Update some edge cases and usability of create agent flow

- Use the slug to determine which agent to PATCH
- Make the agent creation form multi-step to streamline the process

src/khoj/database/adapters/__init__.py

@@ -696,10 +696,12 @@ class AgentAdapters:
         files: List[str],
         input_tools: List[str],
         output_modes: List[str],
+        slug: Optional[str] = None,
     ):
         chat_model_option = await ChatModelOptions.objects.filter(chat_model=chat_model).afirst()
 
-        agent, created = await Agent.objects.filter(name=name, creator=user).aupdate_or_create(
+        # Slug will be None for new agents, which will trigger a new agent creation with a generated, immutable slug
+        agent, created = await Agent.objects.filter(slug=slug, creator=user).aupdate_or_create(
             defaults={
                 "name": name,
                 "creator": user,

src/khoj/routers/api_agents.py

@@ -35,6 +35,7 @@ class ModifyAgentBody(BaseModel):
     files: Optional[List[str]] = []
     input_tools: Optional[List[str]] = []
     output_modes: Optional[List[str]] = []
+    slug: Optional[str] = None
 
 
 @api_agents.get("", response_class=Response)
@@ -192,6 +193,7 @@ async def create_agent(
         body.files,
         body.input_tools,
         body.output_modes,
+        body.slug,
     )
 
     agents_packet = {
@@ -233,7 +235,7 @@ async def update_agent(
             status_code=400,
         )
 
-    selected_agent = await AgentAdapters.aget_agent_by_name(body.name, user)
+    selected_agent = await AgentAdapters.aget_agent_by_slug(body.slug, user)
 
     if not selected_agent:
         return Response(
@@ -253,6 +255,7 @@ async def update_agent(
         body.files,
         body.input_tools,
         body.output_modes,
+        body.slug,
     )
 
     agents_packet = {

src/khoj/routers/api_chat.py

@@ -209,7 +209,7 @@ def chat_history(
 
     agent_metadata = None
     if conversation.agent:
-        if conversation.agent.privacy_level == Agent.PrivacyLevel.PRIVATE:
+        if conversation.agent.privacy_level == Agent.PrivacyLevel.PRIVATE and conversation.agent.creator != user:
             conversation.agent = None
         else:
             agent_metadata = {