fix: clicking DM entries actually navigates to conversation

ConversationList was only setting activeConversationId in the store
but never navigating. If the Outlet was still showing ChatArea from
a server channel route, DMChat never mounted. Now every click
navigates to /dm/:conversationId so the router mounts DMChat.

web/src/components/ConversationList.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useState } from "react";
+import { useNavigate } from "react-router-dom";
 import { useConversationStore } from "../stores/conversation.ts";
 import { useAuthStore } from "../stores/auth.ts";
 import { NewConversationModal } from "./NewConversationModal.tsx";
@@ -16,30 +17,36 @@ export function ConversationList() {
   const conversations = useConversationStore((s) => s.conversations);
   const activeId = useConversationStore((s) => s.activeConversationId);
   const fetchConversations = useConversationStore((s) => s.fetchConversations);
-  const setActive = useConversationStore((s) => s.setActiveConversation);
   const createConversation = useConversationStore((s) => s.createConversation);
   const currentUser = useAuthStore((s) => s.user);
+  const navigate = useNavigate();
   const [showNew, setShowNew] = useState(false);
+  const [notesError, setNotesError] = useState<string | null>(null);
 
   useEffect(() => {
     fetchConversations();
   }, [fetchConversations]);
 
-  const [notesError, setNotesError] = useState<string | null>(null);
+  const openConversation = (convId: string) => {
+    navigate(`/dm/${convId}`);
+  };
 
   const openNotes = async () => {
     setNotesError(null);
     // Find existing self-DM or create one
     const existing = conversations.find((c) => isSelfDM(c, currentUser?.id || ""));
     if (existing) {
-      setActive(existing.id);
+      navigate(`/dm/${existing.id}`);
       return;
     }
     try {
-      await createConversation([]);
+      const conv = await createConversation([]);
+      if (conv) {
+        navigate(`/dm/${conv.id}`);
+      }
     } catch (err) {
-      console.error('Failed to create notes:', err);
-      setNotesError(err instanceof Error ? err.message : 'Failed to create notes');
+      console.error("Failed to create notes:", err);
+      setNotesError(err instanceof Error ? err.message : "Failed to create notes");
     }
   };
 
@@ -78,7 +85,7 @@ export function ConversationList() {
           return (
             <button
               key={conv.id}
-              onClick={() => setActive(conv.id)}
+              onClick={() => openConversation(conv.id)}
               className={`w-full text-left px-2 py-1 rounded-sm flex items-center gap-2 ${
                 conv.id === activeId
                   ? "terminal-active"