refactor(console): restyle the first-run wizard and credential request (#192)

The first-run wizard (token, CA and admin steps) and the "Make a
credential request" page move onto the @cryptos-pki/ui kit: Field and
Input for every form control, Notice for the fingerprint warnings and
errors, FingerprintConfirm for the CA reconfirm step, CopyBlock and
KeyBackupStep for the in-browser key flows, and Stepper for the
wizard's progress strip. Routes, API calls and refusal wording are
unchanged.

These were also the last importers of the local components/ui/button
and components/ui/input, the local copy-block and key-backup-step.
diagnostics-copy (shown on every sign-in gate) picks up the kit's
Button too, which was its only remaining local import. With nothing
left importing them, components/ui/, copy-block.tsx and
key-backup-step.tsx (plus their tests) are removed, closing out #137's
design review.

Each rebuilt page gets an axe check of its initial state alongside the
existing behavioural tests, which stay green unchanged.

Refs #187
Refs #157

Signed-off-by: Bugs5382 <12115015+Bugs5382@users.noreply.github.com>
Co-authored-by: Bugs5382 <12115015+Bugs5382@users.noreply.github.com>

Author: Bugs5382

AGENTS.md

@@ -32,7 +32,8 @@ components, named exports from `src/index.ts`) and
   The "Make a credential request" page `/request-credential` is outside the gate too, and makes
   no network calls at all: it must not import the Fleet Manager client.
 - `src/components/layout/` - app shell: header, sidebar nav, wordmark, theme toggle, auth gate.
-- `src/components/ui/` - shadcn/ui primitives (button, card, badge, separator).
+  There is no local `src/components/ui/`: every primitive comes from `@cryptos-pki/ui`, and
+  `src/components/` holds only app-specific parts (wizards, dialogs, the topology graph).
 - `src/context/` - `theme.tsx` (dark/light, persisted) and `auth.tsx` (browser-mTLS gate stub).
 - `src/lib/` - `mock.ts` (the typed Node model), `mock-fixtures.real.ts`/`mock-fixtures.stub.ts`
   (the fixture data every mock store's `seed()` copies from, swapped by `vite.config.ts` at build