feat: Implement account deletion feature with UI and API integration

mobile-app/shared/src/commonMain/kotlin/de/tsschulz/tt_tagebuch/shared/api/AuthApi.kt

@@ -1,9 +1,11 @@
 package de.tsschulz.tt_tagebuch.shared.api
 
 import de.tsschulz.tt_tagebuch.shared.api.http.AuthedHttpClient
+import de.tsschulz.tt_tagebuch.shared.api.models.DeleteAccountRequest
 import de.tsschulz.tt_tagebuch.shared.api.models.LoginRequest
 import de.tsschulz.tt_tagebuch.shared.api.models.LoginResponse
 import io.ktor.client.call.body
+import io.ktor.client.request.delete
 import io.ktor.client.request.post
 import io.ktor.client.request.setBody
 
@@ -19,4 +21,10 @@ class AuthApi(
     suspend fun logout() {
         client.http.post("/api/auth/logout")
     }
+
+    suspend fun deleteAccount(password: String) {
+        client.http.delete("/api/auth/account") {
+            setBody(DeleteAccountRequest(password = password))
+        }
+    }
 }

mobile-app/shared/src/commonMain/kotlin/de/tsschulz/tt_tagebuch/shared/api/models/LoginRequest.kt

@@ -8,3 +8,8 @@ data class LoginRequest(
     val password: String,
     val rememberMe: Boolean = false,
 )
+
+@Serializable
+data class DeleteAccountRequest(
+    val password: String,
+)

mobile-app/shared/src/commonMain/kotlin/de/tsschulz/tt_tagebuch/shared/state/AuthManager.kt

@@ -54,6 +54,11 @@ class AuthManager(
         clearLocal()
     }
 
+    suspend fun deleteAccount(password: String) {
+        authApi.deleteAccount(password)
+        clearLocal()
+    }
+
     suspend fun clearLocal() {
         tokenProvider.token = null
         tokenProvider.username = null