feat: add a Pokédex tab, and fix the learnsets it exposed

[TechLuddite]

Joseph asked for a Pokédex section — full details, a decent sized picture, a bio if we're sure the data is canonical, and inline link buttons on the Stats page to jump straight there.

The Pokédex tab

One Pokémon at a time, picture first:

• Official artwork in its own inset LCD panel, not the 96px battle sprite.
• The bio, quoted from the games, with the game named underneath it — "From the Pokédex in Pokémon Shield". That attribution is the whole reason it's safe to show: nothing on the page is something we wrote about a Pokémon, it's either the game's own words or a number out of the dex.
• Vital statistics — height, weight, gender split, catch rate with a word on which end of the scale that is, egg groups, egg cycles, growth rate, generation.
• Abilities with what each one actually does, hidden ones marked, and a quiet "not in the sim yet" tag where the Battle tab doesn't model it — same honesty rule the ability picker already follows.
• Base stats and defensive type matchups, with 4× and ¼× shown properly, and a note that abilities change them in a real battle.
• The evolution line and what each step takes. Every route is kept where there's more than one ("Level up near a special rock or Use a Leaf Stone"), and each stage is clickable.
• Every move it can learn, toggling between the order it learns them as it levels up and the whole list, with a search box.

Stats → Pokédex

An inline icon button sits beside every name in the Stats table and in the expanded card. It stops the click from also expanding the row, and it carries a counter alongside the id so pressing the same link twice still moves the Pokédex.

The bug this turned up

Baking the level-up data meant working out which game a learnset comes from, and the existing answer was wrong twice over:

• PokéAPI's Japan-only Gen 1 re-releases were added to the API years late and carry version-group ids above Scarlet/Violet. Ranked on id they won "latest game" for most of Gen 1. Mewtwo had 43 moves, all from Red and Blue — Barrier, Bide, Skull Bash. Bulbasaur had 23. 187 Pokémon were stranded like that.
• The Legends games and battle-only spin-offs have the opposite problem: full entries, tiny move pools. In Legends: Arceus a Zubat knows seven moves and there are no TMs at all.

scripts/version-groups.mjs now holds the main-series list with the reason each exclusion is there, and both bakes import it, so a move's level and the learnset it sits in always come from the same game. Mewtwo is on 102 moves, Bulbasaur on 48.

Only learnsets moved in pokedex.json — 444 entries changed, 0 stats, types, abilities, names or sprites. 93 shrank, all Pokémon that had been drawing their moves from a battle-only spin-off; what's left is what they can actually learn in Scarlet/Violet. There's a changelog line saying so, because Machamp losing 18 options is the kind of thing Joseph notices.

Data

npm run refresh-species (scripts/build-species.mjs) writes src/data/species.json and src/data/abilities.json, committed like the rest — still nothing fetched at runtime. LIMIT=20 runs it over a slice for a quick check. The bake asserts the artwork URL it builds matches the one PokéAPI reports, so a moved path fails there rather than on a phone. All 1025 Pokémon came back with artwork and a modern-game bio.

Tests

npm run test:run — 353 pass (up from 314).

• src/lib/dex.test.js — matchup multipliers, unit conversions, gender, evolution steps, learnset splitting. Values derived by hand from the type chart, same as battle.test.js.
• src/data/species.test.js — guards the bake: every Pokémon covered, every bio present and naming its game, no raw Game Boy line breaks, evolution conditions readable and grammatical, every level pointing at a real move, artwork for everyone, and a regression check that Gen 1 isn't back on its Red/Blue learnset.

Verified in a real browser at desktop and phone widths — including that the new toggle style doesn't leak onto the battle screen's move buttons, which carry data-on on every slot.

npm run build is green and dist/CNAME survives.

🤖 Generated with Claude Code

https://claude.ai/code/session_01E63KHsTdwuRVEzKx7sBK1Y

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Generated by Claude Code