fix(themes): show author avatars on installed theme cards

Installed theme cards rendered only an initial because their manifests store the author name, not an avatar URL. Use the EZPPFarm avatar endpoint with the author name and keep the initial as the image-load fallback, matching the community workshop presentation.

src/screens/Launch.svelte

@@ -4069,11 +4069,22 @@
                                 class="absolute right-2 bottom-2 left-2 flex items-center justify-between gap-2"
                               >
                                 <div class="flex min-w-0 items-center gap-1.5">
-                                  <span
+                                  <Avatar.Root
-                                    class="flex size-5 shrink-0 items-center justify-center rounded-full border border-white/20 bg-theme-800 text-[9px] font-bold text-white/80 uppercase"
+                                    class="size-5 shrink-0 border border-white/20 bg-theme-800"
                                   >
-                                    {theme.author.trim().charAt(0) || '?'}
+                                    <Avatar.Image
-                                  </span>
+                                      src={theme.author.trim()
+                                        ? `https://a.ez-pp.farm/${encodeURIComponent(theme.author.trim())}`
+                                        : undefined}
+                                      alt={theme.author || 'Unknown author'}
+                                      class="object-cover"
+                                    />
+                                    <Avatar.Fallback
+                                      class="text-[9px] font-bold text-white/80 uppercase"
+                                    >
+                                      {theme.author.trim().charAt(0) || '?'}
+                                    </Avatar.Fallback>
+                                  </Avatar.Root>
                                   <span
                                     class="truncate text-[11px] font-semibold text-white/95 drop-shadow-sm"
                                   >