Show blocked counts on the Blocking page, and reveal + CNAME on hover

The Blocking page shows how many queries each blocklist, and the rules
together, blocked in the last 24 hours (with statistics on). The + CNAME
button on A/AAAA rows shows when the row is hovered or focused, and
always on touch screens.

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

docs/blocking.md

@@ -194,6 +194,10 @@ names, and the clients with the most blocked queries (`jarl stats summary`,
 breakdown blocklist`). Blocked answers are left out of the NXDOMAIN figures, which
 are about names that really don't exist.
 
+The Blocking page shows the last 24 hours too: a **Blocked (24h)** column
+for each list, and one count for your rules together (named logs which
+policy zone matched, not which rule in it).
+
 Without statistics named doesn't log what it blocks at all.
 
 ## Memory and performance