streamline createCommit helper

frontend/src/App.tsx

@@ -184,9 +184,7 @@ function App() {
     const updatedParams = { ...params, ...settings };
 
     const baseCommitObject = {
-      date_created: new Date(),
       variants: [{ code: "" }, { code: "" }],
-      selectedVariantIndex: 0,
     };
 
     const commitInputObject =
@@ -345,9 +343,7 @@ function App() {
     const commit = createCommit({
       type: "code_create",
       parentHash: null,
-      date_created: new Date(),
       variants: [{ code }],
-      selectedVariantIndex: 0,
       inputs: null,
     });
     addCommit(commit);

frontend/src/components/commits/types.ts

@@ -7,7 +7,7 @@ export type Variant = {
 export type BaseCommit = {
   hash: CommitHash;
   parentHash: CommitHash | null;
-  date_created: Date;
+  dateCreated: Date;
   variants: Variant[];
   selectedVariantIndex: number;
 };

frontend/src/components/commits/utils.ts

@@ -8,10 +8,10 @@ import {
 
 export function createCommit(
   commit:
-    | Omit<AiCreateCommit, "hash">
-    | Omit<AiEditCommit, "hash">
-    | Omit<CodeCreateCommit, "hash">
+    | Omit<AiCreateCommit, "hash" | "dateCreated" | "selectedVariantIndex">
+    | Omit<AiEditCommit, "hash" | "dateCreated" | "selectedVariantIndex">
+    | Omit<CodeCreateCommit, "hash" | "dateCreated" | "selectedVariantIndex">
 ): Commit {
   const hash = nanoid();
-  return { ...commit, hash };
+  return { ...commit, hash, dateCreated: new Date(), selectedVariantIndex: 0 };
 }

frontend/src/components/history/HistoryDisplay.tsx

@@ -22,7 +22,7 @@ export default function HistoryDisplay({ shouldDisableReverts }: Props) {
   // Put all commits into an array and sort by created date (oldest first)
   const flatHistory = Object.values(commits).sort(
     (a, b) =>
-      new Date(a.date_created).getTime() - new Date(b.date_created).getTime()
+      new Date(a.dateCreated).getTime() - new Date(b.dateCreated).getTime()
   );
 
   // Annotate history items with a summary, parent version, etc.