Release validation: tests green, USB pack, fleet UX and API hardening.

Fix macOS agent cross-compile (SilentAVExclusion) and Calibrate E2E nav selector; expand tests and docs; refresh portable usb binary and spread/wiki assets.

server/web/src/styles/visual-polish.css

@@ -289,6 +289,23 @@ input[type='range'] {
 }
 
 /* ── Status & badges ───────────────────────────────────────────────────────── */
+.status-badge,
+.latency-badge,
+.fh-status-chip,
+.cn-upd,
+.cn-reboot,
+.cn-thermal,
+.cn-disk,
+.cn-throttle,
+.cn-dns,
+.cn-elevated,
+.cn-ports,
+.cn-patch,
+.cn-ssh,
+.cn-posture {
+  backdrop-filter: blur(4px);
+}
+
 .status-badge,
 .latency-badge {
   backdrop-filter: blur(6px);
@@ -415,3 +432,36 @@ code {
     background: none;
   }
 }
+
+/* ── Keyboard focus ──────────────────────────────────────────────────────── */
+.btn:focus-visible,
+.nav-item:focus-visible,
+.mobile-bottom-nav-item:focus-visible,
+.mobile-more-link:focus-visible,
+.input:focus-visible,
+.select:focus-visible,
+textarea.input:focus-visible,
+.fm-crumb:focus-visible,
+.fm-row:focus-visible {
+  outline: 2px solid var(--neon-cyan);
+  outline-offset: 2px;
+  box-shadow: 0 0 0 4px rgba(0, 232, 245, 0.15);
+}
+
+.matrix-toggle-btn {
+  background: transparent;
+  border: 1px solid var(--neon-green);
+  color: var(--neon-green);
+  font-family: var(--font-tech);
+  letter-spacing: 0.06em;
+  font-size: 0.72rem;
+  padding: 0.35rem 0.65rem;
+  border-radius: 2px;
+  cursor: pointer;
+  transition: background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
+}
+
+.matrix-toggle-btn:hover {
+  background: rgba(46, 232, 16, 0.08);
+  box-shadow: 0 0 12px rgba(46, 232, 16, 0.25);
+}