Use Personality vernacular in agent page

- When setting up the default agent, configure every conversation that doesn't have an agent to use the Khoj agent
- Fix reverse migration for the locale removal migration

src/khoj/database/adapters/__init__.py

@@ -446,19 +446,21 @@ class AgentAdapters:
             agent.slug = AgentAdapters.DEFAULT_AGENT_SLUG
             agent.name = AgentAdapters.DEFAULT_AGENT_NAME
             agent.save()
-            return agent
+        else:
+            # The default agent is public and managed by the admin. It's handled a little differently than other agents.
+            agent = Agent.objects.create(
+                name=AgentAdapters.DEFAULT_AGENT_NAME,
+                public=True,
+                managed_by_admin=True,
+                chat_model=default_conversation_config,
+                personality=default_personality,
+                tools=["*"],
+                avatar=AgentAdapters.DEFAULT_AGENT_AVATAR,
+                slug=AgentAdapters.DEFAULT_AGENT_SLUG,
+            )
+            Conversation.objects.filter(agent=None).update(agent=agent)
 
-        # The default agent is public and managed by the admin. It's handled a little differently than other agents.
-        return Agent.objects.create(
-            name=AgentAdapters.DEFAULT_AGENT_NAME,
-            public=True,
-            managed_by_admin=True,
-            chat_model=default_conversation_config,
-            personality=default_personality,
-            tools=["*"],
-            avatar=AgentAdapters.DEFAULT_AGENT_AVATAR,
-            slug=AgentAdapters.DEFAULT_AGENT_SLUG,
-        )
+        return agent
 
     @staticmethod
     async def aget_default_agent():

src/khoj/database/migrations/0031_alter_googleuser_locale.py

@@ -3,6 +3,18 @@
 from django.db import migrations, models
 
 
+def set_default_locale(apps, schema_editor):
+    return
+
+
+def reverse_set_default_locale(apps, schema_editor):
+    GoogleUser = apps.get_model("database", "GoogleUser")
+    for user in GoogleUser.objects.all():
+        if not user.locale:
+            user.locale = "en"
+            user.save()
+
+
 class Migration(migrations.Migration):
     dependencies = [
         ("database", "0030_conversation_slug_and_title"),
@@ -14,4 +26,5 @@ class Migration(migrations.Migration):
             name="locale",
             field=models.CharField(blank=True, default=None, max_length=200, null=True),
         ),
+        migrations.RunPython(set_default_locale, reverse_set_default_locale),
     ]

src/khoj/interface/web/agent.html

@@ -24,7 +24,7 @@
                         <img id="agent-avatar" src="{{ agent.avatar }}" alt="Agent Avatar">
                         <input type="text" id="agent-name-input" value="{{ agent.name }}" {% if agent.creator_not_self %} disabled {% endif %}>
                     </div>
-                    <div id="agent-instructions">Instructions</div>
+                    <div id="agent-instructions">Personality</div>
                     <div id="agent-tuning">
                         <p>{{ agent.personality }}</p>
                     </div>