Change readings table to list of cards, also update edit reading page to include link to delete reading

app/routes.py

@@ -2,6 +2,7 @@ import csv
 from io import StringIO
 import io
 from flask import Blueprint, Response, make_response, render_template, redirect, request, send_file, url_for, flash
+import humanize
 from sqlalchemy import func
 from werkzeug.security import generate_password_hash, check_password_hash
 from werkzeug.http import http_date
@@ -104,6 +105,12 @@ def dashboard():
     # Fetch and order readings
     readings = readings_query.order_by(Reading.timestamp.desc()).all()
 
+    # Add human-readable relative timestamps to readings
+    now = datetime.utcnow()
+    for reading in readings:
+        reading.relative_timestamp = humanize.naturaltime(now - reading.timestamp)
+
+
     # Weekly summary (last 7 days)
     one_week_ago = datetime.now() - timedelta(days=7)
     weekly_readings = [r for r in readings if r.timestamp >= one_week_ago]