Backend:
- Migration 0005_search.sql enables pg_trgm and adds GIN indexes
(gin_trgm_ops) on mangas.title and on mangas.author (partial, WHERE
author IS NOT NULL).
- repo::manga::list keeps the existing substring (ILIKE) clause and
adds the `%` operator on title + author so the search tolerates typos
('narto' → 'Naruto'). Both branches share the trgm index. A second
count(*) query (same WHERE clause, indexed) yields the total without
scanning twice in any meaningful sense.
- New ListSort enum (Recent / Title) interpolated into ORDER BY from a
hard-coded match — never from request input, so the format!() is not
a SQL-injection seam. Default stays Recent (created_at DESC).
- api::mangas accepts `?sort=recent|title` (snake_case) via serde and
returns `page.total` as a number instead of null.
- api::pagination::PagedResponse gains a `with_total` constructor.
Backend coverage in tests/api_mangas.rs (4 new cases plus the existing
list_is_empty_initially updated to assert total: 0):
- list_returns_total_count_independent_of_pagination — limit=2 with 3
rows returns 2 items and total=3.
- search_via_trigram_tolerates_typos — `?search=narto` finds Naruto.
- list_sort_title_orders_alphabetically — three out-of-order inserts
come back A→Z.
- search_reflects_filtered_total — search narrows total to 1.
Frontend:
- lib/api/mangas.ts gains a `MangaSort` type and threads `sort` through
listMangas's query-string builder.
- Home page renders a "Sort" select (Recent / Title A→Z) that re-runs
the list query, and shows "Showing N of M" when total is present.
Lockstep version bump to 0.8.0.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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