Add EMAIL_DOMAIN to wrangler vars for both dev and production

Was only set in .dev.vars, causing "No sender address available" in
production. Moved to wrangler.jsonc vars since it's not sensitive.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bchapuis

apps/api/.dev.vars.example

@@ -1,8 +1,6 @@
 WEB_HOST=http://localhost:3001
 WEBSITE_URL=http://localhost:3002
 
-EMAIL_DOMAIN=dafthunk.com
-
 CLOUDFLARE_ENV=development
 CLOUDFLARE_ACCOUNT_ID=CHANGE_ME
 CLOUDFLARE_API_TOKEN=CHANGE_ME

apps/api/wrangler.jsonc

@@ -215,7 +215,8 @@
    */
   "vars": {
     "WEB_HOST": "https://app.dafthunk.com",
-    "WEBSITE_URL": "https://www.dafthunk.com"
+    "WEBSITE_URL": "https://www.dafthunk.com",
+    "EMAIL_DOMAIN": "dafthunk.com"
   },
   "env": {
     "production": {
@@ -390,7 +391,8 @@
       },
       "vars": {
         "WEB_HOST": "https://app.dafthunk.com",
-        "WEBSITE_URL": "https://www.dafthunk.com"
+        "WEBSITE_URL": "https://www.dafthunk.com",
+        "EMAIL_DOMAIN": "dafthunk.com"
       },
       "triggers": {
         "crons": ["* * * * *"]