Update summary.md for Phase 18b

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

summary.md

@@ -12,7 +12,7 @@
 >    Include file-level details in the commit body when the change is non-trivial.
 
 ## Last Updated
-2026-02-25 — Phase 18: Authentik OAuth/OIDC SSO + email change
+2026-02-25 — Phase 18b: Favicon contrast fix + email template redesign
 
 ## Project Overview
 Fabled Assistant is a self-hosted note-taking and task-tracking application with
@@ -670,6 +670,7 @@ When adding a new migration, follow these conventions:
 - Invitation and password reset emails with branded HTML templates
 - Per-user notification preferences (task reminders, security alerts)
 - Admin SMTP configuration via Settings UI with test email
+- **Shared email template** (`_email_html` in `email.py`): gray outer background, white card, indigo header with inline SVG logo (`_EMAIL_LOGO_SVG`) + "Fabled Assistant" wordmark, content area, footer; used by all six email types (security alert, password reset, reset success, invitation, task reminder, test email)
 
 ### Logging & Observability
 - Single `app_logs` table: audit (security events), usage (API requests), error (unhandled exceptions)
@@ -689,6 +690,7 @@ When adding a new migration, follow these conventions:
 - Toast notifications (success/error/warning, 4s auto-dismiss)
 - DOMPurify sanitization on all rendered markdown
 - **Site-wide max-width:** List/chat/settings views 1200px; editor pages 1400px; note/task viewer layout 1400px (content area 1100px)
+- **Favicon:** `frontend/public/favicon.svg` — light mode uses indigo brand color (`#6366f1` fill, `#4f46e5` stroke, `#a5b4fc` lines); dark mode uses light gray; gold sparkle always visible; `@media (prefers-color-scheme: dark)` in SVG `<style>`
 
 ### Infrastructure
 - Multi-stage Dockerfile: Node build → Python runtime, auto-migration on startup