feat: Part 3 - End Node Template Editor

**Neue Features:**
- End Node Output Mode: AUTO vs. TEMPLATE
- Jinja2 Template Editor mit Syntax-Beispiel
- Placeholder Picker Modal (dynamische Node-Liste)
- Template Serialisierung/Deserialisierung

**Komponenten (NEU):**
1. EndNodeConfig.jsx (~150 Zeilen)
   - Output Mode Toggle (AUTO/TEMPLATE)
   - Template Textarea (monospace, 12 Zeilen)
   - Placeholder-Button (öffnet Picker)
   - Help-Text mit Beispiel-Syntax
   - Auto-Insert Default Template beim Wechsel zu TEMPLATE

2. PlaceholderPicker.jsx (~260 Zeilen)
   - Modal mit Suchfunktion
   - Dynamische Placeholder-Liste aus Workflow-Nodes
   - Kategorien: Global, Node Outputs, Signals
   - Click-to-Insert (schließt Modal automatisch)
   - Icons pro Node-Typ (🚀🤖⚡🔀🏁)

**Integration:**
- WorkflowEditorPage.jsx
  - EndNodeConfig im Config Panel (wenn type='end')
  - PlaceholderPicker State + Modal
  - handlePlaceholderSelect (fügt in Template ein)

**Serialisierung:**
- workflowSerializer.js
  - Serialize: output_mode + template für End Nodes
  - Deserialize: output_mode + template laden
  - Fallback: auto Mode wenn nicht gesetzt

**Backend Status:**
- ✅ Backend bereits fertig (execute_end_node() in workflow_executor.py)
- ✅ Beide Modi (AUTO/TEMPLATE) funktionieren
- ✅ Jinja2 Template Rendering implementiert

**Part 3 Status:** Frontend Complete
- ✅ End Node Config UI
- ✅ Template Editor
- ✅ Placeholder Picker
- ⏸️ Testing ausstehend

**Nächster Schritt:**
Browser-Test auf dev.mitai.jinkendo.de

Version: v0.9p
Date: 2026-04-09

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/version.py

@@ -7,7 +7,7 @@ Semantic Versioning: MAJOR.MINOR.PATCH
 - PATCH: Bugfix, kleine Änderung, Refactor
 """
 
-APP_VERSION = "0.9o"
+APP_VERSION = "0.9p"
 BUILD_DATE = "2026-04-09"
 DB_SCHEMA_VERSION = "20260406e"  # Migration 041
 

frontend/src/components/workflow/panels/EndNodeConfig.jsx

@@ -0,0 +1,162 @@
+/**
+ * EndNodeConfig - Konfiguration für End Nodes
+ *
+ * Props:
+ * - node: React Flow Node object (type='end')
+ * - onChange: (nodeId, updates) => void
+ * - onOpenPlaceholderPicker: () => void (optional, für späteren Placeholder Picker)
+ *
+ * Features:
+ * - Output Mode: AUTO (concatenate all analyses) vs. TEMPLATE (custom Jinja2 template)
+ * - Template Editor (Textarea für Jinja2 syntax)
+ */
+export function EndNodeConfig({ node, onChange, onOpenPlaceholderPicker }) {
+  const outputMode = node.data.output_mode || 'auto'
+  const template = node.data.template || ''
+
+  const handleModeChange = (e) => {
+    const newMode = e.target.value
+    onChange(node.id, { output_mode: newMode })
+
+    // Wenn zu TEMPLATE gewechselt wird und kein Template vorhanden, Beispiel einfügen
+    if (newMode === 'template' && !template) {
+      onChange(node.id, {
+        output_mode: newMode,
+        template: '# Finale Analyse\n\n{{ analysis_core }}\n\n---\nGeneriert mit Workflow Engine'
+      })
+    }
+  }
+
+  const handleTemplateChange = (e) => {
+    onChange(node.id, { template: e.target.value })
+  }
+
+  return (
+    <div className="config-section">
+      <h3>End Node Konfiguration</h3>
+
+      <label>Output-Modus</label>
+      <select
+        value={outputMode}
+        onChange={handleModeChange}
+        style={{
+          width: '100%',
+          padding: '8px',
+          borderRadius: '4px',
+          border: '1px solid var(--border)',
+          background: 'var(--surface)',
+          color: 'var(--text1)'
+        }}
+      >
+        <option value="auto">AUTO - Automatisch zusammenfassen</option>
+        <option value="template">TEMPLATE - Eigenes Template</option>
+      </select>
+
+      <div
+        className="help-text"
+        style={{
+          marginTop: '8px',
+          fontSize: '12px',
+          color: 'var(--text3)',
+          lineHeight: '1.4'
+        }}
+      >
+        {outputMode === 'auto' && (
+          <>
+            <strong>AUTO-Modus:</strong> Alle analysis_core Werte werden automatisch
+            zusammengefasst (backward compatible).
+          </>
+        )}
+        {outputMode === 'template' && (
+          <>
+            <strong>TEMPLATE-Modus:</strong> Verwende Jinja2-Syntax für eigenes Output-Format.
+            Verfügbare Variablen: Alle Node-IDs und deren Outputs.
+          </>
+        )}
+      </div>
+
+      {outputMode === 'template' && (
+        <>
+          <label style={{ marginTop: '16px' }}>
+            Jinja2 Template
+            {onOpenPlaceholderPicker && (
+              <button
+                onClick={onOpenPlaceholderPicker}
+                style={{
+                  marginLeft: '8px',
+                  padding: '4px 8px',
+                  fontSize: '11px',
+                  background: 'var(--accent)',
+                  color: 'white',
+                  border: 'none',
+                  borderRadius: '4px',
+                  cursor: 'pointer'
+                }}
+                title="Placeholder-Auswahl öffnen"
+              >
+                📋 Platzhalter
+              </button>
+            )}
+          </label>
+          <textarea
+            value={template}
+            onChange={handleTemplateChange}
+            placeholder="# Finale Analyse&#10;&#10;{{ node_1.analysis_core }}&#10;&#10;{{ node_2.analysis_core }}"
+            rows={12}
+            style={{
+              width: '100%',
+              padding: '8px',
+              borderRadius: '4px',
+              border: '1px solid var(--border)',
+              background: 'var(--bg)',
+              color: 'var(--text1)',
+              fontFamily: 'monospace',
+              fontSize: '13px',
+              lineHeight: '1.6',
+              resize: 'vertical'
+            }}
+          />
+
+          <div
+            className="help-text"
+            style={{
+              marginTop: '8px',
+              fontSize: '11px',
+              color: 'var(--text3)'
+            }}
+          >
+            💡 Beispiel-Syntax:
+            <pre
+              style={{
+                marginTop: '4px',
+                padding: '6px',
+                background: 'var(--surface2)',
+                borderRadius: '4px',
+                fontSize: '10px',
+                overflow: 'auto'
+              }}
+            >
+{`{{ node_1.analysis_core }}
+{% if node_2.signal_intensity == "hoch" %}
+  Hohe Intensität erkannt!
+{% endif %}`}
+            </pre>
+          </div>
+        </>
+      )}
+
+      <div
+        className="help-text"
+        style={{
+          marginTop: '16px',
+          fontSize: '11px',
+          color: 'var(--text3)',
+          paddingTop: '12px',
+          borderTop: '1px solid var(--border)'
+        }}
+      >
+        🏁 Part 3: End Node Template Engine
+      </div>
+    </div>
+  )
+}

frontend/src/components/workflow/panels/PlaceholderPicker.jsx

@@ -0,0 +1,265 @@
+import { useState } from 'react'
+
+/**
+ * PlaceholderPicker - Modal zur Auswahl von Template-Platzhaltern
+ *
+ * Props:
+ * - nodes: Array of workflow nodes (to extract available placeholders)
+ * - onSelect: (placeholderString) => void - Callback when placeholder is selected
+ * - onClose: () => void
+ *
+ * Features:
+ * - Lists all available node outputs
+ * - Copy to clipboard or insert into template
+ * - Kategorisiert nach Node-Typ
+ */
+export function PlaceholderPicker({ nodes, onSelect, onClose }) {
+  const [searchQuery, setSearchQuery] = useState('')
+
+  // Extrahiere verfügbare Platzhalter aus Nodes
+  const placeholders = extractPlaceholders(nodes)
+
+  // Filtere basierend auf Suchquery
+  const filteredPlaceholders = placeholders.filter(p =>
+    p.placeholder.toLowerCase().includes(searchQuery.toLowerCase()) ||
+    p.description.toLowerCase().includes(searchQuery.toLowerCase())
+  )
+
+  const handleSelect = (placeholderString) => {
+    onSelect(placeholderString)
+    onClose() // Schließe Modal nach Auswahl
+  }
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        top: 0,
+        left: 0,
+        right: 0,
+        bottom: 0,
+        background: 'rgba(0,0,0,0.5)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        zIndex: 2000
+      }}
+      onClick={onClose}
+    >
+      <div
+        style={{
+          background: 'var(--surface)',
+          borderRadius: '12px',
+          padding: '24px',
+          maxWidth: '600px',
+          width: '90%',
+          maxHeight: '80vh',
+          display: 'flex',
+          flexDirection: 'column',
+          boxShadow: '0 4px 16px rgba(0,0,0,0.2)'
+        }}
+        onClick={(e) => e.stopPropagation()}
+      >
+        {/* Header */}
+        <div
+          style={{
+            display: 'flex',
+            justifyContent: 'space-between',
+            alignItems: 'center',
+            marginBottom: '16px'
+          }}
+        >
+          <h2 style={{ margin: 0, fontSize: '18px' }}>Platzhalter auswählen</h2>
+          <button
+            onClick={onClose}
+            style={{
+              background: 'none',
+              border: 'none',
+              fontSize: '24px',
+              cursor: 'pointer',
+              color: 'var(--text3)',
+              padding: '4px 8px',
+              lineHeight: 1
+            }}
+          >
+            ×
+          </button>
+        </div>
+
+        {/* Search */}
+        <input
+          type="text"
+          placeholder="Suche nach Node oder Variable..."
+          value={searchQuery}
+          onChange={(e) => setSearchQuery(e.target.value)}
+          style={{
+            width: '100%',
+            padding: '8px 12px',
+            borderRadius: '8px',
+            border: '1px solid var(--border)',
+            background: 'var(--bg)',
+            color: 'var(--text1)',
+            fontSize: '14px',
+            marginBottom: '16px'
+          }}
+        />
+
+        {/* Placeholder List */}
+        <div
+          style={{
+            flex: 1,
+            overflowY: 'auto',
+            borderRadius: '8px',
+            border: '1px solid var(--border)'
+          }}
+        >
+          {filteredPlaceholders.length === 0 ? (
+            <div
+              style={{
+                padding: '24px',
+                textAlign: 'center',
+                color: 'var(--text3)',
+                fontSize: '14px'
+              }}
+            >
+              {searchQuery ? 'Keine Platzhalter gefunden' : 'Keine Nodes im Workflow'}
+            </div>
+          ) : (
+            <div style={{ display: 'flex', flexDirection: 'column' }}>
+              {filteredPlaceholders.map((p, idx) => (
+                <div
+                  key={idx}
+                  onClick={() => handleSelect(p.placeholder)}
+                  style={{
+                    padding: '12px',
+                    borderBottom: idx < filteredPlaceholders.length - 1 ? '1px solid var(--border)' : 'none',
+                    cursor: 'pointer',
+                    transition: 'background 0.2s'
+                  }}
+                  onMouseEnter={(e) => e.currentTarget.style.background = 'var(--surface2)'}
+                  onMouseLeave={(e) => e.currentTarget.style.background = 'transparent'}
+                >
+                  <div
+                    style={{
+                      display: 'flex',
+                      justifyContent: 'space-between',
+                      alignItems: 'center'
+                    }}
+                  >
+                    <div style={{ flex: 1 }}>
+                      <div
+                        style={{
+                          fontFamily: 'monospace',
+                          fontSize: '13px',
+                          color: 'var(--accent)',
+                          marginBottom: '4px'
+                        }}
+                      >
+                        {p.placeholder}
+                      </div>
+                      <div
+                        style={{
+                          fontSize: '12px',
+                          color: 'var(--text3)'
+                        }}
+                      >
+                        {p.description}
+                      </div>
+                    </div>
+                    <div
+                      style={{
+                        fontSize: '20px',
+                        marginLeft: '12px',
+                        color: 'var(--text3)'
+                      }}
+                    >
+                      {p.icon}
+                    </div>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Footer */}
+        <div
+          style={{
+            marginTop: '16px',
+            padding: '12px',
+            background: 'var(--bg)',
+            borderRadius: '8px',
+            fontSize: '12px',
+            color: 'var(--text3)'
+          }}
+        >
+          💡 <strong>Syntax:</strong> <code style={{ background: 'var(--surface2)', padding: '2px 6px', borderRadius: '4px' }}>{'{{ node_id.field }}'}</code>
+          <br />
+          Verfügbare Felder: <code>analysis_core</code>, <code>signal_*</code> (wenn Fragen vorhanden)
+        </div>
+      </div>
+    </div>
+  )
+}
+
+/**
+ * Extrahiert verfügbare Platzhalter aus Workflow-Nodes
+ */
+function extractPlaceholders(nodes) {
+  const placeholders = []
+
+  // Globale Platzhalter
+  placeholders.push({
+    placeholder: '{{ analysis_core }}',
+    description: 'Finale Analyse (AUTO-Modus Fallback)',
+    icon: '🏁',
+    category: 'global'
+  })
+
+  // Node-spezifische Platzhalter
+  nodes.forEach(node => {
+    if (node.type === 'end') return // End Node hat keine Outputs
+
+    const nodeId = node.id
+    const label = node.data.label || nodeId
+
+    // analysis_core für alle Analysis/Logic/Join Nodes
+    if (node.type === 'analysis' || node.type === 'logic' || node.type === 'join') {
+      placeholders.push({
+        placeholder: `{{ ${nodeId}.analysis_core }}`,
+        description: `${getNodeIcon(node.type)} ${label} - Hauptausgabe`,
+        icon: getNodeIcon(node.type),
+        category: 'node_outputs'
+      })
+    }
+
+    // Signals für Analysis Nodes mit Fragen
+    if (node.type === 'analysis' && node.data.questions && node.data.questions.length > 0) {
+      node.data.questions.forEach(q => {
+        const questionId = q.id || `q${placeholders.length}`
+        placeholders.push({
+          placeholder: `{{ ${nodeId}.signal_${questionId} }}`,
+          description: `${label} - Signal: ${q.question?.substring(0, 40)}...`,
+          icon: '📊',
+          category: 'signals'
+        })
+      })
+    }
+  })
+
+  return placeholders
+}
+
+/**
+ * Node-Typ zu Icon
+ */
+function getNodeIcon(type) {
+  const icons = {
+    start: '🚀',
+    analysis: '🤖',
+    logic: '⚡',
+    join: '🔀',
+    end: '🏁'
+  }
+  return icons[type] || '📦'
+}

frontend/src/pages/WorkflowEditorPage.jsx

@@ -14,6 +14,8 @@ import { QuestionAugmentationPanel } from '../components/workflow/panels/Questio
 import { LogicExpressionEditor } from '../components/workflow/panels/LogicExpressionEditor'
 import { FallbackConfig } from '../components/workflow/panels/FallbackConfig'
 import { JoinConfig } from '../components/workflow/panels/JoinConfig'
+import { EndNodeConfig } from '../components/workflow/panels/EndNodeConfig'
+import { PlaceholderPicker } from '../components/workflow/panels/PlaceholderPicker'
 import { WorkflowExecutePanel } from '../components/workflow/panels/WorkflowExecutePanel'
 import { WorkflowResultViewer } from '../components/workflow/panels/WorkflowResultViewer'
 import '../styles/workflowEditor.css'
@@ -47,6 +49,7 @@ export default function WorkflowEditorPage() {
   const [error, setError] = useState(null)
   const [availablePrompts, setAvailablePrompts] = useState([])
   const [executionResult, setExecutionResult] = useState(null)
+  const [showPlaceholderPicker, setShowPlaceholderPicker] = useState(false)
 
   // Load available basis prompts for Analysis nodes
   useEffect(() => {
@@ -257,6 +260,15 @@ export default function WorkflowEditorPage() {
     setExecutionResult(result)
   }
 
+  const handlePlaceholderSelect = (placeholderString) => {
+    if (!selectedNode || selectedNode.type !== 'end') return
+
+    const currentTemplate = selectedNode.data.template || ''
+    const newTemplate = currentTemplate + placeholderString
+
+    handleNodeUpdate(selectedNode.id, { template: newTemplate })
+  }
+
   // ── Render ────────────────────────────────────────────────────────────────
 
   return (
@@ -480,6 +492,14 @@ export default function WorkflowEditorPage() {
             {selectedNode.type === 'join' && (
               <JoinConfig node={selectedNode} onChange={handleNodeUpdate} />
             )}
+
+            {selectedNode.type === 'end' && (
+              <EndNodeConfig
+                node={selectedNode}
+                onChange={handleNodeUpdate}
+                onOpenPlaceholderPicker={() => setShowPlaceholderPicker(true)}
+              />
+            )}
           </div>
         )}
       </div>
@@ -522,6 +542,15 @@ export default function WorkflowEditorPage() {
           onClose={() => setExecutionResult(null)}
         />
       )}
+
+      {/* Placeholder Picker Modal */}
+      {showPlaceholderPicker && (
+        <PlaceholderPicker
+          nodes={nodes}
+          onSelect={handlePlaceholderSelect}
+          onClose={() => setShowPlaceholderPicker(false)}
+        />
+      )}
     </div>
   )
 }

frontend/src/utils/workflowSerializer.js

@@ -36,6 +36,11 @@ export function serializeToWorkflowGraph(nodes, edges, metadata = {}) {
       join_strategy: node.data.join_strategy || 'wait_all',
       skip_handling: node.data.skip_handling || 'ignore_skipped',
       min_paths: node.data.min_paths || 2
+    }),
+
+    ...(node.type === 'end' && {
+      output_mode: node.data.output_mode || 'auto',
+      template: node.data.template || null
     })
   }))
 
@@ -93,6 +98,11 @@ export function deserializeFromWorkflowGraph(jsonbData) {
         join_strategy: node.join_strategy || 'wait_all',
         skip_handling: node.skip_handling || 'ignore_skipped',
         min_paths: node.min_paths || 2
+      }),
+
+      ...(node.type === 'end' && {
+        output_mode: node.output_mode || 'auto',
+        template: node.template || null
       })
     }
   }))