feat: add product-aware deletion emails and subdomain deletion/downloads routes

- Extend DeletionForm with product discriminator and configurable cooldown cookie
- Extract env-free deletion email helpers into deletion-email.ts with Lineage/Nessa branding
- Make misc.sendDeletionRequestEmail mutation product-aware (subject, html content, cookie)
- Replace legacy /deletion/life-and-lineage page with 308 redirect to lineage subdomain
- Add Lineage and Nessa subdomain deletion route modules with shared content components
- Add Lineage downloads route modules with shared content
- Update privacy policy deletion link to lineage subdomain

src/routes/deletion/life-and-lineage.test.ts

@@ -0,0 +1,46 @@
+/**
+ * Regression test for the legacy `/deletion/life-and-lineage` route (task 11).
+ *
+ * The route was converted from a rendered page into a 308 permanent redirect
+ * to `lineage.freno.me/deletion`. Because the route file is a SolidStart
+ * server module, this is a STATIC SOURCE AUDIT (same pattern as the
+ * `misc.test.ts` regression tests) asserting:
+ *  - The route exports a `GET` handler (API-route redirect, not a page).
+ *  - The response status is 308 (permanent).
+ *  - The `Location` header derives from the centralized
+ *    `LEGACY_DELETION_REDIRECT_TARGET` constant (not a hardcoded literal), so
+ *    the unit test in `deletion-content.test.ts` is the single source of
+ *    truth for the destination.
+ *  - No page component / DeletionForm import remains (the form moved to
+ *    `src/routes/lineage/deletion.tsx`).
+ */
+import { describe, it, expect } from "bun:test";
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+
+const SOURCE = readFileSync(
+  join(import.meta.dir, "life-and-lineage.tsx"),
+  "utf8"
+);
+
+describe("Legacy /deletion/life-and-lineage — redirect (task 11)", () => {
+  it("is a GET handler (API-route redirect, not a rendered page)", () => {
+    expect(SOURCE).toContain("export function GET()");
+    expect(SOURCE).not.toContain("export default function");
+  });
+
+  it("responds with a 308 permanent redirect", () => {
+    expect(SOURCE).toContain("status: 308");
+  });
+
+  it("derives the Location from the centralized constant", () => {
+    expect(SOURCE).toContain("LEGACY_DELETION_REDIRECT_TARGET");
+    // The constant is imported from the lineage deletion-content module.
+    expect(SOURCE).toContain("~/routes/lineage/deletion-content");
+  });
+
+  it("no longer ships a page component / DeletionForm", () => {
+    expect(SOURCE).not.toContain("DeletionForm");
+    expect(SOURCE).not.toContain("PageHead");
+  });
+});

src/routes/deletion/life-and-lineage.tsx

@@ -1,31 +1,29 @@
-import { PageHead } from "~/components/PageHead";
-import DeletionForm from "~/components/DeletionForm";
+/**
+ * Legacy Life and Lineage account-deletion route — now a 308 permanent
+ * redirect to the Lineage subdomain (task 11).
+ *
+ * The deletion form has been migrated to `src/routes/lineage/deletion.tsx`
+ * served at `lineage.freno.me/deletion` (vercel.json host rewrites map the
+ * subdomain to the `/lineage/*` internal prefix). Keeping this route as a
+ * permanent (308) server-side redirect — rather than a client `<Navigate>` —
+ * preserves SEO equity and gives installed / linked / support-emailed URLs a
+ * stable resolution path to the new home.
+ *
+ * Implemented as a SolidStart API route (`GET` handler returning a Response)
+ * so the redirect happens before any rendering; the route no longer ships a
+ * page component. The redirect target is centralized in
+ * `~/routes/lineage/deletion-content.ts` (`LEGACY_DELETION_REDIRECT_TARGET`)
+ * so the unit test can assert the destination without importing this server
+ * module.
+ */
+import { LEGACY_DELETION_REDIRECT_TARGET } from "~/routes/lineage/deletion-content";
 
-export default function LifeAndLinageDeletionForm() {
-  return (
-    <>
-      <PageHead
-        title="Account Deletion - Life and Lineage"
-        description="Request account deletion for Life and Lineage. Remove all your data from our system with a 24-hour grace period."
-      />
-      <div class="pt-20">
-        <div class="mx-auto p-4 md:p-6 lg:p-12">
-          <div class="text-text w-full justify-center">
-            <div class="text-xl">
-              <em>What will happen</em>:
-            </div>
-            Once you send, if a match to the email provided is found in our
-            system, a 24hr grace period is started where you can request a
-            cancellation of the account deletion. Once the grace period ends,
-            the account's entry in our central database will be completely
-            removed, and your individual database storing your remote saves will
-            also be deleted. No data related to the account is retained in any
-            way.
-          </div>
-
-          <DeletionForm />
-        </div>
-      </div>
-    </>
-  );
+export function GET() {
+  return new Response(null, {
+    status: 308,
+    headers: {
+      Location: LEGACY_DELETION_REDIRECT_TARGET,
+      "Cache-Control": "public, max-age=0, must-revalidate"
+    }
+  });
 }