Custom Commands für Agents: gleiche Befehls-UI wie Sessions, im Chat werden Agent- und Session-Commands zusammengeführt

Backend:
- AgentRecord um CustomCommands-Feld erweitert
- DB-Migration: custom_commands Spalte für agents Tabelle
- Agent-CRUD (Create/Update) verarbeitet customCommands

Frontend:
- commands-ui.js: Shared Utility (createCommandRow, getCommandsFromUI, loadCommandsIntoUI) für Agent- und Session-Page
- Agent-Page: Benutzerdefinierte Befehle Sektion mit Typ-Dropdown
- Chat-Page: Lädt Agent-Commands + Session-Commands, zeigt beide mit Labels wenn beide vorhanden
- Session-Page: Refactored auf shared commands-ui.js Funktionen
- CSS: cmd-bar-label Styling für Agent:/Session: Trennung in der Command-Bar

wwwroot/js/pages/chat-page.js

@@ -57,13 +57,44 @@ registerPage('chat', {
       titleEl.textContent = session.name || 'Unbenannt';
     }
 
-    // Custom Command Buttons
+    // Custom Command Buttons (Agent + Session)
     const cmdBar = document.getElementById('customCmdBar');
     if (cmdBar) {
       cmdBar.innerHTML = '';
-      let cmds = [];
-      try { cmds = JSON.parse(session.customCommands || '[]') || []; } catch(e) {}
-      cmds.forEach(cmd => {
+      let agentCmds = [];
+      if (session.agentId) {
+        try {
+          const agent = await apiGetAgent(session.agentId);
+          if (agent && agent.customCommands) {
+            agentCmds = JSON.parse(agent.customCommands) || [];
+          }
+        } catch(e) {}
+      }
+      let sessionCmds = [];
+      try { sessionCmds = JSON.parse(session.customCommands || '[]') || []; } catch(e) {}
+
+      const allCmds = agentCmds.concat(sessionCmds);
+      const hasAgentCmds = agentCmds.length > 0;
+      const hasSessionCmds = sessionCmds.length > 0;
+      const hasBoth = hasAgentCmds && hasSessionCmds;
+
+      if (hasBoth) {
+        const sep1 = document.createElement('span');
+        sep1.className = 'cmd-bar-label';
+        sep1.textContent = 'Agent:';
+        cmdBar.appendChild(sep1);
+      }
+
+      let sessionSepAdded = false;
+      let cmdIndex = 0;
+      allCmds.forEach((cmd, idx) => {
+        if (hasBoth && !sessionSepAdded && idx === agentCmds.length) {
+          const sep2 = document.createElement('span');
+          sep2.className = 'cmd-bar-label';
+          sep2.textContent = 'Session:';
+          cmdBar.appendChild(sep2);
+          sessionSepAdded = true;
+        }
         if (!cmd.name || !cmd.command) return;
         const type = cmd.type || 'background';
         const btn = document.createElement('button');