Fix upload notification email dark text on dark background; v2.0.16

Body text was #2c2417 inside the dark branded email wrapper. Updated
to light brand colors: #c8c0ac body, #f0ead8 emphasis, #c9a84c filename.

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.15",
+  "version": "2.0.16",
   "type": "module",
   "scripts": {
     "dev": "vite",