Style the Admin Panel with a modern theme and Khoj branding (#999)

Overview
- The default django admin panel UI looks pretty dated and didn't
  have any Khoj specific branding
- Used the Unfold Django admin panel theme for a modern look
- Used the Khoj logo and name in Admin panel title, headings, favicons

Details:
All models shown on Admin panel need to inherit from unfold's
ModelAdmin to get styling applied. So

- Make all models on Admin panel inherit from unfold's ModelAdmin
- Subclassed UserAdmin to inherit from unfold's ModelAdmin
- Deregistered the unused Auth Group model from the Admin panel
  We can add it back when its actually used. Avoid confusion for now
- Explicitly register DjangoJobExecution on admin panel and again make
  it inherit from the unfold.admin.ModelAdmin

pyproject.toml

@@ -64,6 +64,7 @@ dependencies = [
     "anyio == 3.7.1",
     "pymupdf == 1.24.11",
     "django == 5.0.9",
+    "django-unfold == 0.42.0",
     "authlib == 1.2.1",
     "llama-cpp-python == 0.2.88",
     "itsdangerous == 2.1.2",

src/khoj/app/settings.py

@@ -13,6 +13,8 @@ https://docs.djangoproject.com/en/4.2/ref/settings/
 import os
 from pathlib import Path
 
+from django.templatetags.static import static
+
 from khoj.utils.helpers import in_debug_mode, is_env_var_true
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
@@ -72,6 +74,7 @@ INSTALLED_APPS = [
     "django.contrib.auth",
     "django.contrib.contenttypes",
     "khoj.database.apps.DatabaseConfig",
+    "unfold",
     "django.contrib.admin",
     "django.contrib.sessions",
     "django.contrib.messages",
@@ -195,3 +198,21 @@ APSCHEDULER_DATETIME_FORMAT = "N j, Y, f:s a"
 # that supports multiple background worker processes instead (e.g. Dramatiq, Celery, Django-RQ,
 # etc. See: https://djangopackages.org/grids/g/workers-queues-tasks/ for popular options).
 APSCHEDULER_RUN_NOW_TIMEOUT = 240  # Seconds
+
+UNFOLD = {
+    "SITE_TITLE": "Khoj Admin Panel",
+    "SITE_HEADER": "Khoj Admin Panel",
+    "SITE_URL": "/",
+    "SITE_ICON": {
+        "light": lambda request: static("assets/icons/khoj_lantern_128x128.png"),
+        "dark": lambda request: static("assets/icons/khoj_lantern_128x128_dark.png"),
+    },
+    "SITE_FAVICONS": [
+        {
+            "rel": "icon",
+            "sizes": "32x32",
+            "type": "image/svg+xml",
+            "href": lambda request: static("assets/icons/khoj_lantern.svg"),
+        },
+    ],
+}

src/khoj/database/admin.py

@@ -4,11 +4,14 @@ from datetime import date, datetime, timedelta, timezone
 
 from apscheduler.job import Job
 from django.contrib import admin, messages
-from django.contrib.auth.admin import UserAdmin
+from django.contrib.auth.admin import GroupAdmin as BaseGroupAdmin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from django.contrib.auth.models import Group
 from django.http import HttpResponse
-from django_apscheduler.admin import DjangoJobAdmin
+from django_apscheduler.admin import DjangoJobAdmin, DjangoJobExecutionAdmin
 from django_apscheduler.jobstores import DjangoJobStore
-from django_apscheduler.models import DjangoJob
+from django_apscheduler.models import DjangoJob, DjangoJobExecution
+from unfold import admin as unfold_admin
 
 from khoj.database.models import (
     Agent,
@@ -35,10 +38,8 @@ from khoj.database.models import (
 )
 from khoj.utils.helpers import ImageIntentType
 
-admin.site.unregister(DjangoJob)
 
-
-class KhojDjangoJobAdmin(DjangoJobAdmin):
+class KhojDjangoJobAdmin(DjangoJobAdmin, unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "next_run_time",
@@ -62,10 +63,25 @@ class KhojDjangoJobAdmin(DjangoJobAdmin):
         return queryset, use_distinct
 
 
+class KhojDjangoJobExecutionAdmin(DjangoJobExecutionAdmin, unfold_admin.ModelAdmin):
+    pass
+
+
+admin.site.unregister(DjangoJob)
 admin.site.register(DjangoJob, KhojDjangoJobAdmin)
+admin.site.unregister(DjangoJobExecution)
+admin.site.register(DjangoJobExecution, KhojDjangoJobExecutionAdmin)
 
 
-class KhojUserAdmin(UserAdmin):
+class GroupAdmin(BaseGroupAdmin, unfold_admin.ModelAdmin):
+    pass
+
+
+class UserAdmin(BaseUserAdmin, unfold_admin.ModelAdmin):
+    pass
+
+
+class KhojUserAdmin(UserAdmin, unfold_admin.ModelAdmin):
     class DateJoinedAfterFilter(admin.SimpleListFilter):
         title = "Joined after"
         parameter_name = "joined_after"
@@ -137,21 +153,22 @@ class KhojUserAdmin(UserAdmin):
     get_email_login_url.short_description = "Get email login URL"  # type: ignore
 
 
+admin.site.unregister(Group)
 admin.site.register(KhojUser, KhojUserAdmin)
 
-admin.site.register(ProcessLock)
-admin.site.register(SpeechToTextModelOptions)
-admin.site.register(ReflectiveQuestion)
-admin.site.register(ClientApplication)
-admin.site.register(GithubConfig)
-admin.site.register(NotionConfig)
-admin.site.register(UserVoiceModelConfig)
-admin.site.register(VoiceModelOption)
-admin.site.register(UserRequests)
+admin.site.register(ProcessLock, unfold_admin.ModelAdmin)
+admin.site.register(SpeechToTextModelOptions, unfold_admin.ModelAdmin)
+admin.site.register(ReflectiveQuestion, unfold_admin.ModelAdmin)
+admin.site.register(ClientApplication, unfold_admin.ModelAdmin)
+admin.site.register(GithubConfig, unfold_admin.ModelAdmin)
+admin.site.register(NotionConfig, unfold_admin.ModelAdmin)
+admin.site.register(UserVoiceModelConfig, unfold_admin.ModelAdmin)
+admin.site.register(VoiceModelOption, unfold_admin.ModelAdmin)
+admin.site.register(UserRequests, unfold_admin.ModelAdmin)
 
 
 @admin.register(Agent)
-class AgentAdmin(admin.ModelAdmin):
+class AgentAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "name",
@@ -161,7 +178,7 @@ class AgentAdmin(admin.ModelAdmin):
 
 
 @admin.register(Entry)
-class EntryAdmin(admin.ModelAdmin):
+class EntryAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "created_at",
@@ -183,7 +200,7 @@ class EntryAdmin(admin.ModelAdmin):
 
 
 @admin.register(Subscription)
-class KhojUserSubscription(admin.ModelAdmin):
+class KhojUserSubscription(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "user",
@@ -195,7 +212,7 @@ class KhojUserSubscription(admin.ModelAdmin):
 
 
 @admin.register(ChatModelOptions)
-class ChatModelOptionsAdmin(admin.ModelAdmin):
+class ChatModelOptionsAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "chat_model",
@@ -206,7 +223,7 @@ class ChatModelOptionsAdmin(admin.ModelAdmin):
 
 
 @admin.register(TextToImageModelConfig)
-class TextToImageModelOptionsAdmin(admin.ModelAdmin):
+class TextToImageModelOptionsAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "model_name",
@@ -216,7 +233,7 @@ class TextToImageModelOptionsAdmin(admin.ModelAdmin):
 
 
 @admin.register(OpenAIProcessorConversationConfig)
-class OpenAIProcessorConversationConfigAdmin(admin.ModelAdmin):
+class OpenAIProcessorConversationConfigAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "name",
@@ -227,7 +244,7 @@ class OpenAIProcessorConversationConfigAdmin(admin.ModelAdmin):
 
 
 @admin.register(SearchModelConfig)
-class SearchModelConfigAdmin(admin.ModelAdmin):
+class SearchModelConfigAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "name",
@@ -238,7 +255,7 @@ class SearchModelConfigAdmin(admin.ModelAdmin):
 
 
 @admin.register(ServerChatSettings)
-class ServerChatSettingsAdmin(admin.ModelAdmin):
+class ServerChatSettingsAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "chat_default",
         "chat_advanced",
@@ -247,7 +264,7 @@ class ServerChatSettingsAdmin(admin.ModelAdmin):
 
 
 @admin.register(WebScraper)
-class WebScraperAdmin(admin.ModelAdmin):
+class WebScraperAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "priority",
         "name",
@@ -261,7 +278,7 @@ class WebScraperAdmin(admin.ModelAdmin):
 
 
 @admin.register(Conversation)
-class ConversationAdmin(admin.ModelAdmin):
+class ConversationAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "user",
@@ -367,7 +384,7 @@ class ConversationAdmin(admin.ModelAdmin):
 
 
 @admin.register(UserConversationConfig)
-class UserConversationConfigAdmin(admin.ModelAdmin):
+class UserConversationConfigAdmin(unfold_admin.ModelAdmin):
     list_display = (
         "id",
         "get_user_email",