feat: adds Sync statistics.

app.py

@@ -195,12 +195,37 @@ def require_password_reset():
     return render_template("require_password_reset.html")
 
 
-@app.route("/reset-password-submit", methods=["POST"])
+@app.route("/sync-stats")
 @login_required
-def reset_password_submit():
-    """Handle password reset form submission"""
-    uid = session.get("uid")
-    profile = get_user_profile(uid)
+def sync_stats():
+    """Display sync statistics as a stacked bar chart"""
+    from datetime import datetime, timedelta
+    import pytz
+
+    profile = get_user_profile(session['uid'])
+    if not profile.get("is_admin"):
+        abort(403, "Access denied. Admin privileges required.")
+
+    pacific = pytz.timezone('America/Los_Angeles')
+    today = datetime.now(pacific)
+    dates = [(today - timedelta(days=i)).strftime('%Y-%m-%d') for i in range(13, -1, -1)]
+
+    stats = []
+    for date in dates:
+        doc_id = f"sync_{date}"
+        doc = db.collection("sync_stats").document(doc_id).get()
+        if doc.exists:
+            d = doc.to_dict()
+            stats.append({
+                "date": date,
+                "recent_successes": d.get("recent_successes", 0),
+                "oldest_successes": d.get("oldest_successes", 0),
+                "failures": d.get("failures", 0)
+            })
+        else:
+            stats.append({"date": date, "recent_successes": 0, "oldest_successes": 0, "failures": 0})
+
+    return render_template("sync_stats.html", stats=stats)
 
     new_password = request.form.get("new_password")
     confirm_password = request.form.get("confirm_password")