feat(ui): add cv application frontend and configuration

src/admin/hooks/useFormValidation.js

@@ -0,0 +1,69 @@
+import { useState } from 'react';
+
+export function useFormValidation(rules) {
+  const [errors, setErrors] = useState({});
+  
+  const validate = (data) => {
+    const newErrors = {};
+    
+    Object.entries(rules).forEach(([field, fieldRules]) => {
+      for (const rule of fieldRules) {
+        const error = rule(data[field], data);
+        if (error) {
+          newErrors[field] = error;
+          break;
+        }
+      }
+    });
+    
+    setErrors(newErrors);
+    return Object.keys(newErrors).length === 0;
+  };
+  
+  const clearError = (field) => {
+    setErrors(prev => {
+      const next = { ...prev };
+      delete next[field];
+      return next;
+    });
+  };
+  
+  const clearAllErrors = () => setErrors({});
+  
+  return { errors, validate, clearError, clearAllErrors };
+}
+
+export const validators = {
+  required: (message = 'Pflichtfeld') => (value) => {
+    if (!value || (typeof value === 'string' && !value.trim())) {
+      return message;
+    }
+    return null;
+  },
+  
+  email: (message = 'Ungültige E-Mail-Adresse') => (value) => {
+    if (!value) return null;
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    if (!emailRegex.test(value)) {
+      return message;
+    }
+    return null;
+  },
+  
+  url: (message = 'Ungültige URL') => (value) => {
+    if (!value) return null;
+    try {
+      new URL(value);
+      return null;
+    } catch {
+      return message;
+    }
+  },
+  
+  minLength: (min, message) => (value) => {
+    if (!value || value.length < min) {
+      return message || `Mindestens ${min} Zeichen`;
+    }
+    return null;
+  }
+};