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/components/auth/AuthButton.vue

@@ -0,0 +1,80 @@
+<script setup lang="ts">
+withDefaults(
+  defineProps<{
+    variant?: 'primary' | 'dark' | 'ghost'
+    fullWidth?: boolean
+    type?: 'button' | 'submit'
+    disabled?: boolean
+  }>(),
+  {
+    variant: 'primary',
+    fullWidth: true,
+    type: 'button',
+    disabled: false,
+  },
+)
+</script>
+
+<template>
+  <button
+    :type="type"
+    :disabled="disabled"
+    :data-variant="variant"
+    :data-full-width="fullWidth ? '' : null"
+  >
+    <slot name="leading" />
+    <slot />
+  </button>
+</template>
+
+<style scoped>
+button {
+  height: 40px;
+  padding: 0 16px;
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 13px;
+  font-family: inherit;
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  transition: filter 120ms ease, transform 60ms ease;
+}
+
+button[data-full-width] {
+  width: 100%;
+}
+
+button[data-variant='primary'] {
+  background: var(--accent);
+  color: var(--accent-fg);
+  border: 1px solid var(--accent);
+}
+
+button[data-variant='dark'] {
+  background: var(--text);
+  color: var(--bg);
+  border: 1px solid var(--text);
+}
+
+button[data-variant='ghost'] {
+  background: transparent;
+  color: inherit;
+  border: 1px solid var(--border);
+}
+
+button:hover:not(:disabled) {
+  filter: brightness(0.96);
+}
+
+button:active:not(:disabled) {
+  transform: translateY(1px);
+}
+
+button:disabled {
+  opacity: 0.55;
+  cursor: not-allowed;
+}
+</style>