feat: add a platform-aware apps download page

Serve desktop and Android builds from the latest Gitea release on /download, and fix the desktop compile and CI flakes that blocked v1.3.0.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/pages/auth.module.css

@@ -165,7 +165,7 @@
   color: var(--text2);
 }
 
-/* Страница Android-приложения (/android). */
+/* Страница приложений (/download). */
 .download {
   display: flex;
   align-items: center;
@@ -238,6 +238,40 @@
   font-family: var(--font-mono);
 }
 
+.otherClients {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.otherTitle {
+  margin: 8px 0 0;
+  color: var(--text3);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.downloadAlt {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 10px 14px;
+  border-radius: var(--radius-lg);
+  border: 1px solid var(--line2);
+  background: var(--surface2);
+  color: var(--text);
+  font-size: 14px;
+  font-weight: 600;
+  text-decoration: none;
+}
+
+.downloadAlt span {
+  color: var(--text3);
+  font-size: 12px;
+  font-weight: 500;
+}
+
 .link {
   align-self: center;
 }