fix: make favicon load consistently across all pages

app.py

@@ -7,7 +7,7 @@ from functools import wraps
 from pathlib import Path
 from urllib import parse, request as urllib_request
 
-from flask import Flask, redirect, render_template, request, session, url_for
+from flask import Flask, redirect, render_template, request, send_from_directory, session, url_for
 from werkzeug.security import check_password_hash
 
 
@@ -250,6 +250,15 @@ def health():
         return {"status": "error"}, 503
 
 
+@app.route("/favicon.ico")
+def favicon():
+    return send_from_directory(
+        app.static_folder,
+        "img/favicon.png",
+        mimetype="image/png",
+    )
+
+
 if __name__ == "__main__":
     init_db()
     app.run(debug=True)