Add notify-on-answer email and save-as-image for Q&A; v1.0.10

- Contact form: notifyOnAnswer checkbox (shown for Bible Questions only)
- Contact route: stores notifyOnAnswer flag on question record
- Email: buildQuestionAnsweredEmailTemplate for branded notification
- Questions route: sends notification email on approve when notifyOnAnswer + email + answer are set
- Q&A section: Canvas API "Save as image" button generates 1080x1080 PNG quote card

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "1.0.9",
+  "version": "1.0.10",
   "type": "module",
   "scripts": {
     "dev": "vite",