v0.27.0: One Library, and its filters finally organised

One Library, and its filters finally organised

Browse was a second Library. /browse?genre=Horror ran the same search over the same collection and drew it
in the same grid as /library?genres=Horror — the only thing it had of its own was the wall of genre tiles.
So the tab is gone, and the wall's useful half has moved to where you were going to end up anyway.

The Library's own controls had drifted into a pile: three horizontally-scrolling rows of chips, one of them
seven wide, mixing four sort options with a Filters button, an 18+ toggle and a Select toggle — nothing
saying which were sorts and which were filters. Behind the Filters button, the genre list was a flat wall of
ninety-three unsorted, uncounted, unsearchable words.

All of it now lives in one panel with labelled sections — Sort by, Library, Read state,
Status, Format, Genres. On a laptop the panel sits down the left of the grid and stays there. On
a phone it opens as a proper sheet: one Filters button instead of a row of seven chips.

What came across from Browse:

• Genres are counted and ranked, biggest first, each with a small mosaic of covers from that shelf — the
  part of the old tile wall that made it worth looking at, at a size that suits a list.
• Formats stay separate from genres. Manhwa covers 161 of the 2,132 series on the library this was built
  against, so ranked by size it outranks every actual genre while saying nothing about what a book is like.
• Surprise me, the random-series button, is now beside the Library title.
• A search box over the genres, so ninety-three of them is a list rather than a wall.

Two things fixed on the way past:

• The genre list used to come from an endpoint that returns genres exactly as they are spelled, while the
  filter matches them case-insensitively. That is 100 chips for 93 genres: "Martial arts" and "Martial Arts"
  appeared as two, and either one returned the same series. They are now one.
• Picking a library used to filter the grid while the Filters badge said nothing was filtered, because the
  library tabs were counted as navigation rather than as a filter. Now everything that narrows the shelf
  counts, and Clear all clears all of it.

The publication statuses — Ongoing, Completed, Hiatus, Cancelled — were being title-cased in code rather
than translated, so they read in English in all eight languages. They are translated now.

Large displays have been a column short this whole time

Found while measuring the new layout, and older than it. Five cover grids — library, search (twice),
discover and the admin picker — each ended with a step like min-[1800px]:grid-cols-10, and not one of
them had ever applied. Tailwind emits that kind of breakpoint before its own named ones, so on a 1920px
display the earlier 2xl rule came later in the stylesheet and won.

Nothing failed, because a grid one step short of its own source code still looks like a grid. Measured in a
browser at 2560px: seven columns of 314px covers where the class list asked for ten.

The extra breakpoints are now declared properly, and a test refuses any responsive step that a later rule
would override. It found the fifth grid on its first run.

The last of the MangaRead covers

Different fault from v0.26.3, and this one was doubling the listing.

The listing parser reads the same series link out of three different pieces of markup, and one of the three
patterns dropped the trailing slash from the URL while the other two kept it. On any site that writes the
slash — MangaRead does — the check for "have I already seen this series?" never matched. Every series came
back twice: once properly, and once more named after its alt text and carrying no cover at all.

Measured against a live MangaRead listing: twelve series parsed as twenty-four. Because a source page keeps
the first 24 results, that also means half of what MangaRead offered on Discover was a copy of the other
half. The proper entries came first and the blank ones after, which is why it looked like a few missing
covers rather than a doubled list.

The three passes now agree on the key. The URL a series is stored under is untouched, so nothing already
in a library is affected. This also fixes the reverse case, which nobody had reported: a site writing the
slash on its headings but not its thumbnails loses every cover rather than half of them.

It hid for so long because every fixture in the test file wrote URLs without a trailing slash — the one
shape that breaks was the one shape the tests never used. It is now asserted in both directions.