🔀 feat: Save & Submit Message Content Parts (#8171)

* 🐛 fix: Enhance provider validation and error handling in getProviderConfig function

* WIP: edit text part

* refactor: Allow updating of both TEXT and THINK content types in message updates

* WIP: first pass, save & submit

* chore: remove legacy generation user message field

* feat: merge edited content

* fix: update placeholder and description for bedrock setting

* fix: remove unsupported warning message for AI resubmission

client/src/common/types.ts

@@ -336,6 +336,11 @@ export type TAskProps = {
 export type TOptions = {
   editedMessageId?: string | null;
   editedText?: string | null;
+  editedContent?: {
+    index: number;
+    text: string;
+    type: 'text' | 'think';
+  };
   isRegenerate?: boolean;
   isContinued?: boolean;
   isEdited?: boolean;