Add password encoding utility and update forms to use encoded passwords for secure data transmission. Enhance axios request interceptor to handle FormData content type correctly.

src/utils/passwordCrypto.ts

@@ -0,0 +1,41 @@
+// Parola transport kodlamasi.
+// Parolalarin istek govdesinde DUZ METIN gorunmesini engellemek icin Base64 ile kodlanir.
+// Backend "b64:" on ekini gorunce cozer. (Not: Bu HTTPS/TLS'in yerini tutmaz, ek bir gizleme katmanidir.)
+
+const PREFIX = 'b64:'
+
+/**
+ * Verilen parolayi UTF-8 guvenli sekilde Base64'e kodlar ve "b64:" on eki ekler.
+ * Bos/null/undefined degerler oldugu gibi (bos string) donulur.
+ */
+export function encodePassword(value: string | null | undefined): string {
+  if (value === null || value === undefined || value === '') return ''
+
+  const bytes = new TextEncoder().encode(String(value))
+  let binary = ''
+  bytes.forEach((b) => {
+    binary += String.fromCharCode(b)
+  })
+
+  return PREFIX + btoa(binary)
+}
+
+/**
+ * Verilen nesnenin sig kopyasini olusturur ve belirtilen alanlari encode eder.
+ * Reactive store nesnelerini bozmamak icin daima yeni bir nesne doner.
+ */
+export function withEncodedPasswords<T extends Record<string, any>>(
+  data: T,
+  fields: string[]
+): T {
+  const clone: Record<string, any> = { ...data }
+
+  fields.forEach((field) => {
+    const current = clone[field]
+    if (current !== null && current !== undefined && current !== '') {
+      clone[field] = encodePassword(current)
+    }
+  })
+
+  return clone as T
+}