admin: phosphor icons replace hand-drawn svgs and text-character glyphs

health strip marks, menu ticks, chip crosses, the search magnifier, the checkbox check and the back arrows all come from @phosphor-icons/react now, pinned exactly and entered in the license ledger. changelog and version bump for 0.0.15, including the bundle budget raise to 900000 bytes.

licenses/inventory.zon

@@ -150,6 +150,12 @@
         .note = "The dialog, alert dialog, tab and select behaviour of the admin UI, bundled into the JavaScript embedded in the binary. The first Apache-2.0 npm dependency this project has taken, and the first non-MIT one: Mokhtar Mial accepted Apache-2.0 inbound for nxdns on 2026-08-12, which is the decision that let these four ship. Apache-2.0 Section 4 attribution is satisfied by carrying the licence text in THIRD-PARTY-NOTICES, which the file below does; none of the four ships a NOTICE file, so 4(d) adds nothing. All four carry a byte-identical LICENSE. In the tarballs and in the image.",
         .file = "react-aria-apache-2.0.txt",
     },
+    .{
+        .component = "Phosphor Icons",
+        .version = "@phosphor-icons/react 2.1.10",
+        .note = "The icon set of the admin UI — carets, ticks, crosses, the search magnifier, status marks and back arrows — bundled into the JavaScript embedded in the binary. Tree-shaken: only the imported icon components ship. The npm tarball carries the LICENSE this text is copied from.",
+        .file = "phosphor-mit.txt",
+    },
     .{
         .component = "clsx",
         .version = "clsx 2.1.1",