x.id === g.id)}
+                        <button
+                            type="button"
+                            class="genre-pill"
+                            class:active={on}
+                            onclick={() => toggleGenre(g)}
+                            data-testid={`genre-filter-${g.name}`}
+                        >
+                            {g.name}
+                        </button>
+                    {/each}
+                </div>
+            </div>
+
+            <div class="filter-group">
+                <span class="filter-label">Tags (all must match)</span>
+                {#if selectedTags.length > 0}
+                    <div class="filter-chip-row">
+                        {#each selectedTags as t (t.id)}
+                            <Chip
+                                label={t.name}
+                                variant="primary"
+                                onRemove={() => removeTag(t)}
+                                removeLabel={`Remove tag ${t.name}`}
+                                testid={`tag-filter-chip-${t.name}`}
+                            />
+                        {/each}
+                    </div>
+                {/if}
+                <div class="tag-search">
+                    <input
+                        type="text"
+                        role="combobox"
+                        bind:value={tagDraft}
+                        oninput={onTagDraftInput}
+                        onkeydown={onTagFilterKeydown}
+                        placeholder="Type to find a tag"
+                        maxlength="64"
+                        aria-label="Find a tag"
+                        aria-controls={tagSuggestListId}
+                        aria-expanded={tagSuggestions.length > 0}
+                        aria-autocomplete="list"
+                        aria-activedescendant={tagSuggestHighlight >= 0
+                            ? `${tagSuggestListId}-opt-${tagSuggestHighlight}`
+                            : undefined}
+                        data-testid="tag-filter-input"
+                    />
+                    {#if tagSuggestions.length > 0}
+                        <ul class="tag-suggestions" role="listbox" id={tagSuggestListId}>
+                            {#each tagSuggestions as s, i (s.id)}
+                                <li
+                                    id={`${tagSuggestListId}-opt-${i}`}
+                                    role="option"
+                                    aria-selected={i === tagSuggestHighlight}
+                                    class:active={i === tagSuggestHighlight}
+                                >
+                                    <button
+                                        type="button"
+                                        tabindex="-1"
+                                        onmouseenter={() => (tagSuggestHighlight = i)}
+                                        onclick={() => pickTag(s)}
+                                        data-testid={`tag-filter-suggestion-${s.name}`}
+                                    >
+                                        <Plus size={12} aria-hidden="true" />
+                                        {s.name}
+                                    </button>
+                                </li>
+                            {/each}
+                        </ul>
+                    {/if}
+                </div>
+            </div>
+
+            {#if activeFilterCount > 0}
+                <button type="button" class="clear" onclick={clearFilters}>
+                    Clear filters
+                </button>
+            {/if}
+        </div>
+    {/if}
     <div class="config-row">
         <label class="sort">
             <span>Sort</span>
@@ -100,7 +406,16 @@
                 </a>
                 <div class="meta">
                     <a href="/manga/{m.id}" class="title">{m.title}</a>
-                    {#if m.author}<span class="author">{m.author}</span>{/if}
+                    {#if m.authors.length > 0}
+                        <span class="author">
+                            {m.authors.map((a) => a.name).join(', ')}
+                        </span>
+                    {/if}
+                    {#if m.genres.length > 0}
+                        <span class="genres">
+                            {m.genres.map((g) => g.name).join(' · ')}
+                        </span>
+                    {/if}
                 </div>
             </li>
         {/each}
@@ -119,6 +434,7 @@
         display: flex;
         gap: var(--space-2);
         align-items: center;
+        flex-wrap: wrap;
     }
 
     .search {
@@ -127,6 +443,150 @@
         max-width: 28rem;
     }
 
+    .filters-toggle {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-2);
+        padding: 0 var(--space-3);
+        height: 36px;
+        background: var(--surface);
+        border: 1px solid var(--border-strong);
+        color: var(--text);
+        cursor: pointer;
+    }
+
+    .filters-toggle:hover,
+    .filters-toggle.active {
+        background: var(--surface-elevated);
+        border-color: var(--primary);
+    }
+
+    .filter-count {
+        background: var(--primary);
+        color: var(--primary-contrast);
+        border-radius: var(--radius-pill);
+        font-size: var(--font-xs);
+        padding: 0 6px;
+        min-width: 18px;
+        text-align: center;
+    }
+
+    .filters-panel {
+        display: flex;
+        flex-direction: column;
+        gap: var(--space-3);
+        padding: var(--space-3);
+        background: var(--surface);
+        border: 1px solid var(--border);
+        border-radius: var(--radius-md);
+    }
+
+    .filter-group {
+        display: flex;
+        flex-direction: column;
+        gap: var(--space-2);
+    }
+
+    .filter-label {
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+        font-weight: var(--weight-medium);
+    }
+
+    .status-row {
+        display: flex;
+        gap: var(--space-3);
+        flex-wrap: wrap;
+    }
+
+    .status-row label {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-1);
+        color: var(--text);
+        font-size: var(--font-sm);
+        cursor: pointer;
+    }
+
+    .filter-chip-row {
+        display: flex;
+        flex-wrap: wrap;
+        gap: var(--space-2);
+    }
+
+    .genre-pill {
+        display: inline-flex;
+        align-items: center;
+        padding: 4px var(--space-2);
+        background: var(--surface-elevated);
+        border: 1px solid var(--border);
+        color: var(--text);
+        border-radius: var(--radius-pill);
+        font-size: var(--font-xs);
+        cursor: pointer;
+    }
+
+    .genre-pill:hover {
+        border-color: var(--primary);
+    }
+
+    .genre-pill.active {
+        background: var(--primary-soft-bg);
+        border-color: var(--primary);
+        color: var(--primary);
+    }
+
+    .tag-search {
+        position: relative;
+        max-width: 20rem;
+    }
+
+    .tag-search input {
+        width: 100%;
+    }
+
+    .tag-suggestions {
+        position: absolute;
+        top: 100%;
+        left: 0;
+        right: 0;
+        margin: var(--space-1) 0 0;
+        padding: var(--space-1) 0;
+        list-style: none;
+        background: var(--surface);
+        border: 1px solid var(--border);
+        border-radius: var(--radius-md);
+        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+        z-index: var(--z-dropdown);
+    }
+
+    .tag-suggestions button {
+        width: 100%;
+        background: transparent;
+        border: 0;
+        text-align: left;
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-2);
+        padding: var(--space-1) var(--space-3);
+        color: var(--text);
+        cursor: pointer;
+        font-size: var(--font-sm);
+    }
+
+    .tag-suggestions li.active button,
+    .tag-suggestions button:hover {
+        background: var(--primary-soft-bg);
+    }
+
+    .clear {
+        align-self: flex-start;
+        background: transparent;
+        border: 1px solid var(--border);
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+    }
+
     .config-row {
         display: flex;
         flex-wrap: wrap;
@@ -153,12 +613,15 @@
         width: 36px;
         height: 36px;
         padding: 0;
+    }
+
+    .icon-btn.primary {
         background: var(--primary);
         color: var(--primary-contrast);
         border: 1px solid var(--primary);
     }
 
-    .icon-btn:hover:not(:disabled) {
+    .icon-btn.primary:hover:not(:disabled) {
         background: var(--primary-hover);
         border-color: var(--primary-hover);
     }
@@ -237,7 +700,8 @@
         text-decoration: none;
     }
 
-    .author {
+    .author,
+    .genres {
         color: var(--text-muted);
         font-size: var(--font-xs);
         white-space: nowrap;

frontend/src/routes/manga/[id]/+page.svelte

@@ -1,16 +1,27 @@
 <script lang="ts">
     import { fileUrl } from '$lib/api/client';
     import { createBookmark, deleteBookmark, type Bookmark } from '$lib/api/bookmarks';
+    import {
+        attachTag,
+        detachTag,
+        type AuthorRef,
+        type GenreRef,
+        type TagRef
+    } from '$lib/api/mangas';
+    import { listTags, type Tag } from '$lib/api/tags';
     import { session } from '$lib/session.svelte';
+    import Chip from '$lib/components/Chip.svelte';
+    import Plus from '@lucide/svelte/icons/plus';
 
     let { data } = $props();
     const manga = $derived(data.manga);
     const chapters = $derived(data.chapters);
 
-    // Local working copy of the bookmark list — mutated optimistically
-    // when the user toggles, instead of re-fetching from the server.
-    // The route re-mounts on /manga/{id} → /manga/{other} navigation,
-    // so capturing the initial value here is the desired behaviour.
+    const authors = $derived<AuthorRef[]>(manga.authors);
+    const genres = $derived<GenreRef[]>(manga.genres);
+
+    // svelte-ignore state_referenced_locally
+    let tags = $state<TagRef[]>([...manga.tags]);
     // svelte-ignore state_referenced_locally
     let bookmarks = $state<Bookmark[]>([...data.bookmarks]);
 
@@ -19,6 +30,7 @@
     );
 
     let busy = $state(false);
+    let altTitlesOpen = $state(false);
 
     async function toggleBookmark() {
         if (!session.user) return;
@@ -36,6 +48,106 @@
             busy = false;
         }
     }
+
+    // ---- Tag UI ----
+    let tagDraft = $state('');
+    let tagAddBusy = $state(false);
+    let tagError = $state<string | null>(null);
+    let suggestions = $state<Tag[]>([]);
+    let suggestHighlight = $state(-1);
+    let suggestTimer: ReturnType<typeof setTimeout> | null = null;
+    // Monotonic counter — late-returning fetches with a stale seq are
+    // discarded so a fast typist can't see results from a previous
+    // query overwrite the current one.
+    let suggestSeq = 0;
+    const suggestListId = 'tag-suggest-list';
+
+    function onTagDraftInput() {
+        tagError = null;
+        suggestHighlight = -1;
+        if (suggestTimer) clearTimeout(suggestTimer);
+        const q = tagDraft.trim();
+        if (q.length === 0) {
+            suggestions = [];
+            suggestSeq++;
+            return;
+        }
+        const seq = ++suggestSeq;
+        suggestTimer = setTimeout(async () => {
+            try {
+                const matched = await listTags({ search: q, limit: 6 });
+                if (seq !== suggestSeq) return;
+                // Hide tags already attached so the menu only suggests new picks.
+                const attached = new Set(tags.map((t) => t.id));
+                suggestions = matched.filter((m) => !attached.has(m.id));
+            } catch {
+                if (seq === suggestSeq) suggestions = [];
+            }
+        }, 180);
+    }
+
+    function onTagKeydown(e: KeyboardEvent) {
+        if (e.key === 'ArrowDown' && suggestions.length > 0) {
+            e.preventDefault();
+            suggestHighlight = (suggestHighlight + 1) % suggestions.length;
+        } else if (e.key === 'ArrowUp' && suggestions.length > 0) {
+            e.preventDefault();
+            suggestHighlight =
+                suggestHighlight <= 0 ? suggestions.length - 1 : suggestHighlight - 1;
+        } else if (e.key === 'Escape') {
+            suggestions = [];
+            suggestHighlight = -1;
+        }
+        // Enter is handled by the form's onsubmit — if a suggestion is
+        // highlighted we submit that name, otherwise we submit the
+        // raw draft so a brand-new tag can still be created inline.
+    }
+
+    async function submitTag(name: string) {
+        const trimmed = name.trim();
+        if (!trimmed || !session.user || tagAddBusy) return;
+        tagAddBusy = true;
+        tagError = null;
+        try {
+            const attached = await attachTag(manga.id, trimmed);
+            // If the tag was already attached by someone else, the
+            // server returns 200 + the existing ref — replace any
+            // matching entry to keep local state coherent.
+            tags = [...tags.filter((t) => t.id !== attached.id), attached];
+            tagDraft = '';
+            suggestions = [];
+            suggestHighlight = -1;
+        } catch (e) {
+            tagError = (e as Error).message;
+        } finally {
+            tagAddBusy = false;
+        }
+    }
+
+    async function removeTag(tag: TagRef) {
+        if (!session.user || tag.added_by !== session.user.id) return;
+        const snapshot = tags;
+        tags = tags.filter((t) => t.id !== tag.id);
+        try {
+            await detachTag(manga.id, tag.id);
+        } catch (e) {
+            tags = snapshot;
+            tagError = (e as Error).message;
+        }
+    }
+
+    function onTagFormSubmit(e: SubmitEvent) {
+        e.preventDefault();
+        // If the user arrowed down to a suggestion, pick it; otherwise
+        // submit whatever's in the input (allows creating a new tag).
+        const target =
+            suggestHighlight >= 0 && suggestions[suggestHighlight]
+                ? suggestions[suggestHighlight].name
+                : tagDraft;
+        submitTag(target);
+    }
+
+    const statusLabel = $derived(manga.status === 'completed' ? 'Completed' : 'Ongoing');
 </script>
 
 <svelte:head>
@@ -54,10 +166,119 @@
             />
         {/if}
         <div class="meta">
-            <h1 data-testid="manga-title">{manga.title}</h1>
-            {#if manga.author}
-                <p class="author" data-testid="manga-author">by {manga.author}</p>
+            <div class="title-row">
+                <h1 data-testid="manga-title">{manga.title}</h1>
+                <span
+                    class="status-badge status-{manga.status}"
+                    data-testid="manga-status"
+                >
+                    {statusLabel}
+                </span>
+            </div>
+
+            {#if authors.length > 0}
+                <div class="chip-row" data-testid="manga-authors">
+                    <span class="chip-row-label">by</span>
+                    {#each authors as a (a.id)}
+                        <Chip label={a.name} href={`/authors/${a.id}`} variant="primary" />
+                    {/each}
+                </div>
             {/if}
+
+            {#if manga.alt_titles.length > 0}
+                <details
+                    class="alt-titles"
+                    bind:open={altTitlesOpen}
+                    data-testid="manga-alt-titles"
+                >
+                    <summary>Also known as ({manga.alt_titles.length})</summary>
+                    <ul>
+                        {#each manga.alt_titles as alt}
+                            <li>{alt}</li>
+                        {/each}
+                    </ul>
+                </details>
+            {/if}
+
+            {#if genres.length > 0}
+                <div class="chip-row" data-testid="manga-genres">
+                    <span class="chip-row-label">Genres</span>
+                    {#each genres as g (g.id)}
+                        <Chip label={g.name} />
+                    {/each}
+                </div>
+            {/if}
+
+            <div class="chip-row tag-row" data-testid="manga-tags">
+                <span class="chip-row-label">Tags</span>
+                {#each tags as t (t.id)}
+                    <Chip
+                        label={t.name}
+                        variant="soft"
+                        onRemove={session.user && t.added_by === session.user.id
+                            ? () => removeTag(t)
+                            : undefined}
+                        removeLabel="Remove tag"
+                    />
+                {/each}
+                {#if session.user}
+                    <form class="tag-form" onsubmit={onTagFormSubmit}>
+                        <input
+                            type="text"
+                            role="combobox"
+                            bind:value={tagDraft}
+                            oninput={onTagDraftInput}
+                            onkeydown={onTagKeydown}
+                            placeholder="Add tag"
+                            maxlength="64"
+                            aria-label="Add tag"
+                            aria-controls={suggestListId}
+                            aria-expanded={suggestions.length > 0}
+                            aria-autocomplete="list"
+                            aria-activedescendant={suggestHighlight >= 0
+                                ? `${suggestListId}-opt-${suggestHighlight}`
+                                : undefined}
+                            class="tag-input"
+                            data-testid="tag-input"
+                        />
+                        <button
+                            type="submit"
+                            class="tag-add-btn"
+                            disabled={!tagDraft.trim() || tagAddBusy}
+                            aria-label="Add tag"
+                            title="Add tag"
+                        >
+                            <Plus size={14} aria-hidden="true" />
+                        </button>
+                        {#if suggestions.length > 0}
+                            <ul class="tag-suggestions" role="listbox" id={suggestListId}>
+                                {#each suggestions as s, i (s.id)}
+                                    <li
+                                        id={`${suggestListId}-opt-${i}`}
+                                        role="option"
+                                        aria-selected={i === suggestHighlight}
+                                        class:active={i === suggestHighlight}
+                                    >
+                                        <button
+                                            type="button"
+                                            tabindex="-1"
+                                            onmouseenter={() => (suggestHighlight = i)}
+                                            onclick={() => submitTag(s.name)}
+                                            data-testid="tag-suggestion"
+                                        >
+                                            {s.name}
+                                        </button>
+                                    </li>
+                                {/each}
+                            </ul>
+                        {/if}
+                    </form>
+                {/if}
+            </div>
+            {#if tagError}
+                <p class="tag-error" role="alert">{tagError}</p>
+            {/if}
+
             {#if manga.description}
                 <p class="description" data-testid="manga-description">{manga.description}</p>
             {/if}
@@ -123,15 +344,135 @@
         background: var(--surface);
     }
 
-    .author {
+    .title-row {
+        display: flex;
+        align-items: center;
+        gap: var(--space-3);
+        flex-wrap: wrap;
+    }
+
+    .title-row h1 {
+        margin: 0;
+    }
+
+    .status-badge {
+        display: inline-flex;
+        align-items: center;
+        padding: 2px var(--space-2);
+        border-radius: var(--radius-pill);
+        font-size: var(--font-xs);
+        font-weight: var(--weight-semibold);
+        background: var(--surface-elevated);
+        border: 1px solid var(--border-strong);
         color: var(--text-muted);
-        margin: 0 0 var(--space-3);
+        text-transform: uppercase;
+        letter-spacing: 0.04em;
+    }
+
+    .status-badge.status-completed {
+        background: var(--success-soft-bg, var(--surface-elevated));
+        color: var(--success);
+        border-color: var(--success);
+    }
+
+    .chip-row {
+        display: flex;
+        flex-wrap: wrap;
+        align-items: center;
+        gap: var(--space-2);
+        margin: var(--space-2) 0;
+    }
+
+    .chip-row-label {
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+    }
+
+    .alt-titles {
+        margin: var(--space-2) 0;
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+    }
+
+    .alt-titles ul {
+        margin: var(--space-1) 0 0;
+        padding-left: var(--space-5);
     }
 
     .description {
         white-space: pre-wrap;
         color: var(--text);
-        margin-bottom: var(--space-3);
+        margin: var(--space-3) 0;
+    }
+
+    .tag-row {
+        position: relative;
+    }
+
+    .tag-form {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-1);
+        position: relative;
+    }
+
+    .tag-input {
+        height: 28px;
+        padding: 0 var(--space-2);
+        font-size: var(--font-xs);
+        width: 8rem;
+    }
+
+    .tag-add-btn {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: 28px;
+        height: 28px;
+        padding: 0;
+        background: var(--primary);
+        color: var(--primary-contrast);
+        border: 1px solid var(--primary);
+    }
+
+    .tag-add-btn:hover:not(:disabled) {
+        background: var(--primary-hover);
+    }
+
+    .tag-suggestions {
+        position: absolute;
+        top: 100%;
+        left: 0;
+        margin: var(--space-1) 0 0;
+        padding: var(--space-1) 0;
+        list-style: none;
+        background: var(--surface);
+        border: 1px solid var(--border);
+        border-radius: var(--radius-md);
+        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+        z-index: var(--z-dropdown);
+        min-width: 10rem;
+    }
+
+    .tag-suggestions button {
+        width: 100%;
+        background: transparent;
+        border: 0;
+        text-align: left;
+        padding: var(--space-1) var(--space-3);
+        color: var(--text);
+        cursor: pointer;
+        font-size: var(--font-sm);
+    }
+
+    .tag-suggestions li.active button,
+    .tag-suggestions button:hover {
+        background: var(--primary-soft-bg);
+    }
+
+    .tag-error {
+        color: var(--danger);
+        font-size: var(--font-sm);
     }
 
     .bookmark {

frontend/src/routes/upload/+page.svelte

@@ -1,24 +1,32 @@
 <script lang="ts">
     import { goto } from '$app/navigation';
     import { ApiError, fileUrl } from '$lib/api/client';
-    import { createManga } from '$lib/api/mangas';
+    import { createManga, type MangaStatus } from '$lib/api/mangas';
     import { request } from '$lib/api/client';
     import { session } from '$lib/session.svelte';
     import { formatBytes, validateImageFile } from '$lib/upload-validation';
+    import Chip from '$lib/components/Chip.svelte';
     import ArrowUp from '@lucide/svelte/icons/arrow-up';
     import ArrowDown from '@lucide/svelte/icons/arrow-down';
     import Trash2 from '@lucide/svelte/icons/trash-2';
     import UploadCloud from '@lucide/svelte/icons/upload-cloud';
     import BookImage from '@lucide/svelte/icons/book-image';
+    import Plus from '@lucide/svelte/icons/plus';
 
     let { data } = $props();
     const mangas = $derived(data.mangas);
+    const genres = $derived(data.genres);
 
     // -------- Manga form state --------
 
     let mangaTitle = $state('');
-    let mangaAuthor = $state('');
+    let mangaStatus = $state<MangaStatus>('ongoing');
     let mangaDescription = $state('');
+    let mangaAuthors = $state<string[]>([]);
+    let authorDraft = $state('');
+    let mangaAltTitles = $state<string[]>([]);
+    let altTitleDraft = $state('');
+    let mangaGenreIds = $state<string[]>([]);
     let coverFile = $state<File | null>(null);
     let coverError = $state<string | null>(null);
     let mangaSubmitting = $state(false);
@@ -30,6 +38,38 @@
         mangaTitle.trim().length > 0 && !coverError && !mangaSubmitting
     );
 
+    function addAuthor() {
+        const name = authorDraft.trim();
+        if (!name) return;
+        if (!mangaAuthors.some((a) => a.toLowerCase() === name.toLowerCase())) {
+            mangaAuthors = [...mangaAuthors, name];
+        }
+        authorDraft = '';
+    }
+
+    function removeAuthor(name: string) {
+        mangaAuthors = mangaAuthors.filter((a) => a !== name);
+    }
+
+    function addAltTitle() {
+        const t = altTitleDraft.trim();
+        if (!t) return;
+        if (!mangaAltTitles.includes(t)) {
+            mangaAltTitles = [...mangaAltTitles, t];
+        }
+        altTitleDraft = '';
+    }
+
+    function removeAltTitle(t: string) {
+        mangaAltTitles = mangaAltTitles.filter((x) => x !== t);
+    }
+
+    function toggleGenre(id: string) {
+        mangaGenreIds = mangaGenreIds.includes(id)
+            ? mangaGenreIds.filter((g) => g !== id)
+            : [...mangaGenreIds, id];
+    }
+
     function onCoverChange(e: Event) {
         const input = e.target as HTMLInputElement;
         const file = input.files?.[0] ?? null;
@@ -40,6 +80,10 @@
     async function submitManga(e: SubmitEvent) {
         e.preventDefault();
         if (!canSubmitManga) return;
+        // Pick up an unsubmitted token if the user hit Submit without
+        // pressing Add — otherwise the typed name silently disappears.
+        if (authorDraft.trim()) addAuthor();
+        if (altTitleDraft.trim()) addAltTitle();
         mangaSubmitting = true;
         mangaError = null;
         mangaFieldErrors = {};
@@ -48,14 +92,20 @@
             const manga = await createManga(
                 {
                     title: mangaTitle.trim(),
-                    author: mangaAuthor.trim() || null,
+                    status: mangaStatus,
+                    authors: mangaAuthors,
+                    alt_titles: mangaAltTitles,
+                    genre_ids: mangaGenreIds,
                     description: mangaDescription.trim() || null
                 },
                 coverFile ?? undefined
             );
             mangaSuccess = `Created "${manga.title}".`;
             mangaTitle = '';
-            mangaAuthor = '';
+            mangaStatus = 'ongoing';
+            mangaAuthors = [];
+            mangaAltTitles = [];
+            mangaGenreIds = [];
             mangaDescription = '';
             coverFile = null;
         } catch (e) {
@@ -80,6 +130,9 @@
     let isDragOver = $state(false);
 
     const selectedManga = $derived(mangas.find((m) => m.id === chapterMangaId) ?? null);
+    const selectedMangaAuthors = $derived(
+        selectedManga ? selectedManga.authors.map((a) => a.name).join(', ') : ''
+    );
     const allChapterPagesValid = $derived(chapterPages.every((p) => !p.error));
     const canSubmitChapter = $derived(
         Boolean(chapterMangaId) &&
@@ -181,9 +234,6 @@
         }
         const message = e instanceof Error ? e.message : String(e);
         setMessage(message);
-        // ApiError doesn't carry the details object yet; the API surfaces
-        // the most actionable field in the message itself, so we keep
-        // setFields available for a future refinement and clear it now.
         setFields({});
     }
 </script>
@@ -217,15 +267,99 @@
                     <span class="field-error" role="alert">{mangaFieldErrors.title}</span>
                 {/if}
             </label>
+
             <label class="form-field">
-                <span>Author</span>
-                <input
-                    type="text"
-                    bind:value={mangaAuthor}
-                    maxlength="200"
-                    data-testid="manga-author"
-                />
+                <span>Status</span>
+                <select bind:value={mangaStatus} data-testid="manga-status">
+                    <option value="ongoing">Ongoing</option>
+                    <option value="completed">Completed</option>
+                </select>
             </label>
+
+            <div class="form-field">
+                <span>Authors</span>
+                <div class="token-row">
+                    {#each mangaAuthors as a (a)}
+                        <Chip label={a} variant="primary" onRemove={() => removeAuthor(a)} />
+                    {/each}
+                </div>
+                <div class="token-input-row">
+                    <input
+                        type="text"
+                        bind:value={authorDraft}
+                        onkeydown={(e) => {
+                            if (e.key === 'Enter') {
+                                e.preventDefault();
+                                addAuthor();
+                            }
+                        }}
+                        placeholder="Add author"
+                        maxlength="200"
+                        data-testid="manga-author-input"
+                    />
+                    <button
+                        type="button"
+                        class="icon-btn primary"
+                        onclick={addAuthor}
+                        disabled={!authorDraft.trim()}
+                        aria-label="Add author"
+                        title="Add author"
+                    >
+                        <Plus size={16} aria-hidden="true" />
+                    </button>
+                </div>
+            </div>
+
+            <div class="form-field">
+                <span>Genres</span>
+                <div class="genre-grid" data-testid="manga-genres">
+                    {#each genres as g (g.id)}
+                        <label class="genre-toggle">
+                            <input
+                                type="checkbox"
+                                checked={mangaGenreIds.includes(g.id)}
+                                onchange={() => toggleGenre(g.id)}
+                            />
+                            <span>{g.name}</span>
+                        </label>
+                    {/each}
+                </div>
+            </div>
+
+            <div class="form-field">
+                <span>Alternative titles</span>
+                <div class="token-row">
+                    {#each mangaAltTitles as t (t)}
+                        <Chip label={t} onRemove={() => removeAltTitle(t)} />
+                    {/each}
+                </div>
+                <div class="token-input-row">
+                    <input
+                        type="text"
+                        bind:value={altTitleDraft}
+                        onkeydown={(e) => {
+                            if (e.key === 'Enter') {
+                                e.preventDefault();
+                                addAltTitle();
+                            }
+                        }}
+                        placeholder="Add alternative title"
+                        maxlength="200"
+                        data-testid="manga-alt-input"
+                    />
+                    <button
+                        type="button"
+                        class="icon-btn primary"
+                        onclick={addAltTitle}
+                        disabled={!altTitleDraft.trim()}
+                        aria-label="Add alternative title"
+                        title="Add alternative title"
+                    >
+                        <Plus size={16} aria-hidden="true" />
+                    </button>
+                </div>
+            </div>
+
             <label class="form-field">
                 <span>Description</span>
                 <textarea
@@ -283,7 +417,9 @@
                         <option value="">Choose…</option>
                         {#each mangas as m (m.id)}
                             <option value={m.id}>
-                                {m.title}{#if m.author} — {m.author}{/if}
+                                {m.title}{#if m.authors.length > 0} — {m.authors
+                                        .map((a) => a.name)
+                                        .join(', ')}{/if}
                             </option>
                         {/each}
                     </select>
@@ -304,8 +440,8 @@
                         {/if}
                         <div class="preview-meta">
                             <span class="preview-title">{selectedManga.title}</span>
-                            {#if selectedManga.author}
-                                <span class="preview-author">{selectedManga.author}</span>
+                            {#if selectedMangaAuthors}
+                                <span class="preview-author">{selectedMangaAuthors}</span>
                             {/if}
                         </div>
                     </div>
@@ -472,6 +608,38 @@
         color: var(--success);
     }
 
+    .token-row {
+        display: flex;
+        flex-wrap: wrap;
+        gap: var(--space-2);
+        margin-bottom: var(--space-1);
+    }
+
+    .token-input-row {
+        display: flex;
+        gap: var(--space-2);
+    }
+
+    .token-input-row input {
+        flex: 1;
+        min-width: 0;
+    }
+
+    .genre-grid {
+        display: grid;
+        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
+        gap: var(--space-2);
+    }
+
+    .genre-toggle {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-2);
+        color: var(--text);
+        font-size: var(--font-sm);
+        cursor: pointer;
+    }
+
     .manga-preview {
         display: flex;
         align-items: center;
@@ -598,6 +766,17 @@
         color: var(--text);
     }
 
+    .icon-btn.primary {
+        background: var(--primary);
+        color: var(--primary-contrast);
+        border-color: var(--primary);
+    }
+
+    .icon-btn.primary:hover:not(:disabled) {
+        background: var(--primary-hover);
+        border-color: var(--primary-hover);
+    }
+
     .icon-btn.danger:hover:not(:disabled) {
         color: var(--danger);
     }

frontend/src/routes/upload/+page.ts

@@ -1,4 +1,5 @@
-import { listMangas, type Manga } from '$lib/api/mangas';
+import { listMangas, type MangaCard } from '$lib/api/mangas';
+import { listGenres, type Genre } from '$lib/api/genres';
 import type { PageLoad } from './$types';
 
 export const ssr = false;
@@ -6,7 +7,11 @@ export const ssr = false;
 export const load: PageLoad = async () => {
     // The chapter form needs a list of mangas to attach the new chapter
     // to. There's no ownership concept yet, so any authenticated user can
-    // see and add to any manga.
-    const { items } = await listMangas({ limit: 200, sort: 'title' });
-    return { mangas: items as Manga[] };
+    // see and add to any manga. Genres are needed for the create-manga
+    // form's picker.
+    const [{ items }, genres] = await Promise.all([
+        listMangas({ limit: 200, sort: 'title' }),
+        listGenres()
+    ]);
+    return { mangas: items as MangaCard[], genres: genres as Genre[] };
 };