Add new templates for Dienstleistungen, Kontakt, Projekte, and Team pages

- Created 'dienstleistungen.html' to showcase services offered, including inventory system, license management, support, consulting, security concepts, and training.
- Created 'kontakt.html' for contact information, including email and phone details, along with a booking section for appointments.
- Created 'projekte.html' to highlight current and past projects and clients, providing insights into collaborations with educational institutions.
- Created 'team.html' to introduce the team structure, roles, and selected references in the educational sector.

Website/templates/base.html

@@ -7,7 +7,7 @@
     <meta name="mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
-    <title>{% block title %}IT Loesungen{% endblock %}</title>
+    <title>{% block title %}IT Lösungen{% endblock %}</title>
     {% block head %}
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
@@ -264,10 +264,10 @@
         <div class="site-shell site-nav-inner">
             <a class="brand" href="{{ url_for('default') }}">Invario</a>
             <div class="nav-links" aria-label="Main Navigation">
-                <a href="{{ url_for('default') }}#leistungen">Dienstleistungen</a>
-                <a href="{{ url_for('default') }}#projekte">Projekte</a>
-                <a href="{{ url_for('default') }}#team">Team</a>
-                <a href="{{ url_for('default') }}#kontakt">Kontakt</a>
+                <a href="{{ url_for('dienstleistungen') }}">Dienstleistungen</a>
+                <a href="{{ url_for('projekte') }}">Projekte</a>
+                <a href="{{ url_for('team') }}">Team</a>
+                <a href="{{ url_for('kontakt') }}">Kontakt</a>
             </div>
             <div class="nav-actions">
                 {% if 'username' in session %}
@@ -283,13 +283,6 @@
                         </div>
                     </details>
 
-                    <details class="nav-dropdown">
-                        <summary class="nav-btn">Inhalte</summary>
-                        <div class="dropdown-menu">
-                            <a href="{{ url_for('blog') }}">Blog</a>
-                        </div>
-                    </details>
-
                     {% if session.get('is_admin') %}
                         <details class="nav-dropdown">
                             <summary class="nav-btn">Admin</summary>
@@ -331,7 +324,7 @@
             <div class="footer-content">
                 <div class="footer-section">
                     <h4>Über uns</h4>
-                    <p>Wir bieten professionelle IT-Lösungen und Dienstleistungen für Ihr Unternehmen.</p>
+                    <p>Wir bieten professionelle IT-Lösungen für Ihre Inventur.</p>
                 </div>
                 <div class="footer-section">
                     <h4>Schnelllinks</h4>