feat: unify phase one creation flow

src/services/miniGameDraftGenerationProgress.ts

@@ -467,6 +467,24 @@ function clampProgress(value: number) {
   return Math.max(0, Math.min(100, Math.round(value)));
 }
 
+export function resolveMiniGameDraftGenerationStartedAtMs(
+  startedAt: string | number | null | undefined,
+  fallbackMs = Date.now(),
+) {
+  if (typeof startedAt === 'number' && Number.isFinite(startedAt)) {
+    return startedAt;
+  }
+
+  if (typeof startedAt === 'string') {
+    const parsed = Date.parse(startedAt);
+    if (Number.isFinite(parsed)) {
+      return parsed;
+    }
+  }
+
+  return fallbackMs;
+}
+
 function getStepDefinitions(kind: MiniGameDraftGenerationKind) {
   if (kind === 'puzzle') {
     return buildPuzzleSteps(createMiniGameDraftGenerationState('puzzle'));
@@ -542,6 +560,7 @@ function buildMiniGameProgressSteps(
 
 export function createMiniGameDraftGenerationState(
   kind: MiniGameDraftGenerationKind,
+  startedAtMs = Date.now(),
 ): MiniGameDraftGenerationState {
   return {
     kind,
@@ -559,7 +578,7 @@ export function createMiniGameDraftGenerationState(
             : kind === 'wooden-fish'
               ? 'wooden-fish-draft'
               : 'compile',
-    startedAtMs: Date.now(),
+    startedAtMs,
     completedAssetCount: 0,
     totalAssetCount: 0,
     error: null,