fix: Fix rare NullPointerException + log it to sentry (#2657)

Author: LouisCAD

app/src/main/java/com/infomaniak/mail/ui/newMessage/NewMessageViewModel.kt

@@ -356,15 +356,22 @@ class NewMessageViewModel @Inject constructor(
     }
 
     private suspend fun setReplyForwardDraftValues(draft: Draft, fullMessage: Message) {
+
         with(draftInitManager) {
             draft.setPreviousMessage(draftMode = draftMode, previousMessage = fullMessage)
         }
 
         val quote = draftInitManager.createQuote(draftMode, fullMessage, draft.attachments)
         if (quote != null) initialQuote = quote
 
+        if (fullMessage.body == null) {
+            SentryLog.e(TAG, "The message we're trying to reply to has an unexpected null body") { scope ->
+                scope.setExtra("Message resource", fullMessage.resource)
+            }
+        }
+
         val isAiEnabled = currentMailbox().featureFlags.contains(FeatureFlag.AI)
-        if (isAiEnabled) parsePreviousMailToAnswerWithAi(fullMessage.body!!)
+        if (isAiEnabled) parsePreviousMailToAnswerWithAi(fullMessage.body)
 
         val isEncryptionEnabled = currentMailbox().featureFlags.contains(FeatureFlag.ENCRYPTION)
         if (isEncryptionEnabled) draft.isEncrypted = fullMessage.isEncrypted
@@ -567,9 +574,9 @@ class NewMessageViewModel @Inject constructor(
         }
     }
 
-    private suspend fun parsePreviousMailToAnswerWithAi(previousMessageBody: Body) {
+    private suspend fun parsePreviousMailToAnswerWithAi(previousMessageBody: Body?) {
         if (draftMode == DraftMode.REPLY || draftMode == DraftMode.REPLY_ALL) {
-            aiSharedData.previousMessageBodyPlainText = previousMessageBody.asPlainText()
+            aiSharedData.previousMessageBodyPlainText = previousMessageBody?.asPlainText()
         }
     }