appview: did resolution exclusion list

appview/pages/templates/timeline.html

···
   </div>
   <div class="italic text-lg">
     tightly-knit social coding, <a href="/login" class="underline inline-flex gap-1 items-center">join now {{ i "arrow-right" "w-4 h-4" }}</a>
-    <p class="pt-5 px-10 text-sm text-gray-500 dark:text-gray-400">Join our IRC channel: <a href="https://web.libera.chat/#tangled"><code>#tangled</code> on Libera Chat</a>.
+    <p class="pt-5 px-10 text-sm text-gray-500 dark:text-gray-400">Join our <a href="https://chat.tangled.sh">Discord</a>or IRC channel: <a href="https://web.libera.chat/#tangled"><code>#tangled</code> on Libera Chat</a>.
     Read an introduction to Tangled <a href="https://blog.tangled.sh/intro">here</a>.</p>
   </div>
 </div>

appview/pages/templates/user/login.html

···
                     </button>
                 </form>
                 <p class="text-sm text-gray-500">
-                    Join our IRC channel:
+                    Join our <a href="https://chat.tangled.sh">Discord</a> or IRC channel:
                     <a href="https://web.libera.chat/#tangled"
                         ><code>#tangled</code> on Libera Chat</a
                     >.

appview/state/middleware.go

···
 	"strings"
 	"time"
 
+	"slices"
+
 	comatproto "github.com/bluesky-social/indigo/api/atproto"
 	"github.com/bluesky-social/indigo/atproto/identity"
 	"github.com/bluesky-social/indigo/xrpc"
···
 }
 
 func ResolveIdent(s *State) Middleware {
+	excluded := []string{"favicon.ico"}
+
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 			didOrHandle := chi.URLParam(req, "user")
+			if slices.Contains(excluded, didOrHandle) {
+				next.ServeHTTP(w, req)
+				return
+			}
 
 			id, err := s.resolver.ResolveIdent(req.Context(), didOrHandle)
 			if err != nil {