style: Enhance team member photo handling and ensure fallback members are displayed when no team members are available

Website/main.py

@@ -126,8 +126,16 @@ def _save_team_photo(file_obj, identifier: str) -> str | None:
     if not _is_allowed_image_filename(original_name):
         return None
     os.makedirs(TEAM_UPLOAD_DIR, exist_ok=True)
-    extension = os.path.splitext(original_name)[1].lower() or ".jpg"
+    # If a photo for this identifier already exists, keep the first one and return it.
     safe_identifier = secure_filename(identifier or "member")
+    try:
+        for existing in sorted(os.listdir(TEAM_UPLOAD_DIR)):
+            if existing.startswith(f"team_{safe_identifier}_"):
+                return f"uploads/team/{existing}"
+    except Exception:
+        # If listing fails for any reason, proceed to save new file.
+        pass
+    extension = os.path.splitext(original_name)[1].lower() or ".jpg"
     unique_name = f"team_{safe_identifier}_{datetime.utcnow().strftime('%Y%m%d%H%M%S')}{extension}"
     target = os.path.join(TEAM_UPLOAD_DIR, unique_name)
     file_obj.save(target)

Website/templates/team.html

@@ -9,7 +9,8 @@
 </section>
 
 <section class="team-grid" aria-label="Team Cards">
-    {% for member in team_members %}
+    {% if team_members and team_members|length > 0 %}
+        {% for member in team_members %}
         <article class="member-card">
             {% if member and member.photo %}
                 <img class="member-photo" src="{{ url_for('static', filename=member.photo) }}" alt="Teamfoto {{ member.name }}">
@@ -25,7 +26,11 @@
                 {% endif %}
             </div>
         </article>
-    {% endfor %}
+</section>
+
+{% if not team_members or team_members|length == 0 %}
+    <p>Derzeit sind keine Teammitglieder eingetragen. Bitte füge im Adminbereich Team-Einträge in der Datenbank hinzu.</p>
+{% endif %}
 </section>
 
 <section class="values">