Website: 16-bit pixel-art rebuild with a live Three.js office, downloads from Gitea v1.5.1

- Title screen over a real-time voxel office rendered at low resolution and quantized to a rotating 32-colour palette with Bayer dithering; day part and season re-light the scene and every surface.
- 16-bit UI kit: name-plate dialogs, menu cursor, inventory, XP bar, badges, NPC speech, GAME OVER with CONTINUE, hand-placed 12x12 icons, Fusion Pixel font (Latin subset preloaded).
- Sections as a game: quest log (onboarding), character select (AI CEO / AI Co-Founder), inventory (features), party roster (providers), live download XP, save point (all v1.5.1 builds), FAQ as NPC dialog, credits.
- Downloads and source point to the Gitea release; the download function only redirects to git.zacharyzhang.com.
- Tailwind and the old components removed; unit tests for platform/downloads, rewritten e2e suite.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

landing/tests/unit/platform.test.ts

@@ -0,0 +1,44 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { detectPlatform, recommendedAsset } from "../../lib/platform";
+
+const UA = {
+  mac: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0 Safari/537.36",
+  windows: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0 Safari/537.36",
+  linux: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0 Safari/537.36",
+  linuxArm: "Mozilla/5.0 (X11; Linux aarch64; rv:131.0) Gecko/20100101 Firefox/131.0",
+  android: "Mozilla/5.0 (Linux; Android 15; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0 Mobile Safari/537.36",
+  iphone: "Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1",
+};
+
+test("detects desktop operating systems and architectures from the user agent", () => {
+  assert.deepEqual(detectPlatform(UA.windows), { os: "windows", arch: "x64" });
+  assert.deepEqual(detectPlatform(UA.linux), { os: "linux", arch: "x64" });
+  assert.deepEqual(detectPlatform(UA.linuxArm), { os: "linux", arch: "arm64" });
+});
+
+test("treats the Mac user agent's Intel claim as unknown and trusts client hints", () => {
+  assert.deepEqual(detectPlatform(UA.mac), { os: "macos", arch: "unknown" });
+  assert.deepEqual(detectPlatform(UA.mac, { platform: "macOS", architecture: "arm" }), { os: "macos", arch: "arm64" });
+  assert.deepEqual(detectPlatform(UA.mac, { platform: "macOS", architecture: "x86" }), { os: "macos", arch: "x64" });
+});
+
+test("reports phones as unknown even though their user agents mention Linux or Mac OS X", () => {
+  assert.equal(detectPlatform(UA.android).os, "unknown");
+  assert.equal(detectPlatform(UA.iphone).os, "unknown");
+});
+
+test("recommends the matching installer for each platform", () => {
+  assert.equal(recommendedAsset({ os: "macos", arch: "arm64" })?.id, "macos-arm64-dmg");
+  assert.equal(recommendedAsset({ os: "macos", arch: "unknown" }), null);
+  assert.equal(recommendedAsset({ os: "macos", arch: "x64" })?.id, "macos-x64-dmg");
+  assert.equal(recommendedAsset({ os: "windows", arch: "x64" })?.id, "windows-x64-installer");
+  assert.equal(recommendedAsset({ os: "windows", arch: "arm64" })?.id, "windows-x64-installer");
+  assert.equal(recommendedAsset({ os: "linux", arch: "x64" })?.id, "linux-x64-appimage");
+  assert.equal(recommendedAsset({ os: "linux", arch: "unknown" })?.id, "linux-x64-appimage");
+});
+
+test("recommends nothing where no build exists", () => {
+  assert.equal(recommendedAsset({ os: "linux", arch: "arm64" }), null);
+  assert.equal(recommendedAsset({ os: "unknown", arch: "x64" }), null);
+});