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/lineage/downloads-content.test.ts

@@ -0,0 +1,92 @@
+/**
+ * Unit tests for the Lineage per-subdomain downloads page content (task 11).
+ *
+ * Mirrors the `landing-content.test.ts` pattern: assert against pure
+ * constants exported from `downloads-content.ts` (no solid-js / router /
+ * DOM). This covers the task-11 acceptance matrix that's structurally
+ * verifiable without rendering:
+ *  - APK asset key is `"lineage"` (the tRPC key the downloads router maps to
+ *    `Life and Lineage.apk`) — must match the unified downloads page's key
+ *    so the APK is byte-identical from both origins.
+ *  - App Store link is the canonical Life and Lineage App Store URL.
+ *  - PageHead base title + description (suffix appended by PageHead).
+ *  - Back-to-home link is the subdomain-relative public browser path.
+ */
+import { describe, it, expect } from "bun:test";
+import {
+  LINEAGE_DOWNLOAD_ASSET,
+  LINEAGE_APK_BUTTON_LABEL,
+  LINEAGE_APP_STORE_URL,
+  LINEAGE_HOME_HREF,
+  PAGE_META
+} from "~/routes/lineage/downloads-content";
+import { APP_STORE_URL as LANDING_APP_STORE_URL } from "~/routes/lineage/landing-content";
+
+describe("Lineage downloads — APK asset", () => {
+  it("uses the tRPC key the downloads router maps to the lineage APK", () => {
+    // src/server/api/routers/downloads.ts: assets["lineage"] = "Life and Lineage.apk"
+    expect(LINEAGE_DOWNLOAD_ASSET).toBe("lineage");
+  });
+
+  it("matches the asset key used by the unified freno.me/downloads page", () => {
+    // Regression guard: the unified page calls download("lineage") for the
+    // same S3 object — both origins must serve the identical APK.
+    expect(LINEAGE_DOWNLOAD_ASSET).toBe("lineage");
+  });
+});
+
+describe("Lineage downloads — button label", () => {
+  it("surfaces the APK file extension in the CTA", () => {
+    expect(LINEAGE_APK_BUTTON_LABEL).toBe("download.apk");
+  });
+});
+
+describe("Lineage downloads — App Store link", () => {
+  it("matches the canonical Life and Lineage App Store URL", () => {
+    expect(LINEAGE_APP_STORE_URL).toBe(
+      "https://apps.apple.com/us/app/life-and-lineage/id6737252442"
+    );
+  });
+
+  it("is an absolute https URL", () => {
+    expect(LINEAGE_APP_STORE_URL.startsWith("https://")).toBe(true);
+  });
+
+  it("matches the App Store URL surfaced on the landing page", () => {
+    // landing-content.ts exports APP_STORE_URL — same canonical link.
+    expect(LINEAGE_APP_STORE_URL).toBe(LANDING_APP_STORE_URL);
+  });
+});
+
+describe("Lineage downloads — back-to-home link", () => {
+  it("targets the subdomain-relative public browser path", () => {
+    // NOT `/lineage/` (the internal vercel-rewrite prefix) — vercel rewrites
+    // `lineage.freno.me/` → `/lineage/` while leaving the browser URL clean.
+    expect(LINEAGE_HOME_HREF).toBe("/");
+  });
+
+  it("does not leak the internal route prefix", () => {
+    expect(LINEAGE_HOME_HREF).not.toContain("/lineage");
+  });
+});
+
+describe("Lineage downloads — PageHead inputs", () => {
+  it("passes the base title (suffix is appended by PageHead)", () => {
+    expect(PAGE_META.title).toBe("Downloads");
+  });
+
+  it("does not pre-bake the site suffix into the title", () => {
+    expect(PAGE_META.title).not.toContain("|");
+  });
+
+  it("carries a non-empty description", () => {
+    expect(PAGE_META.description.length).toBeGreaterThan(0);
+  });
+
+  it("description mentions the product + both store fronts", () => {
+    const desc = PAGE_META.description.toLowerCase();
+    expect(desc).toContain("life and lineage");
+    expect(desc).toContain("apk");
+    expect(desc).toContain("app store");
+  });
+});