feat(home): redesign homepage with editorial and launchpad layouts

Replace the minimal centered layout with a full literary/academic
homepage: logged-out users see an editorial hero, manifesto, demo
notes, and ZK primer; logged-in users see a personal launchpad
(greeting, repo tiles, last visited, review queue) followed by the
same editorial content below.

Uses DaisyUI CSS variables throughout (color-mix) so it adapts to
any theme change without hardcoded overrides.

src/App.vue

@@ -19,6 +19,7 @@ const { isATProtoReady } = useATProtoLogin()
 #main-app {
   height: 100dvh;
   width: 100%;
+  max-width: none;
   display: flex;
   flex: 1;
 }