feat: enhance contact page with newsletter and social cards

Add newsletter_card component with :card and :inline variants to share
between footer and contact page. Add social_links_card component with
full-width icon+text cards for better discoverability.

Improve contact_form with optional email link and response time display,
keeping important contact info above the fold. Reorganize contact page
layout with form on left, info cards on right.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ROADMAP.md

@@ -339,29 +339,7 @@ This ensures sellers never unknowingly sell at a loss due to Printify price chan
 
 ## Quick Wins (Low Effort)
 
-### Enhanced Contact Page
-**Status:** Not implemented
-**Effort:** Small
-
-The current contact page has subtle footer social icons that are easy to miss. Improvements:
-
-1. **Newsletter signup card** - Prominent card encouraging newsletter subscription as the best way to stay updated (already in footer, but deserves dedicated placement)
-
-2. **Social media links card** - Full-width card listing social platforms with icons and text labels:
-   ```
-   [Instagram icon] Instagram
-   [Patreon icon]   Patreon
-   [TikTok icon]    TikTok
-   [Facebook icon]  Facebook
-   [Pinterest icon] Pinterest
-   ```
-   This makes social links more discoverable than the current small footer icons.
-
-**Implementation:**
-- Add `newsletter_card/1` component to ShopComponents
-- Add `social_links_card/1` component with configurable platforms
-- Update contact page template to include both cards
-- Consider making platforms configurable via theme settings
+*(None pending)*
 
 ---
 
@@ -488,3 +466,9 @@ The project is currently named `simpleshop_theme` (reflecting its origins as a t
 - Current page is not a link (avoids self-links)
 - Logo links to home except when on home page
 - `aria-current="page"` with visual underline indicator
+
+### Enhanced Contact Page ✅
+- `newsletter_card` component with `:card` and `:inline` variants (shared with footer)
+- `social_links_card` component with icon + text label cards
+- Contact form with integrated email link and response time
+- Reorganized layout: contact form left, info cards right