Move the console onto ReUI PRO

Install ReUI (MCP, skill, @reui registry, Tailwind v4, shadcn base-nova) and move
the shared UI onto it: Button, Tag, Check, Input/Textarea, Segmented, Alert, Panel,
Dialog, Tooltip, Menu and Select (Popover), Toast (sonner), the Table frame
(DataGrid), the Dashboard KPI strip, the shnt Ops palette, Geist and the type scale.

Design only: behaviour, texts and roles are unchanged. Tests that asserted the old
DOM were updated; the tests now format numbers in English wherever they run.
docs/reui-migration-plan.md records the plan and its decisions.

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

dev/check-parity.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+# Compares the dev console (5380) against the reference one (5381).
+# Usage: ./check-parity.sh [path]   (default: /)
+#
+# It compares CONTENT, not bytes: line endings are normalised before hashing.
+# This is needed because upstream's .gitattributes uses `* text=auto`, so the
+# repository stores LF and the checkout converts according to the platform: our
+# tree on Linux has LF, and the official Docker image ships CRLF because it was
+# built on Windows. Without normalising, two identical files would come out
+# different by 7,426 extra bytes (one per line, in the case of index.html).
+set -euo pipefail
+
+PATH_="${1:-/}"
+DEV="http://127.0.0.1:5380${PATH_}"
+REF="http://127.0.0.1:5381${PATH_}"
+
+for url in "$DEV" "$REF"; do
+  if ! curl -sfo /dev/null "$url"; then
+    echo "FAILED: $url does not answer"
+    exit 1
+  fi
+done
+
+normalised_hash() {
+  curl -s "$1" | tr -d '\r' | sha256sum | cut -d' ' -f1
+}
+
+d=$(normalised_hash "$DEV")
+r=$(normalised_hash "$REF")
+
+echo "dev $d"
+echo "ref $r"
+
+if [ "$d" = "$r" ]; then
+  echo "IDENTICAL"
+  exit 0
+else
+  echo "DIFFERENT"
+  exit 2
+fi