chore: initial scaffold with running local stack and portal auth

Brings up Dezky's local development environment end-to-end:

Infrastructure (docker-compose):
- Traefik v3.7 reverse proxy with mkcert TLS (v3.2 couldn't speak Docker API 1.54)
- Postgres + Mongo + Redis with healthchecks and init script for per-service users
- Authentik 2025.10 (server + worker) as OIDC IdP
- Stalwart v0.16 mail server (image renamed from stalwartlabs/mail-server)
- OCIS 7.0 with PROXY_TLS=false and OCIS_CONFIG_DIR=/etc/ocis so init writes
  where the server reads
- Collabora office, plus the portal + provisioning service stubs
- Docker network aliases on Traefik so containers resolve auth.dezky.local etc.
  through the network (not host /etc/hosts)
- Docker socket mount parameterized for macOS Docker Desktop symlink path

Authentik provisioning (done via API after stack boot):
- ocis-provider (public client) + OCIS Files application
- dezky-portal provider (confidential) + Dezky Portal application
- Admin API token bound to akadmin manually since 2025.10's
  AUTHENTIK_BOOTSTRAP_TOKEN env var doesn't auto-materialize a token row

Portal (apps/portal):
- Nuxt 3 with nuxt-oidc-auth 1.0.0-beta.11 against generic 'oidc' preset
- Global auth middleware; login at /auth/oidc/login redirects to Authentik
- Visual implementation of Claude Design 'Auth' canvas: AuthShell, NodeMark,
  Auth* sub-components, design tokens as CSS custom properties
- Pages: auth/login, auth/expired, auth/disabled, index (post-login landing)
- mkcert root CA mounted into the portal so Node fetch trusts Authentik's
  self-signed cert (NODE_EXTRA_CA_CERTS) — dev only

Docs:
- AUTHENTIK-SETUP.md updated with manual token bind + portal provider scripted
  alternative
- NEXT-STEPS.md: Phase 1 and Phase 2 marked done with file locations and
  dev-mode caveats

Dev-mode shortcuts that need to be revisited before prod:
- skipAccessTokenParsing on the OIDC config
- NODE_EXTRA_CA_CERTS mkcert mount
- Bootstrap password still the generated value in .env
- Authentik admin token (dezky-bootstrap-token) is non-expiring

apps/portal/pages/auth/login.vue

@@ -0,0 +1,72 @@
+<script setup lang="ts">
+// Custom login page (nuxt-oidc-auth customLoginPage=true means it won't auto-bounce).
+// We intercept the click and kick off the OIDC flow via the module's helper.
+
+definePageMeta({ auth: false })
+
+const email = ref('')
+
+async function signIn() {
+  await navigateTo('/auth/oidc/login', { external: true })
+}
+</script>
+
+<template>
+  <AuthShell>
+    <AuthHeading
+      eyebrow="Sign in"
+      title="Welcome back"
+      body="Sign in to continue to your workspace."
+    />
+
+    <form @submit.prevent="signIn">
+      <AuthInput
+        v-model="email"
+        label="Work email"
+        type="email"
+        placeholder="you@example.com"
+        mono
+      />
+      <AuthButton type="submit" variant="primary">Continue with email</AuthButton>
+    </form>
+
+    <div class="divider">
+      <span class="line" />
+      <span class="or">OR</span>
+      <span class="line" />
+    </div>
+
+    <AuthButton variant="dark" @click="signIn">
+      <template #leading>
+        <UiIcon name="key" :size="14" />
+      </template>
+      Single sign-on (SSO)
+    </AuthButton>
+
+    <AuthFooterLink>
+      No account? Talk to your admin.
+    </AuthFooterLink>
+  </AuthShell>
+</template>
+
+<style scoped>
+.divider {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin: 18px 0;
+}
+
+.line {
+  flex: 1;
+  height: 1px;
+  background: var(--border);
+}
+
+.or {
+  font-family: var(--font-mono);
+  font-size: 10px;
+  color: var(--text-mute);
+  letter-spacing: 0.12em;
+}
+</style>