feat: F4.6g4 the Gnutella window, measured against Java's

GnutellaWindowRun uses Java's Gnutella window on terminal-net beside the
line of GnutellaRun's story "search". The core cancels a search as Java
does (every connection of the program's own requests closed, passed-on
queries kept), lets the number of peers change and lists /peer2peer's
files; the room takes the window's actions and sends its view; the editor
shows Java's four tabs with Java's symbols. Not adopted from Java: a number
of peers of one digit only, a results table that keeps the last search's
rows, a files table that lags behind the folder.

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

packages/editor/src/desktop/desktop.css

@@ -1202,3 +1202,52 @@
 .personal-firewall-table tr {
   cursor: pointer;
 }
+
+/* Gnutella (GUIApplicationPeerToPeerAnwendungWindow): four tabs with Java's
+ * symbols — the network, the search, the files, the settings. */
+.gnutella-page {
+  flex: 1;
+  min-height: 0;
+  overflow: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.gnutella .mail-tabs button {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.gnutella .mail-tabs img {
+  width: 24px;
+  height: 24px;
+}
+
+.gnutella-label {
+  margin: 0;
+}
+
+.gnutella input {
+  min-height: 32px;
+  padding: 0 6px;
+  border: 1px solid #a0a0a0;
+  background: #ffffff;
+  color: #000000;
+  font: 16px Dialog, sans-serif;
+}
+
+.gnutella [aria-invalid='true'] {
+  border-color: #ff0000;
+  color: #ff1414;
+}
+
+.gnutella-table td {
+  padding: 6px;
+  overflow-wrap: anywhere;
+}
+
+.gnutella-table tbody tr[tabindex] {
+  cursor: pointer;
+}