feat: add Mietvertrag workflow and template management in n8n, including email notifications and document handling

Co-authored-by: Copilot <copilot@github.com>

data/n8n/.n8n/n8nEventLog.log

@@ -34,3 +34,7 @@
 {"__type":"$$EventMessageConfirm","confirm":"eb33d71c-ab1e-45e7-b8a1-c2f4233db4cc","ts":"2026-04-29T20:02:02.388+02:00","source":{"id":"0","name":"eventBus"}}
 {"__type":"$$EventMessageWorkflow","id":"0da331f2-66a0-45fd-b691-d4c28a01598c","ts":"2026-04-29T20:02:02.404+02:00","eventName":"n8n.workflow.success","message":"n8n.workflow.success","payload":{"userId":"aeec9612-50f4-4124-889e-83325fb5af8a","executionId":"2","success":true,"isManual":true,"mode":"manual","workflowId":"MiEBjJYxhUVm6sl3","workflowName":"New Lead Notification","projectId":"julyz3yhfTK4pMNd","projectName":"MC Cars <admin@mccars.local>"}}
 {"__type":"$$EventMessageConfirm","confirm":"0da331f2-66a0-45fd-b691-d4c28a01598c","ts":"2026-04-29T20:02:02.404+02:00","source":{"id":"0","name":"eventBus"}}
+{"__type":"$$EventMessageAudit","id":"a0ac56d7-5dd2-4d92-ba16-9480f5d7be4e","ts":"2026-04-29T21:40:47.656+02:00","eventName":"n8n.audit.workflow.created","message":"n8n.audit.workflow.created","payload":{"userId":"aeec9612-50f4-4124-889e-83325fb5af8a","_email":"admin@mccars.local","_firstName":"MC","_lastName":"Cars","globalRole":"global:owner","workflowId":"5254P6wnxXA4bhWf","workflowName":"Lead Qualified → Payment Email"}}
+{"__type":"$$EventMessageConfirm","confirm":"a0ac56d7-5dd2-4d92-ba16-9480f5d7be4e","ts":"2026-04-29T21:40:47.656+02:00","source":{"id":"0","name":"eventBus"}}
+{"__type":"$$EventMessageAudit","id":"8b319e39-54c7-41d6-a1f6-4a28fcc9f340","ts":"2026-04-29T21:41:00.236+02:00","eventName":"n8n.audit.workflow.created","message":"n8n.audit.workflow.created","payload":{"userId":"aeec9612-50f4-4124-889e-83325fb5af8a","_email":"admin@mccars.local","_firstName":"MC","_lastName":"Cars","globalRole":"global:owner","workflowId":"40NOffvLouMXkVPO","workflowName":"Lead Qualified → Mietvertrag PDF"}}
+{"__type":"$$EventMessageConfirm","confirm":"8b319e39-54c7-41d6-a1f6-4a28fcc9f340","ts":"2026-04-29T21:41:00.236+02:00","source":{"id":"0","name":"eventBus"}}

docker-compose.local.yml

@@ -24,6 +24,7 @@ services:
       - ./supabase/migrations/07-sales-orders.sql:/sql/07-sales-orders.sql:ro
       - ./supabase/migrations/08-backend-pricing-and-security.sql:/sql/08-backend-pricing-and-security.sql:ro
       - ./supabase/migrations/09-site-settings.sql:/sql/09-site-settings.sql:ro
+      - ./supabase/migrations/10-mietvertrag-workflow.sql:/sql/10-mietvertrag-workflow.sql:ro
 
   kong:
     volumes:

docker-compose.yml

@@ -217,6 +217,7 @@ services:
       - /mnt/user/appdata/mc-cars/supabase/migrations/07-sales-orders.sql:/sql/07-sales-orders.sql:ro
       - /mnt/user/appdata/mc-cars/supabase/migrations/08-backend-pricing-and-security.sql:/sql/08-backend-pricing-and-security.sql:ro
       - /mnt/user/appdata/mc-cars/supabase/migrations/09-site-settings.sql:/sql/09-site-settings.sql:ro
+      - /mnt/user/appdata/mc-cars/supabase/migrations/10-mietvertrag-workflow.sql:/sql/10-mietvertrag-workflow.sql:ro
     entrypoint: ["sh","-c"]
     command:
       - |
@@ -242,6 +243,7 @@ services:
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/07-sales-orders.sql
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/08-backend-pricing-and-security.sql
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/09-site-settings.sql
+        psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/10-mietvertrag-workflow.sql
         echo "post-init done."
     restart: "no"
     networks: [mccars]
@@ -413,3 +415,19 @@ services:
       - "55590:5678"
     networks: [mccars]
     logging: { driver: json-file, options: { max-size: "10m", max-file: "3" } }
+
+  # -------------------------------------------------------------------------
+  # Gotenberg - headless document converter (DOCX → PDF)
+  # Used by n8n to generate Mietvertrag PDFs from DOCX templates.
+  # -------------------------------------------------------------------------
+  gotenberg:
+    image: gotenberg/gotenberg:8
+    container_name: mccars-gotenberg
+    restart: unless-stopped
+    command:
+      - "gotenberg"
+      - "--api-port=3000"
+      - "--api-timeout=60s"
+      - "--libreoffice-restart-after=10"
+    networks: [mccars]
+    logging: { driver: json-file, options: { max-size: "10m", max-file: "3" } }

frontend/admin.html

@@ -253,6 +253,16 @@
                     <p class="muted" style="font-size:0.82rem;" data-i18n="adminHeroImageHint">JPG/PNG/WebP. Wird als Hintergrundbild im Hero-Bereich der Website angezeigt.</p>
                     <p class="form-feedback" id="heroFeedback"></p>
                 </div>
+                <hr style="margin:2rem 0;border-color:var(--border);" />
+                <div class="admin-form">
+                    <label>
+                        <span data-i18n="adminMietvertragTemplate">Mietvertrag-Vorlage (DOCX)</span>
+                        <div id="mietvertragStatus" class="muted" style="font-size:0.9rem;margin:0.5rem 0;"></div>
+                        <input type="file" id="mietvertragInput" accept="application/vnd.openxmlformats-officedocument.wordprocessingml.document,.docx" />
+                    </label>
+                    <p class="muted" style="font-size:0.82rem;" data-i18n="adminMietvertragHint">DOCX-Vorlage mit Platzhaltern. Wird bei Qualifizierung automatisch ausgefüllt und als PDF per E-Mail versendet.</p>
+                    <p class="form-feedback" id="mietvertragFeedback"></p>
+                </div>
             </div>
         </div>
     </section>

frontend/admin.js

@@ -1108,11 +1108,25 @@ orderDialog.addEventListener("close", onDialogClose);
 const heroPreview    = document.querySelector("#heroPreview");
 const heroImageInput = document.querySelector("#heroImageInput");
 const heroFeedback   = document.querySelector("#heroFeedback");
+const mietvertragStatus   = document.querySelector("#mietvertragStatus");
+const mietvertragInput    = document.querySelector("#mietvertragInput");
+const mietvertragFeedback = document.querySelector("#mietvertragFeedback");
 
 async function renderSettings() {
     const { data } = await supabase.from("site_settings").select("value").eq("key", "hero_image_url").single();
     const url = data?.value || "/images/ferrari-main-car.png";
     heroPreview.style.backgroundImage = `url('${url}')`;
+
+    // Mietvertrag template status
+    const { data: tplData } = await supabase.from("site_settings").select("value").eq("key", "mietvertrag_template_path").single();
+    const tplPath = tplData?.value;
+    if (tplPath) {
+        mietvertragStatus.textContent = "✓ " + tplPath.split("/").pop();
+        mietvertragStatus.style.color = "var(--success, green)";
+    } else {
+        mietvertragStatus.textContent = t("adminMietvertragEmpty") || "Keine Vorlage hochgeladen.";
+        mietvertragStatus.style.color = "var(--muted)";
+    }
 }
 
 heroImageInput.addEventListener("change", async () => {
@@ -1145,4 +1159,32 @@ heroImageInput.addEventListener("change", async () => {
     }
 });
 
+mietvertragInput.addEventListener("change", async () => {
+    const file = mietvertragInput.files?.[0];
+    if (!file) return;
+    mietvertragFeedback.className = "form-feedback";
+    mietvertragFeedback.textContent = "Uploading...";
+    try {
+        const path = `mietvertrag/vorlage.docx`;
+        const { error: upErr } = await supabase.storage
+            .from("document-templates")
+            .upload(path, file, { contentType: file.type, upsert: true });
+        if (upErr) throw upErr;
+
+        // Save path to site_settings
+        const { error: dbErr } = await supabase
+            .from("site_settings")
+            .upsert({ key: "mietvertrag_template_path", value: path, updated_at: new Date().toISOString() }, { onConflict: "key" });
+        if (dbErr) throw dbErr;
+
+        mietvertragStatus.textContent = "✓ " + file.name;
+        mietvertragStatus.style.color = "var(--success, green)";
+        mietvertragFeedback.className = "form-feedback";
+        mietvertragFeedback.textContent = "Gespeichert.";
+    } catch (err) {
+        mietvertragFeedback.className = "form-feedback error";
+        mietvertragFeedback.textContent = err.message || String(err);
+    }
+});
+
 bootstrap();

frontend/i18n.js

@@ -133,6 +133,9 @@ export const translations = {
         adminSettings: "Einstellungen",
         adminHeroImage: "Hauptbild (Hero-Bereich)",
         adminHeroImageHint: "JPG/PNG/WebP. Wird als Hintergrundbild im Hero-Bereich der Website angezeigt.",
+        adminMietvertragTemplate: "Mietvertrag-Vorlage (DOCX)",
+        adminMietvertragHint: "DOCX-Vorlage mit Platzhaltern. Wird bei Qualifizierung automatisch ausgefüllt und als PDF per E-Mail versendet.",
+        adminMietvertragEmpty: "Keine Vorlage hochgeladen.",
         adminNewVehicle: "Neues Fahrzeug",
         adminAllVehicles: "Alle Fahrzeuge",
         adminPhotoUpload: "Foto hochladen (JPG/PNG/WebP, max 50 MB)",
@@ -364,6 +367,9 @@ export const translations = {
         adminSettings: "Settings",
         adminHeroImage: "Main Photo (Hero Section)",
         adminHeroImageHint: "JPG/PNG/WebP. Displayed as the background image in the hero section of the website.",
+        adminMietvertragTemplate: "Rental Contract Template (DOCX)",
+        adminMietvertragHint: "DOCX template with placeholders. Automatically filled and sent as PDF via email upon qualification.",
+        adminMietvertragEmpty: "No template uploaded.",
         adminNewVehicle: "New vehicle",
         adminAllVehicles: "All vehicles",
         adminPhotoUpload: "Upload photo (JPG/PNG/WebP, max 50 MB)",

n8n/workflows/01-qualification-payment-email.json

@@ -0,0 +1,96 @@
+{
+  "name": "Lead Qualified → Payment Email",
+  "nodes": [
+    {
+      "parameters": {
+        "triggerOnNotify": true,
+        "channel": "lead_qualified",
+        "additionalFields": {}
+      },
+      "id": "pg-trigger",
+      "name": "Postgres Trigger",
+      "type": "n8n-nodes-base.postgresTrigger",
+      "typeVersion": 1,
+      "position": [250, 300],
+      "credentials": {
+        "postgres": {
+          "id": "1",
+          "name": "MC Cars Postgres"
+        }
+      }
+    },
+    {
+      "parameters": {
+        "operation": "executeQuery",
+        "query": "SELECT c.id, c.name, c.email, c.phone,\n       so.order_number, so.total_eur, so.deposit_eur,\n       so.date_from, so.date_to, so.vehicle_label,\n       so.daily_subtotal, so.weekend_subtotal,\n       so.subtotal_eur, so.vat_eur,\n       so.total_days, so.weekday_count, so.weekend_day_count\nFROM public.customers c\nJOIN public.sales_orders so ON so.customer_id = c.id\nWHERE so.id = '{{ $json.sales_order_id }}'::uuid",
+        "additionalFields": {}
+      },
+      "id": "fetch-order-data",
+      "name": "Fetch Order Data",
+      "type": "n8n-nodes-base.postgres",
+      "typeVersion": 2.5,
+      "position": [470, 300],
+      "credentials": {
+        "postgres": {
+          "id": "1",
+          "name": "MC Cars Postgres"
+        }
+      }
+    },
+    {
+      "parameters": {
+        "fromEmail": "info@mc-cars.at",
+        "toEmail": "={{ $json.email }}",
+        "subject": "MC Cars – Ihre Buchung {{ $json.order_number }} – Zahlungsanweisungen",
+        "emailType": "html",
+        "html": "<div style=\"font-family:Arial,sans-serif;max-width:600px;margin:0 auto;\">\n  <div style=\"background:#1a1a1a;padding:20px;text-align:center;\">\n    <h1 style=\"color:#c87941;margin:0;\">MC Cars</h1>\n  </div>\n  <div style=\"padding:30px;background:#f9f9f9;\">\n    <p>Sehr geehrte/r <strong>{{ $json.name }}</strong>,</p>\n    <p>vielen Dank für Ihre Buchung! Hier sind Ihre Buchungsdetails und Zahlungsanweisungen:</p>\n    \n    <table style=\"width:100%;border-collapse:collapse;margin:20px 0;\">\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Bestellnummer:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">{{ $json.order_number }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Fahrzeug:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">{{ $json.vehicle_label }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Zeitraum:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">{{ $json.date_from }} – {{ $json.date_to }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Tage gesamt:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">{{ $json.total_days }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Netto:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">€{{ $json.subtotal_eur }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>MwSt (19%):</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\">€{{ $json.vat_eur }}</td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Gesamtbetrag:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>€{{ $json.total_eur }}</strong></td></tr>\n      <tr><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>Kaution:</strong></td><td style=\"padding:8px;border-bottom:1px solid #ddd;\"><strong>€{{ $json.deposit_eur }}</strong></td></tr>\n    </table>\n\n    <h3 style=\"color:#c87941;\">Zahlungsanweisungen</h3>\n    \n    <h4>1. Kaution (€{{ $json.deposit_eur }})</h4>\n    <p>Bitte überweisen Sie die Kaution auf folgendes Konto:</p>\n    <div style=\"background:#fff;padding:15px;border:1px solid #ddd;border-radius:5px;margin:10px 0;\">\n      <p style=\"margin:5px 0;\"><strong>Empfänger:</strong> MC Cars GmbH</p>\n      <p style=\"margin:5px 0;\"><strong>IBAN:</strong> AT00 0000 0000 0000 0000</p>\n      <p style=\"margin:5px 0;\"><strong>BIC:</strong> BKAUATWW</p>\n      <p style=\"margin:5px 0;\"><strong>Verwendungszweck:</strong> Kaution {{ $json.order_number }}</p>\n    </div>\n\n    <h4>2. Mietbetrag (€{{ $json.total_eur }})</h4>\n    <p>Den Mietbetrag können Sie bequem online bezahlen:</p>\n    <div style=\"text-align:center;margin:20px 0;\">\n      <a href=\"https://mc-cars.at/zahlung/{{ $json.order_number }}\" style=\"background:#c87941;color:#fff;padding:12px 30px;text-decoration:none;border-radius:5px;font-weight:bold;\">Jetzt bezahlen</a>\n    </div>\n    <p style=\"font-size:0.85em;color:#666;\">Oder überweisen Sie auf dasselbe Konto mit Verwendungszweck: <strong>Miete {{ $json.order_number }}</strong></p>\n\n    <hr style=\"border:none;border-top:1px solid #ddd;margin:25px 0;\" />\n    <p>Bei Fragen stehen wir Ihnen jederzeit zur Verfügung.</p>\n    <p>Mit freundlichen Grüßen,<br/><strong>MC Cars GmbH</strong><br/>info@mc-cars.at<br/>mc-cars.at</p>\n  </div>\n</div>",
+        "options": {}
+      },
+      "id": "send-email",
+      "name": "Send Payment Email",
+      "type": "n8n-nodes-base.emailSend",
+      "typeVersion": 2.1,
+      "position": [690, 300],
+      "credentials": {
+        "smtp": {
+          "id": "2",
+          "name": "MC Cars SMTP"
+        }
+      }
+    }
+  ],
+  "connections": {
+    "Postgres Trigger": {
+      "main": [
+        [
+          {
+            "node": "Fetch Order Data",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Fetch Order Data": {
+      "main": [
+        [
+          {
+            "node": "Send Payment Email",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    }
+  },
+  "settings": {
+    "executionOrder": "v1"
+  },
+  "staticData": null,
+  "tags": [
+    {
+      "name": "mc-cars"
+    }
+  ],
+  "triggerCount": 1
+}

n8n/workflows/02-mietvertrag-pdf-email.json

@@ -0,0 +1,291 @@
+{
+  "name": "Lead Qualified → Mietvertrag PDF",
+  "nodes": [
+    {
+      "parameters": {
+        "triggerOnNotify": true,
+        "channel": "lead_qualified",
+        "additionalFields": {}
+      },
+      "id": "pg-trigger-mv",
+      "name": "Postgres Trigger",
+      "type": "n8n-nodes-base.postgresTrigger",
+      "typeVersion": 1,
+      "position": [250, 300],
+      "credentials": {
+        "postgres": {
+          "id": "1",
+          "name": "MC Cars Postgres"
+        }
+      }
+    },
+    {
+      "parameters": {
+        "operation": "executeQuery",
+        "query": "SELECT value FROM public.site_settings WHERE key = 'mietvertrag_template_path'",
+        "additionalFields": {}
+      },
+      "id": "check-template",
+      "name": "Check Template Exists",
+      "type": "n8n-nodes-base.postgres",
+      "typeVersion": 2.5,
+      "position": [470, 300],
+      "credentials": {
+        "postgres": {
+          "id": "1",
+          "name": "MC Cars Postgres"
+        }
+      }
+    },
+    {
+      "parameters": {
+        "conditions": {
+          "options": {
+            "caseSensitive": true,
+            "leftValue": "",
+            "typeValidation": "strict"
+          },
+          "conditions": [
+            {
+              "id": "cond1",
+              "leftValue": "={{ $json.value }}",
+              "rightValue": "",
+              "operator": {
+                "type": "string",
+                "operation": "notEmpty"
+              }
+            }
+          ],
+          "combinator": "and"
+        },
+        "options": {}
+      },
+      "id": "if-template-exists",
+      "name": "Template Exists?",
+      "type": "n8n-nodes-base.if",
+      "typeVersion": 2,
+      "position": [670, 300]
+    },
+    {
+      "parameters": {
+        "operation": "executeQuery",
+        "query": "SELECT c.name, c.email, c.phone,\n       so.order_number, so.total_eur, so.deposit_eur,\n       so.date_from, so.date_to, so.vehicle_label,\n       so.daily_subtotal, so.weekend_subtotal,\n       so.subtotal_eur, so.vat_eur,\n       so.total_days, so.weekday_count, so.weekend_day_count,\n       to_char(so.date_from, 'DD.MM.YYYY') as date_from_de,\n       to_char(so.date_to, 'DD.MM.YYYY') as date_to_de,\n       to_char(now(), 'DD.MM.YYYY') as today_de\nFROM public.customers c\nJOIN public.sales_orders so ON so.customer_id = c.id\nWHERE so.id = '{{ $('Postgres Trigger').item.json.sales_order_id }}'::uuid",
+        "additionalFields": {}
+      },
+      "id": "fetch-full-data",
+      "name": "Fetch Full Order+Customer",
+      "type": "n8n-nodes-base.postgres",
+      "typeVersion": 2.5,
+      "position": [890, 200],
+      "credentials": {
+        "postgres": {
+          "id": "1",
+          "name": "MC Cars Postgres"
+        }
+      }
+    },
+    {
+      "parameters": {
+        "url": "=http://kong:8000/storage/v1/object/document-templates/{{ $('Check Template Exists').item.json.value }}",
+        "sendHeaders": true,
+        "headerParameters": {
+          "parameters": [
+            {
+              "name": "apikey",
+              "value": "={{ $env.SERVICE_ROLE_KEY || 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6InNlcnZpY2Vfcm9sZSIsImV4cCI6MTk4MzgxMjk5Nn0.EGIM96RAZx35lJzdJsyH-qQwv8Hdp7fsn3W0YpN81IU' }}"
+            },
+            {
+              "name": "Authorization",
+              "value": "=Bearer {{ $env.SERVICE_ROLE_KEY || 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6InNlcnZpY2Vfcm9sZSIsImV4cCI6MTk4MzgxMjk5Nn0.EGIM96RAZx35lJzdJsyH-qQwv8Hdp7fsn3W0YpN81IU' }}"
+            }
+          ]
+        },
+        "options": {
+          "response": {
+            "response": {
+              "responseFormat": "file"
+            }
+          }
+        }
+      },
+      "id": "download-template",
+      "name": "Download DOCX Template",
+      "type": "n8n-nodes-base.httpRequest",
+      "typeVersion": 4.2,
+      "position": [1110, 200]
+    },
+    {
+      "parameters": {
+        "jsCode": "// Fill DOCX template placeholders using simple text replacement.\n// The DOCX is a ZIP containing XML. We replace {{placeholder}} markers\n// in the document.xml with actual values from the order data.\n\nconst JSZip = require('jszip');\n\nconst binaryData = await this.helpers.getBinaryDataBuffer(0, 'data');\nconst orderData = $('Fetch Full Order+Customer').first().json;\n\n// Placeholders map\nconst placeholders = {\n  '{{KUNDE_NAME}}': orderData.name || '',\n  '{{KUNDE_EMAIL}}': orderData.email || '',\n  '{{KUNDE_TELEFON}}': orderData.phone || '',\n  '{{BESTELLNUMMER}}': orderData.order_number || '',\n  '{{FAHRZEUG}}': orderData.vehicle_label || '',\n  '{{DATUM_VON}}': orderData.date_from_de || '',\n  '{{DATUM_BIS}}': orderData.date_to_de || '',\n  '{{TAGE_GESAMT}}': String(orderData.total_days || 0),\n  '{{WOCHENTAGE}}': String(orderData.weekday_count || 0),\n  '{{WOCHENENDTAGE}}': String(orderData.weekend_day_count || 0),\n  '{{NETTO}}': String(orderData.subtotal_eur || 0),\n  '{{MWST}}': String(orderData.vat_eur || 0),\n  '{{GESAMT}}': String(orderData.total_eur || 0),\n  '{{KAUTION}}': String(orderData.deposit_eur || 0),\n  '{{TAGESSATZ}}': String(orderData.daily_subtotal || 0),\n  '{{WOCHENENDZUSCHLAG}}': String(orderData.weekend_subtotal || 0),\n  '{{DATUM_HEUTE}}': orderData.today_de || '',\n};\n\nconst zip = await JSZip.loadAsync(binaryData);\n\n// Process all XML files in the docx\nconst xmlFiles = Object.keys(zip.files).filter(f => f.endsWith('.xml'));\n\nfor (const xmlFile of xmlFiles) {\n  let content = await zip.file(xmlFile).async('string');\n  for (const [placeholder, value] of Object.entries(placeholders)) {\n    // Handle split placeholders in XML (Word splits text into runs)\n    // Simple approach: replace in the raw XML\n    const escaped = placeholder.replace(/[{}]/g, c => `\\\\${c}`);\n    content = content.split(placeholder).join(value);\n  }\n  zip.file(xmlFile, content);\n}\n\nconst filledDocx = await zip.generateAsync({ type: 'nodebuffer' });\n\nreturn [{\n  json: { filename: `Mietvertrag_${orderData.order_number}.docx` },\n  binary: {\n    data: await this.helpers.prepareBinaryData(filledDocx, `Mietvertrag_${orderData.order_number}.docx`, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document')\n  }\n}];"
+      },
+      "id": "fill-template",
+      "name": "Fill DOCX Template",
+      "type": "n8n-nodes-base.code",
+      "typeVersion": 2,
+      "position": [1330, 200]
+    },
+    {
+      "parameters": {
+        "url": "http://gotenberg:3000/forms/libreoffice/convert",
+        "method": "POST",
+        "sendBody": true,
+        "contentType": "multipart-form-data",
+        "bodyParameters": {
+          "parameters": [
+            {
+              "parameterType": "formBinaryData",
+              "name": "files",
+              "inputDataFieldName": "data"
+            }
+          ]
+        },
+        "options": {
+          "response": {
+            "response": {
+              "responseFormat": "file"
+            }
+          }
+        }
+      },
+      "id": "convert-to-pdf",
+      "name": "Convert to PDF (Gotenberg)",
+      "type": "n8n-nodes-base.httpRequest",
+      "typeVersion": 4.2,
+      "position": [1550, 200]
+    },
+    {
+      "parameters": {
+        "jsCode": "// Rename the binary output to have the correct PDF filename\nconst orderData = $('Fetch Full Order+Customer').first().json;\nconst binaryData = await this.helpers.getBinaryDataBuffer(0, 'data');\n\nreturn [{\n  json: { filename: `Mietvertrag_${orderData.order_number}.pdf`, email: orderData.email, name: orderData.name, order_number: orderData.order_number },\n  binary: {\n    data: await this.helpers.prepareBinaryData(binaryData, `Mietvertrag_${orderData.order_number}.pdf`, 'application/pdf')\n  }\n}];"
+      },
+      "id": "prepare-pdf",
+      "name": "Prepare PDF Attachment",
+      "type": "n8n-nodes-base.code",
+      "typeVersion": 2,
+      "position": [1770, 200]
+    },
+    {
+      "parameters": {
+        "fromEmail": "info@mc-cars.at",
+        "toEmail": "={{ $json.email }}",
+        "subject": "MC Cars – Ihr Mietvertrag {{ $json.order_number }}",
+        "emailType": "html",
+        "html": "<div style=\"font-family:Arial,sans-serif;max-width:600px;margin:0 auto;\">\n  <div style=\"background:#1a1a1a;padding:20px;text-align:center;\">\n    <h1 style=\"color:#c87941;margin:0;\">MC Cars</h1>\n  </div>\n  <div style=\"padding:30px;background:#f9f9f9;\">\n    <p>Sehr geehrte/r <strong>{{ $json.name }}</strong>,</p>\n    <p>anbei finden Sie Ihren Mietvertrag für die Bestellung <strong>{{ $json.order_number }}</strong>.</p>\n    <p>Bitte prüfen Sie die Angaben und bringen Sie den unterschriebenen Vertrag zur Fahrzeugübergabe mit.</p>\n    <hr style=\"border:none;border-top:1px solid #ddd;margin:25px 0;\" />\n    <p>Bei Fragen stehen wir Ihnen jederzeit zur Verfügung.</p>\n    <p>Mit freundlichen Grüßen,<br/><strong>MC Cars GmbH</strong><br/>info@mc-cars.at<br/>mc-cars.at</p>\n  </div>\n</div>",
+        "options": {
+          "attachments": "data"
+        }
+      },
+      "id": "send-mietvertrag",
+      "name": "Send Mietvertrag Email",
+      "type": "n8n-nodes-base.emailSend",
+      "typeVersion": 2.1,
+      "position": [1990, 200],
+      "credentials": {
+        "smtp": {
+          "id": "2",
+          "name": "MC Cars SMTP"
+        }
+      }
+    }
+  ],
+  "connections": {
+    "Postgres Trigger": {
+      "main": [
+        [
+          {
+            "node": "Check Template Exists",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Check Template Exists": {
+      "main": [
+        [
+          {
+            "node": "Template Exists?",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Template Exists?": {
+      "main": [
+        [
+          {
+            "node": "Fetch Full Order+Customer",
+            "type": "main",
+            "index": 0
+          }
+        ],
+        []
+      ]
+    },
+    "Fetch Full Order+Customer": {
+      "main": [
+        [
+          {
+            "node": "Download DOCX Template",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Download DOCX Template": {
+      "main": [
+        [
+          {
+            "node": "Fill DOCX Template",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Fill DOCX Template": {
+      "main": [
+        [
+          {
+            "node": "Convert to PDF (Gotenberg)",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Convert to PDF (Gotenberg)": {
+      "main": [
+        [
+          {
+            "node": "Prepare PDF Attachment",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Prepare PDF Attachment": {
+      "main": [
+        [
+          {
+            "node": "Send Mietvertrag Email",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    }
+  },
+  "settings": {
+    "executionOrder": "v1"
+  },
+  "staticData": null,
+  "tags": [
+    {
+      "name": "mc-cars"
+    }
+  ],
+  "triggerCount": 1
+}

n8n/workflows/README.md

@@ -0,0 +1,88 @@
+# n8n Workflows – MC Cars
+
+This folder contains exportable n8n workflow definitions for the MC Cars qualification automation.
+
+## Workflows
+
+### 01 – Qualification Payment Email
+**Trigger:** Postgres `NOTIFY` on channel `lead_qualified` (fires when `qualify_lead()` creates a sales order).
+
+**Flow:**
+1. Receives notification with `sales_order_id`, `customer_id`, etc.
+2. Fetches full order + customer data from Postgres.
+3. Sends HTML email to customer with:
+   - Booking summary (vehicle, dates, pricing)
+   - Kaution bank transfer instructions
+   - Payment link for the rental amount
+
+### 02 – Mietvertrag PDF Email
+**Trigger:** Same `lead_qualified` Postgres notification.
+
+**Flow:**
+1. Checks if `mietvertrag_template_path` is set in `site_settings`.
+2. If no template → workflow stops (no error).
+3. If template exists:
+   - Fetches customer + sales order data
+   - Downloads DOCX template from `document-templates` storage bucket
+   - Fills placeholders using JSZip (in a Code node)
+   - Converts filled DOCX to PDF via Gotenberg
+   - Sends PDF as email attachment to customer
+
+## Setup Instructions
+
+### 1. Create Postgres credential in n8n
+- **Name:** `MC Cars Postgres`
+- **Host:** `db`
+- **Port:** `5432`
+- **Database:** `postgres`
+- **User:** `postgres`
+- **Password:** (value of `POSTGRES_PASSWORD` from `.env`)
+
+### 2. Create SMTP credential in n8n
+- **Name:** `MC Cars SMTP`
+- **Host:** your SMTP server (e.g. `smtp.mailgun.org`, `mail.mc-cars.at`)
+- **Port:** `587` (TLS) or `465` (SSL)
+- **User:** your SMTP username
+- **Password:** your SMTP password
+- **From:** `info@mc-cars.at`
+
+### 3. Import workflows
+1. Open n8n at http://localhost:55590
+2. Go to **Workflows** → **Import from file**
+3. Import `01-qualification-payment-email.json`
+4. Import `02-mietvertrag-pdf-email.json`
+5. Open each workflow → assign the credentials created above → **Activate**
+
+### 4. Upload Mietvertrag template (optional)
+1. Open Admin panel → **Einstellungen** tab
+2. Upload a DOCX file in the "Mietvertrag-Vorlage" section
+3. The template should contain these placeholders:
+
+| Placeholder | Replaced with |
+|---|---|
+| `{{KUNDE_NAME}}` | Customer full name |
+| `{{KUNDE_EMAIL}}` | Customer email |
+| `{{KUNDE_TELEFON}}` | Customer phone |
+| `{{BESTELLNUMMER}}` | Sales order number (e.g. SO-2026-0001) |
+| `{{FAHRZEUG}}` | Vehicle label (e.g. "Ferrari 488 GTB") |
+| `{{DATUM_VON}}` | Rental start date (DD.MM.YYYY) |
+| `{{DATUM_BIS}}` | Rental end date (DD.MM.YYYY) |
+| `{{TAGE_GESAMT}}` | Total rental days |
+| `{{WOCHENTAGE}}` | Number of weekdays |
+| `{{WOCHENENDTAGE}}` | Number of weekend days |
+| `{{TAGESSATZ}}` | Weekday daily subtotal |
+| `{{WOCHENENDZUSCHLAG}}` | Weekend surcharge subtotal |
+| `{{NETTO}}` | Net amount (excl. VAT) |
+| `{{MWST}}` | VAT amount (19%) |
+| `{{GESAMT}}` | Total amount (incl. VAT) |
+| `{{KAUTION}}` | Deposit amount |
+| `{{DATUM_HEUTE}}` | Today's date (DD.MM.YYYY) |
+
+## Dependencies
+
+- **Gotenberg** (docker service `gotenberg`) — converts DOCX → PDF via LibreOffice
+- **n8n** needs the `jszip` npm package (pre-installed in n8n Docker image)
+
+## Domain
+
+All email links and sender addresses use `mc-cars.at`.

supabase/migrations/10-mietvertrag-workflow.sql

@@ -0,0 +1,66 @@
+-- 10-mietvertrag-workflow.sql
+-- Document templates bucket, mietvertrag setting, and qualification webhook trigger.
+
+-- 1. Storage bucket for admin-uploaded document templates (private, admin-only)
+insert into storage.buckets (id, name, public, file_size_limit, allowed_mime_types)
+values (
+    'document-templates',
+    'document-templates',
+    false,
+    20971520,
+    array['application/vnd.openxmlformats-officedocument.wordprocessingml.document']
+)
+on conflict (id) do nothing;
+
+-- RLS: only authenticated (admin) can read/write document-templates
+drop policy if exists "templates_admin_select" on storage.objects;
+create policy "templates_admin_select"
+    on storage.objects for select to authenticated
+    using (bucket_id = 'document-templates');
+
+drop policy if exists "templates_admin_insert" on storage.objects;
+create policy "templates_admin_insert"
+    on storage.objects for insert to authenticated
+    with check (bucket_id = 'document-templates');
+
+drop policy if exists "templates_admin_update" on storage.objects;
+create policy "templates_admin_update"
+    on storage.objects for update to authenticated
+    using (bucket_id = 'document-templates');
+
+-- 2. Site setting for Mietvertrag template (empty on startup)
+insert into public.site_settings (key, value)
+values ('mietvertrag_template_path', '')
+on conflict (key) do nothing;
+
+-- 3. Function to notify n8n when a lead is qualified (new sales order created)
+--    n8n listens on the 'lead_qualified' channel via Postgres trigger.
+create or replace function public.notify_lead_qualified()
+returns trigger
+language plpgsql
+security definer
+as $$
+begin
+    perform pg_notify('lead_qualified', json_build_object(
+        'sales_order_id', NEW.id,
+        'customer_id', NEW.customer_id,
+        'lead_id', NEW.lead_id,
+        'order_number', NEW.order_number,
+        'total_eur', NEW.total_eur,
+        'deposit_eur', NEW.deposit_eur,
+        'date_from', NEW.date_from,
+        'date_to', NEW.date_to,
+        'vehicle_label', NEW.vehicle_label
+    )::text);
+    return NEW;
+end;
+$$;
+
+-- Trigger on sales_orders insert (fires when qualify_lead creates the order)
+drop trigger if exists trg_notify_lead_qualified on public.sales_orders;
+create trigger trg_notify_lead_qualified
+    after insert on public.sales_orders
+    for each row
+    execute function public.notify_lead_qualified();
+
+notify pgrst, 'reload schema';