feat: Eigene Danke-Seite nach erfolgreicher Buchung

- Neue /danke Route mit ansprechendem Design
- Animierter Checkmark mit Pulse-Effekt
- Nächste Schritte Cards (E-Mail, Terminabstimmung, Kontakt)
- Trust-Elemente mit Vereinsinfos
- Payment Links leiten jetzt auf /danke um

🤖 Generated with Claude Code

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

package-lock.json

@@ -11,7 +11,8 @@
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+      "license": "MIT",
+      "engines": {
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+        "url": "https://opencollective.com/express"
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     "node_modules/cross-spawn": {
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@@ -3369,6 +3383,44 @@
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+      "license": "MIT",
+      "dependencies": {
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+        "set-cookie-parser": "^2.6.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
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+      "peerDependenciesMeta": {
+        "react-dom": {
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+    "node_modules/react-router-dom": {
+      "version": "7.10.0",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.10.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+      "engines": {
+        "node": ">=20.0.0"
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@@ -3501,6 +3553,12 @@
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+      "license": "MIT"
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