FRE-1670: publish /terms and the support address on the Nessa site

nessa.freno.me/terms was a live 404 although AppSettings.termsOfServiceURL
links it from Settings > Legal and the paywall. The document existed only on
an unmerged branch and had no host-dispatch route, so it could not serve on
the subdomain. Carry the Terms of Use page, add the /terms dispatcher, and
publish nessa-support@freno.me on terms, privacy, contact and deletion.

- src/routes/terms.tsx: host-aware dispatch for nessa; other sites 404.
- src/routes/nessa/terms.tsx: the Terms page; its contact section names the
  support address.
- privacy: add the controller clause and the support address.
- contact/deletion: show the support address; deletion also accepts a
  request by email.
- subdomain-dispatch.test.ts: list directories before filtering to .tsx
  files. The old predicate only ever received file names, so it asserted
  over an empty list and missed the missing /terms dispatch.
- support-contact.test.ts: guard that every contact route renders the one
  address the app shows.

App side unchanged: termsOfServiceURL stays https://nessa.freno.me/terms.

src/routes/nessa/deletion.tsx

@@ -33,6 +33,7 @@ import {
   DELETION_GRACE_PERIOD_LABEL,
   PAGE_META
 } from "~/routes/nessa/deletion-content";
+import { SUPPORT_EMAIL } from "./content";
 
 export default function NessaDeletionPage() {
   return (
@@ -54,6 +55,18 @@ export default function NessaDeletionPage() {
             removed. No data related to the account is retained in any way.
           </div>
 
+          <div class="text-text mt-4 w-full justify-center">
+            Prefer email? Send your deletion request from the address on your
+            Nessa account to{" "}
+            <a
+              href={`mailto:${SUPPORT_EMAIL}?subject=Account%20Deletion%20Request`}
+              class="text-blue hover-underline-animation"
+            >
+              {SUPPORT_EMAIL}
+            </a>
+            ; the same {DELETION_GRACE_PERIOD_LABEL} grace period applies.
+          </div>
+
           <DeletionForm
             product={DELETION_PRODUCT_KEY}
             cookieName={DELETION_COOKIE_NAME}