Render game tags as lists

[engleek]

Fixes #201.

Game cards and the game page rendered tags as bare chips inside a <div>, spaced only by CSS margins. Screen readers, copy-paste and text tools got one run-on word, e.g. "soloplatformroguelikeaction".

Change

• TagList (app/components/TagList.jsx) renders tags as a list labelled "Tags", one li per chip, spaced with gap.
• Game page: with linked, each tag still links to /games?tags=<name>, now URL-encoded.
• Cards and the game page use it. I checked both in the browser; they look as before.

Not changed: the tag filter on /games. Those chips are clickable but aren't buttons, so they can't be reached with the keyboard. That's a separate accessibility fix, worth its own issue.

Tests

A new e2e test opens /games and checks:

• the first card has a list named "Tags" with several items;
• its rendered text separates the names;
• the game page also has a tag list.

On main: it fails. Locally: the full e2e suite (38) and the unit and story tests (51) pass.

🤖 Generated with Claude Code

[engleek]

Superseded by #249, which merged this change into main.