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/relative-paths.test.mjs

@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest'
+import { readdirSync, readFileSync, statSync } from 'node:fs'
+import { dirname, join, resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+/*
+Upstream is one page, so a relative path in its markup always resolves against
+the root. This console has real routes: a relative `sso/login` link drawn at
+`/dashboard/` goes to `/dashboard/sso/login`. It happened twice on 2026-09-30
+(the SSO Redirect URI and the SSO login link, the second one found on the home
+server as a 404), so every path in the markup has to hang from the root
+(`publicUrl`, `urlApi`), and this is what keeps a literal one from coming back.
+
+It lives in `dev/` and not beside the code for the reason
+`master-switch-signal.test.mjs` gives: `src/` compiles without node's types, and
+a `node:fs` in there passes the suite and breaks `tsc -b`.
+*/
+const SRC = resolve(dirname(fileURLToPath(import.meta.url)), '../src') + '/'
+
+function files(dir) {
+  return readdirSync(dir).flatMap((n) => {
+    const p = join(dir, n)
+    if (statSync(p).isDirectory()) return files(p)
+    return /\.tsx$/.test(n) && !/\.test\./.test(n) ? [p] : []
+  })
+}
+
+const RELATIVE = /\b(?:href|src|action)=["'`](?!https?:|mailto:|data:|#|\/)[^"'`{}\s]+["'`]/g
+
+describe('paths in the markup', () => {
+  it('no literal href, src or action is relative to the route it is drawn at', () => {
+    const found = files(SRC).flatMap((f) =>
+      [...readFileSync(f, 'utf8').matchAll(RELATIVE)].map((m) => `${f.slice(SRC.length)}: ${m[0]}`),
+    )
+    expect(found).toEqual([])
+  })
+})