fix: Unable to sync the cipher with a null password history last used date

common/src/commonMain/kotlin/com/artemchep/keyguard/provider/bitwarden/entity/request/PasswordHistoryRequest.kt

@@ -10,14 +10,19 @@ data class PasswordHistoryRequest(
     @SerialName("password")
     val password: String,
     @SerialName("lastUsedDate")
-    val lastUsedDate: Instant?,
+    val lastUsedDate: Instant,
 )
 
 fun PasswordHistoryRequest.Companion.of(
     model: BitwardenCipher.Login.PasswordHistory,
 ) = kotlin.run {
+    val lastUsedDate = model.lastUsedDate
+        // Bitwarden forces us to have a last used date for
+        // the password history item. It still allows for existing
+        // items to have it as null tho.
+        ?: Instant.fromEpochMilliseconds(0)
     PasswordHistoryRequest(
         password = model.password,
-        lastUsedDate = model.lastUsedDate,
+        lastUsedDate = lastUsedDate,
     )
 }

common/src/commonMain/kotlin/com/artemchep/keyguard/provider/bitwarden/mapper/CipherMapping.kt

@@ -182,7 +182,11 @@ suspend fun BitwardenCipher.Login.toDomain(
 
 fun BitwardenCipher.Login.PasswordHistory.toDomain() = DSecret.Login.PasswordHistory(
     password = password,
-    lastUsedDate = lastUsedDate,
+    // Bitwarden forces us to have a last used date for
+    // the password history item. The ones that had it as
+    // null will end up converted to the zero Unix timestamp.
+    lastUsedDate = lastUsedDate
+        ?.takeUnless { it.epochSeconds == 0L },
 )
 
 fun BitwardenCipher.Login.PasswordStrength.toDomain() = PasswordStrength(