Show a ticket's type on the card

[EdmondDantes]

Feature

Type a ticket — bug, feature, refactor, design, research, chore — with an icon and a very faint tint on the card, the way Jira does.

The server already sends this

IssueType is a real enum in php-claw, ProjectStore::setIssueType() exists, and type is already on every issue frame (Server.php:687). So the UI half is unblocked: only the create path is missing on the server (addIssue() takes no type).

Sketch

• Type: type?: IssueType on Issue (src/types/domain.ts) — it is missing today even though the server sends it.
• UI: a small type chip or icon on Card.tsx plus a faint background tone. The left border is already the status colour (--st), so the type should read as icon and tint, not as a second border.
• The create dialog picks the type, beside tags and workflow.

Acceptance

• A ticket's type shows on its card without fighting the status colour, in light and dark.