tuning ui and adding adaptive themeing to extension

backend/app/models/source.py

@@ -6,7 +6,7 @@ from sqlalchemy import String, Boolean, Integer, Text, ForeignKey, UniqueConstra
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
-from app.models.base import Base, TimestampMixin
+from app.models.base import Base, TimestampMixin, format_datetime
 
 
 class Source(Base, TimestampMixin):
@@ -55,12 +55,12 @@ class Source(Base, TimestampMixin):
             "url": self.url,
             "enabled": self.enabled,
             "check_interval": self.check_interval,
-            "last_check": self.last_check.isoformat() if self.last_check else None,
-            "last_success": self.last_success.isoformat() if self.last_success else None,
+            "last_check": format_datetime(self.last_check),
+            "last_success": format_datetime(self.last_success),
             "error_count": self.error_count,
             "metadata": self.metadata_,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "created_at": format_datetime(self.created_at),
+            "updated_at": format_datetime(self.updated_at),
         }
         if include_subscription and self.subscription:
             result["subscription_name"] = self.subscription.name