feat: batch import/export for prompts (Issue #28 Debug B)

Dev→Prod Sync in 2 Klicks: Export → Import

Backend:
- GET /api/prompts/export-all → JSON mit allen Prompts
- POST /api/prompts/import?overwrite=true/false → Import + Create/Update
  - Returns: created, updated, skipped counts
  - Validates JSON structure
  - Handles stages JSON conversion

Frontend AdminPromptsPage:
- Button "📦 Alle exportieren" → downloads all-prompts-{date}.json
- Button "📥 Importieren" → file upload dialog
  - User-Prompt: Überschreiben? Ja/Nein
  - Success-Message mit Statistik (created/updated/skipped)

Frontend api.js:
- exportAllPrompts()
- importPrompts(data, overwrite)

Use Cases:
1. Backup: Prompts als JSON sichern
2. Dev→Prod: Auf dev.mitai entwickeln → exportieren → auf mitai.jinkendo importieren
3. Versionierung: Prompts in Git speichern

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

backend/routers/prompts.py

@@ -922,3 +922,132 @@ def update_unified_prompt(prompt_id: str, p: UnifiedPromptUpdate, session: dict
         )
 
     return {"ok": True}
+
+
+@router.get("/export-all")
+def export_all_prompts(session: dict = Depends(require_admin)):
+    """
+    Export all prompts as JSON array.
+    Admin only. Used for backup and dev→prod sync.
+    """
+    from datetime import datetime
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        cur.execute("SELECT * FROM ai_prompts ORDER BY sort_order, slug")
+        prompts = [r2d(row) for row in cur.fetchall()]
+
+    # Convert to export format (clean up DB-specific fields)
+    export_data = []
+    for p in prompts:
+        export_item = {
+            'slug': p['slug'],
+            'name': p['name'],
+            'display_name': p.get('display_name'),
+            'description': p.get('description'),
+            'type': p.get('type', 'pipeline'),
+            'category': p.get('category', 'ganzheitlich'),
+            'template': p.get('template'),
+            'stages': p.get('stages'),
+            'output_format': p.get('output_format', 'text'),
+            'output_schema': p.get('output_schema'),
+            'active': p.get('active', True),
+            'sort_order': p.get('sort_order', 0)
+        }
+        export_data.append(export_item)
+
+    return {
+        'export_date': datetime.now().isoformat(),
+        'count': len(export_data),
+        'prompts': export_data
+    }
+
+
+@router.post("/import")
+def import_prompts(
+    data: dict,
+    overwrite: bool = False,
+    session: dict = Depends(require_admin)
+):
+    """
+    Import prompts from JSON export.
+
+    Args:
+        data: Export data from /export-all endpoint
+        overwrite: If true, update existing prompts. If false, skip duplicates.
+
+    Returns:
+        Summary of import results (created, updated, skipped)
+    """
+    if 'prompts' not in data:
+        raise HTTPException(400, "Invalid import data: missing 'prompts' key")
+
+    prompts = data['prompts']
+    created = 0
+    updated = 0
+    skipped = 0
+    errors = []
+
+    with get_db() as conn:
+        cur = get_cursor(conn)
+
+        for p in prompts:
+            slug = p.get('slug')
+            if not slug:
+                errors.append('Prompt without slug skipped')
+                continue
+
+            # Check if exists
+            cur.execute("SELECT id FROM ai_prompts WHERE slug=%s", (slug,))
+            existing = cur.fetchone()
+
+            if existing and not overwrite:
+                skipped += 1
+                continue
+
+            # Prepare stages JSON if present
+            stages_json = None
+            if p.get('stages'):
+                stages_json = json.dumps(p['stages']) if isinstance(p['stages'], list) else p['stages']
+
+            if existing:
+                # Update existing
+                cur.execute("""
+                    UPDATE ai_prompts SET
+                        name=%s, display_name=%s, description=%s, type=%s,
+                        category=%s, template=%s, stages=%s, output_format=%s,
+                        output_schema=%s, active=%s, sort_order=%s,
+                        updated=CURRENT_TIMESTAMP
+                    WHERE slug=%s
+                """, (
+                    p.get('name'), p.get('display_name'), p.get('description'),
+                    p.get('type', 'pipeline'), p.get('category', 'ganzheitlich'),
+                    p.get('template'), stages_json, p.get('output_format', 'text'),
+                    p.get('output_schema'), p.get('active', True),
+                    p.get('sort_order', 0), slug
+                ))
+                updated += 1
+            else:
+                # Create new
+                cur.execute("""
+                    INSERT INTO ai_prompts (
+                        slug, name, display_name, description, type, category,
+                        template, stages, output_format, output_schema,
+                        active, sort_order, created, updated
+                    ) VALUES (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,CURRENT_TIMESTAMP,CURRENT_TIMESTAMP)
+                """, (
+                    slug, p.get('name'), p.get('display_name'), p.get('description'),
+                    p.get('type', 'pipeline'), p.get('category', 'ganzheitlich'),
+                    p.get('template'), stages_json, p.get('output_format', 'text'),
+                    p.get('output_schema'), p.get('active', True), p.get('sort_order', 0)
+                ))
+                created += 1
+
+        conn.commit()
+
+    return {
+        'success': True,
+        'created': created,
+        'updated': updated,
+        'skipped': skipped,
+        'errors': errors if errors else None
+    }

frontend/src/pages/AdminPromptsPage.jsx

@@ -17,6 +17,8 @@ export default function AdminPromptsPage() {
   const [error, setError] = useState(null)
   const [editingPrompt, setEditingPrompt] = useState(null)
   const [showNewPrompt, setShowNewPrompt] = useState(false)
+  const [importing, setImporting] = useState(false)
+  const [importResult, setImportResult] = useState(null)
 
   const categories = [
     { id: 'all', label: 'Alle Kategorien' },
@@ -167,6 +169,53 @@ export default function AdminPromptsPage() {
     return 'var(--text3)'
   }
 
+  const handleExportAll = async () => {
+    try {
+      const data = await api.exportAllPrompts()
+      const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' })
+      const url = URL.createObjectURL(blob)
+      const a = document.createElement('a')
+      a.href = url
+      a.download = `all-prompts-${new Date().toISOString().split('T')[0]}.json`
+      document.body.appendChild(a)
+      a.click()
+      document.body.removeChild(a)
+      URL.revokeObjectURL(url)
+    } catch (e) {
+      setError('Export-Fehler: ' + e.message)
+    }
+  }
+
+  const handleImport = async (event) => {
+    const file = event.target.files[0]
+    if (!file) return
+
+    setImporting(true)
+    setError(null)
+    setImportResult(null)
+
+    try {
+      const text = await file.text()
+      const data = JSON.parse(text)
+
+      // Ask user about overwrite
+      const overwrite = confirm(
+        'Bestehende Prompts überschreiben?\n\n' +
+        'JA = Existierende Prompts aktualisieren\n' +
+        'NEIN = Nur neue Prompts erstellen, Duplikate überspringen'
+      )
+
+      const result = await api.importPrompts(data, overwrite)
+      setImportResult(result)
+      await loadPrompts()
+    } catch (e) {
+      setError('Import-Fehler: ' + e.message)
+    } finally {
+      setImporting(false)
+      event.target.value = '' // Reset file input
+    }
+  }
+
   return (
     <div style={{
       padding: 20,
@@ -183,6 +232,24 @@ export default function AdminPromptsPage() {
         <h1 style={{ margin: 0, fontSize: 24, fontWeight: 600 }}>
           KI-Prompts ({filteredPrompts.length})
         </h1>
+        <div style={{ display: 'flex', gap: 8 }}>
+          <button
+            className="btn"
+            onClick={handleExportAll}
+            title="Alle Prompts als JSON exportieren (Backup / Dev→Prod Sync)"
+          >
+            📦 Alle exportieren
+          </button>
+          <label className="btn" style={{ margin: 0, cursor: 'pointer' }}>
+            📥 Importieren
+            <input
+              type="file"
+              accept=".json"
+              onChange={handleImport}
+              disabled={importing}
+              style={{ display: 'none' }}
+            />
+          </label>
           <button
             className="btn btn-primary"
             onClick={() => setShowNewPrompt(true)}
@@ -190,6 +257,7 @@ export default function AdminPromptsPage() {
             + Neuer Prompt
           </button>
         </div>
+      </div>
 
       {error && (
         <div style={{
@@ -203,6 +271,30 @@ export default function AdminPromptsPage() {
         </div>
       )}
 
+      {importResult && (
+        <div style={{
+          padding: 16,
+          background: '#efe',
+          color: '#060',
+          borderRadius: 8,
+          marginBottom: 16
+        }}>
+          <div style={{ fontWeight: 600, marginBottom: 4 }}>
+            ✅ Import erfolgreich
+          </div>
+          <div style={{ fontSize: 13 }}>
+            {importResult.created} erstellt · {importResult.updated} aktualisiert · {importResult.skipped} übersprungen
+          </div>
+          <button
+            onClick={() => setImportResult(null)}
+            style={{ marginTop: 8, fontSize: 12, padding: '4px 8px' }}
+            className="btn"
+          >
+            OK
+          </button>
+        </div>
+      )}
+
       {/* Filters */}
       <div style={{
         display: 'flex',

frontend/src/utils/api.js

@@ -318,4 +318,12 @@ export const api = {
   },
   createUnifiedPrompt:    (d)     => req('/prompts/unified', json(d)),
   updateUnifiedPrompt:    (id,d)  => req(`/prompts/unified/${id}`, jput(d)),
+
+  // Batch Import/Export
+  exportAllPrompts:       ()      => req('/prompts/export-all'),
+  importPrompts:          (data, overwrite=false) => {
+    const params = new URLSearchParams()
+    if (overwrite) params.append('overwrite', 'true')
+    return req(`/prompts/import?${params}`, json(data))
+  },
 }