Dashboard: Placeholder-Cards durch Header-Buttons ersetzen + UI-Feinschliff

- Placeholder-Cards (Neue Session/Neuer Agent) entfernt
- Stattdessen Buttons in den Section-Headern neben den Titeln
- Section-Header h2 Font-Size angepasst
- Agent-Formular: Ego- und Skills-Labels hinzugefügt, Text-Korrektur
- Form-CSS: Gap und Checkbox-Spacing verfeinert, Selektoren präzisiert

wwwroot/css/dashboard.css

@@ -38,6 +38,10 @@
   margin-bottom: var(--box-spacing);
 }
 
+.section-header h2 {
+  font-size: calc(var(--font-size) * 1.3);
+}
+
 .card-grid {
   display: grid;
   grid-template-columns: repeat(auto-fill, minmax(22em, 1fr));
@@ -139,20 +143,8 @@
   color: var(--secondary);
 }
 
-#newAgentCard,
-#newSessionCard {
-  margin-top: var(--box-spacing);
-}
-
-#newAgentCard .card,
-#newSessionCard .card {
-  align-items: center;
-  justify-content: center;
-}
-
-#newAgentCard .card-body,
-#newSessionCard .card-body {
-  padding: var(--button-padding);
+.section-add-btn {
+  font-size: var(--font-size);
 }
 
 /* Card Menu */

wwwroot/css/form.css

@@ -2,7 +2,7 @@
   padding: var(--page-padding);
   display: flex;
   flex-direction: column;
-  gap: var(--box-spacing);
+  gap: var(--badge-spacing);
   width: 100%;
 }
 
@@ -103,12 +103,12 @@
 
 /* ── Checkbox ── */
 
-.checkbox-label {
+label.checkbox-label {
   display: flex;
   align-items: center;
   gap: var(--badge-spacing);
   cursor: pointer;
-  margin-top: var(--box-spacing);
+  margin-top: var(--badge-spacing);
 }
 
 .checkbox-label input[type="checkbox"] {
@@ -131,7 +131,7 @@
   gap: var(--badge-spacing);
 }
 
-.skill-item {
+label.skill-item {
   display: flex;
   align-items: center;
   gap: var(--badge-spacing);