chore: initial project scaffold

Set up Mangalord with a Rust/axum backend, SvelteKit frontend, Postgres,
and Docker Compose deployment. Establishes the architecture and TDD
patterns the project will extend:

- Hexagonal-ish backend layering (domain / repo / storage / api) with
  a pluggable Storage trait (LocalStorage today, S3 as a future impl).
- Initial migration: users, mangas, chapters, bookmarks.
- Vertical slice for mangas (list, search, create, get) with
  #[sqlx::test] integration coverage and storage unit tests.
- SvelteKit frontend using Svelte 5 runes, typed API client, Vitest
  unit tests and Playwright e2e with route mocking.
- CLAUDE.md documenting layering, TDD/git/SemVer workflow rules, and
  extension points (tags, fulltext search, OCR, S3, auth).
- Project-scoped .claude/settings.json with permission allowlist for
  the toolchain (git, cargo, npm/vite, docker, psql, gh, doc fetches).

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

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

@@ -0,0 +1,69 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { listMangas, createManga, getManga } from './mangas';
+
+function ok(body: unknown): Response {
+    return new Response(JSON.stringify(body), {
+        status: 200,
+        headers: { 'content-type': 'application/json' }
+    });
+}
+
+function fail(status: number, body = ''): Response {
+    return new Response(body, { status });
+}
+
+describe('mangas api client', () => {
+    let fetchSpy: ReturnType<typeof vi.spyOn>;
+
+    beforeEach(() => {
+        fetchSpy = vi.spyOn(globalThis, 'fetch');
+    });
+    afterEach(() => {
+        vi.restoreAllMocks();
+    });
+
+    it('listMangas hits /mangas with no params by default', async () => {
+        fetchSpy.mockResolvedValueOnce(ok([]));
+        await listMangas();
+        expect(fetchSpy).toHaveBeenCalledTimes(1);
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/mangas$/);
+    });
+
+    it('listMangas encodes search, limit, offset', async () => {
+        fetchSpy.mockResolvedValueOnce(ok([]));
+        await listMangas({ search: 'one piece', limit: 10, offset: 20 });
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toContain('search=one+piece');
+        expect(url).toContain('limit=10');
+        expect(url).toContain('offset=20');
+    });
+
+    it('createManga POSTs JSON', 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'
+            })
+        );
+        const m = await createManga({ title: 'Berserk', author: 'Miura' });
+        expect(m.title).toBe('Berserk');
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('POST');
+        expect(init.headers).toMatchObject({ 'content-type': 'application/json' });
+        expect(JSON.parse(init.body as string)).toEqual({ title: 'Berserk', author: 'Miura' });
+    });
+
+    it('getManga throws ApiError on non-2xx', async () => {
+        fetchSpy.mockResolvedValue(fail(404, 'not found'));
+        await expect(getManga('missing')).rejects.toMatchObject({
+            name: 'ApiError',
+            status: 404
+        });
+    });
+});