Sort conversations by last activity

Bump Conversation.updated_at on every message (not just the first) so
actively-used conversations rise to the top of the list endpoint's
existing -updated_at sort. Refresh the sidebar after every send so the
just-used conversation reorders live.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

blueprints/conversation/logic.py

@@ -1,3 +1,5 @@
+from datetime import datetime, timezone
+
 import tortoise.exceptions
 
 import blueprints.users.models
@@ -19,10 +21,17 @@ async def add_message_to_conversation(
 ) -> ConversationMessage:
     print(conversation, message, speaker)
 
+    # Bump updated_at on every message so conversations sort by last activity.
+    # `update_fields` bypasses the auto_now recompute, so set it explicitly.
+    update_fields = ["updated_at"]
+    conversation.updated_at = datetime.now(timezone.utc)
+
     # Name the conversation after the first user message
     if speaker == "user" and not await conversation.messages.all().exists():
         conversation.name = message[:100]
-        await conversation.save()
+        update_fields.append("name")
+
+    await conversation.save(update_fields=update_fields)
 
     message = await ConversationMessage.create(
         text=message,

raggr-frontend/src/hooks/useChat.ts

@@ -131,7 +131,6 @@ export function useChat({
       if ((!query.trim() && !pendingImage) || isLoading) return;
 
       let activeId = conversationId;
-      const createdNew = !activeId;
       if (!activeId) {
         const created = await createConversation();
         // Prevent the route-change loader from clearing what we're about to add.
@@ -259,9 +258,10 @@ export function useChat({
         if (isMountedRef.current) {
           setIsLoading(false);
           setStreaming(false);
-          if (createdNew) {
-            refreshConversations();
-          }
+          // Refresh after every send so the just-used conversation floats to
+          // the top of the sidebar (sorted by last activity) and picks up the
+          // auto-generated title on the first message.
+          refreshConversations();
         }
         streamingActiveRef.current = false;
         abortControllerRef.current = null;