Adds a separate API-token section under /users/settings (distinct from
the beacon-monitor token list, since API tokens grant full account
access). The plaintext is surfaced exactly once via flash on creation;
only the SHA-256 hash is persisted, so revocation is the only path back
if the user loses it.
Also fixes the openapi.yaml link on /docs/api: the relative path
resolved to /docs/openapi.yaml from a no-trailing-slash URL and 404'd.
Two issues made docs/api hard to read:
1. The site's custom Markdown parser only recognized `- ` bullets,
so the README's `* ` bullets rendered as a single run-on paragraph
with literal asterisks. Extended the parser (and tests) to accept
the full CommonMark bullet set: `-`, `*`, `+`.
2. The shared .markdown-content container is 88rem wide. Comfortable
for /algo's wide tables but uncomfortable for monospace prose,
which prefers ~80ch. Added a .api-docs modifier class on the
/docs/api page that drops max-width to 60rem, allows table
cells to wrap, and slightly downsizes headings.
