Here's a summary of all fixes:

Issue #4 — Skip not clearing med
  File: synculous-client/src/app/dashboard/medications/page.tsx                                           Root cause: Skipped medications were routed to the "Upcoming" section (status === 'skipped' in the
  upcoming condition), so they appeared as if still pending.
  Fix: Removed || status === 'skipped' from the grouping condition. Now skipped meds go to the "Due"
  section where they properly render with the "Skipped" label — same pattern as taken meds showing
  "Taken".

  Issue #5 — "Invested -359m in yourself"

  Files: api/routes/routines.py, synculous-client/src/app/dashboard/page.tsx,
  synculous-client/src/app/dashboard/stats/page.tsx
  Root cause: Session duration was calculated by comparing a naive UTC created_at from PostgreSQL with
  the user's local time (after stripping timezone). For users behind UTC (e.g., CST/UTC-6), this
  produced negative durations (~-359 minutes ≈ -6 hours offset).
  Fix: Added _make_aware_utc() helper that treats naive datetimes as UTC before comparison. Also clamped
   durations to max(0, ...) on both backend and frontend formatTime as a safety net.

  Issue #6 — Push notifications not working

  File: api/routes/notifications.py
  Root cause: Subscribing to push notifications created a push_subscriptions row but never set
  web_push_enabled: true in the notifications table. The scheduler daemon checks web_push_enabled before
   sending, so push notifications were always skipped.
  Fix: When subscribing, also call notifications.setNotificationSettings() to enable web_push_enabled.
  When unsubscribing (and no subscriptions remain), disable it.

api/routes/notifications.py

@@ -9,6 +9,7 @@ import flask
 import jwt
 import core.auth as auth
 import core.postgres as postgres
+import core.notifications as notifications
 
 
 def _get_user_uuid(token):
@@ -75,6 +76,8 @@ def register(app):
             "auth": auth_key,
         }
         postgres.insert("push_subscriptions", row)
+        # Ensure web_push_enabled is set in notifications settings
+        notifications.setNotificationSettings(user_uuid, {"web_push_enabled": True})
         return flask.jsonify({"subscribed": True}), 201
 
     @app.route("/api/notifications/subscribe", methods=["DELETE"])
@@ -91,4 +94,8 @@ def register(app):
             "user_uuid": user_uuid,
             "endpoint": data["endpoint"],
         })
+        # If no subscriptions remain, disable web push
+        remaining = postgres.select("push_subscriptions", where={"user_uuid": user_uuid})
+        if not remaining:
+            notifications.setNotificationSettings(user_uuid, {"web_push_enabled": False})
         return flask.jsonify({"unsubscribed": True}), 200