Jev picks a Signal's icon, on the server's key, and each Signal counts its items (#263)

Jev chooses among options and cannot name one, so the page searches Font Awesome's index for each
word of the Signal's name, words and sentence, the best six each, and offers the likeliest 40.
POST /api/signals/icon asks a choice question on the server's TYPESAFE_KEY and answers with one
of those offered, never another. "Let Jev pick" in the icon picker, and a Signal made without an
icon gets one a moment after. Tried against TypeSafe: for AI Development, laptop-code 0.45 just
ahead of robot 0.40.

Each Signal's row says "12 items · 3 unread", as a feed's row counts its own, in place of its
words; /api/signals gives `items` beside `unread`, by the same rules as its list.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/types.ts

@@ -95,6 +95,8 @@ interface Signal {
   description: string | null;
   /// A Font Awesome Free icon, `solid/robot`, in place of its initials (#261).
   icon: string | null;
+  /// The items it holds, read or not, and of those the unread.
+  items: number;
   unread: number;
 }