Add needs-attention alerts, last charged, health %, quick charge, sortable columns

app.py

@@ -76,17 +76,38 @@ def create_app(config_object="config"):
         ]
         devices = db.query(Device).order_by(Device.name).all()
         devices_with_slots = [d for d in devices if d.installed_count() < d.battery_slots]
-        one_year_ago = (date.today() - timedelta(days=365)).isoformat()
+        today = date.today()
+        one_year_ago = (today - timedelta(days=365)).isoformat()
         total_charges = db.query(func.count(ChargeLog.id)).scalar() or 0
         charges_last_year = (db.query(func.count(ChargeLog.id))
                              .filter(ChargeLog.charged_date >= one_year_ago)
                              .scalar()) or 0
+        last_charged_map = {
+            r[0]: r[1]
+            for r in db.query(ChargeLog.battery_id, func.max(ChargeLog.charged_date))
+            .group_by(ChargeLog.battery_id).all()
+        }
+        active = [b for b in batteries if b.status in ("available", "installed")]
+        needs_attention = {
+            "low_capacity": [
+                b for b in active
+                if b.tested_capacity_mah and b.capacity_mah
+                and b.tested_capacity_mah < 0.8 * b.capacity_mah
+            ],
+            "low_pct": [
+                b for b in batteries
+                if b.battery_percentage is not None and b.battery_percentage < 20
+            ] if ha_client.enabled else [],
+        }
         return render_template("dashboard.html", batteries=batteries,
                                storage_locations=storage_locations, devices=devices,
                                devices_with_slots=devices_with_slots,
                                ha_enabled=ha_client.enabled,
                                total_charges=total_charges,
-                               charges_last_year=charges_last_year)
+                               charges_last_year=charges_last_year,
+                               last_charged_map=last_charged_map,
+                               needs_attention=needs_attention,
+                               today=today)
 
     # ------------------------------------------------------------------ #
     # Battery — add