diff --git a/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasVersionBindingModel.ts b/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasVersionBindingModel.ts
index b65737cf1..e6dabc448 100644
--- a/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasVersionBindingModel.ts
+++ b/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasVersionBindingModel.ts
@@ -19,14 +19,22 @@ export const ITERATION_VERSION_REASON_LABELS: Record<
   'agent-revision': '智能体修订',
 };
 
-/** 版本在 UI 里的可读标识：创建原因 + 创建时间。 */
+/**
+ * 版本在 UI 里的可读标识：创建原因 + 创建时间。
+ *
+ * `GameIterationVersion.createdAt` 的单位是 **Unix 秒**（写入侧为
+ * `project/manifest.rs` 的 `created_at: unix_timestamp()`，而 `unix_timestamp()` 取
+ * `duration.as_secs()`）。这里必须换算成毫秒再交给 `Date`，否则秒值会被当成毫秒，
+ * 渲染成 1970 年（例如 1788075047 会显示成 1970/1/22）。
+ * 同一约定在 `ResourceAssetDeleteDialog` 与待确认资源编辑的创建时间标签里一致使用。
+ */
 export function formatIterationVersionLabel(
   version: Pick<GameIterationVersion, 'createdReason' | 'createdAt'>,
 ) {
   const reason =
     ITERATION_VERSION_REASON_LABELS[version.createdReason] ??
     version.createdReason;
-  const createdAt = new Date(version.createdAt);
+  const createdAt = new Date(version.createdAt * 1000);
   const time = Number.isFinite(createdAt.getTime())
     ? createdAt.toLocaleString('zh-CN')
     : String(version.createdAt);
diff --git a/apps/ai-game-creator-shell/tests/resourceCanvasVersionBindingModel.test.ts b/apps/ai-game-creator-shell/tests/resourceCanvasVersionBindingModel.test.ts
index 49c606858..eff1f4445 100644
--- a/apps/ai-game-creator-shell/tests/resourceCanvasVersionBindingModel.test.ts
+++ b/apps/ai-game-creator-shell/tests/resourceCanvasVersionBindingModel.test.ts
@@ -6,6 +6,13 @@ import {
   isResourceUsedByCurrentVersion,
 } from '../src/features/resource-canvas/resourceCanvasVersionBindingModel';
 
+/**
+ * 夹具必须与落盘口径一致：`versions[].createdAt` 是 **Unix 秒**。
+ *
+ * 写入侧见 `project/manifest.rs` 的 `created_at: unix_timestamp()`（`as_secs()`）。
+ * `1788075047` 取自真机项目 `What do u wanna do kitten` 的 `versions[0].createdAt`，
+ * 它被当成毫秒渲染时正好是 `1970/1/22 00:41:15`，即真机截图里的 1970 年。
+ */
 const versions = [
   {
     versionId: 'version-root',
@@ -15,7 +22,7 @@ const versions = [
       { slotId: 'asset:asset-player', resourceId: 'asset-player' },
     ],
     createdReason: 'initial' as const,
-    createdAt: 1_760_000_000_000,
+    createdAt: 1_788_075_047,
   },
   {
     versionId: 'version-child',
@@ -27,7 +34,7 @@ const versions = [
       { slotId: 'player', resourceId: 'asset-player' },
     ],
     createdReason: 'agent-revision' as const,
-    createdAt: 1_760_003_600_000,
+    createdAt: 1_788_075_104,
   },
 ];
 
@@ -80,10 +87,32 @@ describe('运行模块版本绑定判定', () => {
 
   test('labels a version with its Chinese created reason and creation time', () => {
     expect(formatIterationVersionLabel(versions[0])).toBe(
-      `初始版本 · ${new Date(1_760_000_000_000).toLocaleString('zh-CN')}`,
+      `初始版本 · ${new Date(1_788_075_047 * 1000).toLocaleString('zh-CN')}`,
     );
     expect(formatIterationVersionLabel(versions[1])).toBe(
-      `智能体修订 · ${new Date(1_760_003_600_000).toLocaleString('zh-CN')}`,
+      `智能体修订 · ${new Date(1_788_075_104 * 1000).toLocaleString('zh-CN')}`,
     );
   });
+
+  test('把版本 createdAt 的 Unix 秒换算成毫秒，不再渲染成 1970 年', () => {
+    // 期望值按同一个本地时区口径算出，用例结果不随运行机器时区漂移。
+    // 1788075047 秒 = 2026-08-30T07:30:47Z。
+    const createdAtLocal = new Date(1_788_075_047 * 1000).toLocaleString(
+      'zh-CN',
+    );
+    const label = formatIterationVersionLabel(versions[0]);
+    expect(label).toBe(`初始版本 · ${createdAtLocal}`);
+
+    // 年 / 月 / 日必须来自真实时刻，而不是 1970。这里用显式数值选项断言，
+    // 不依赖 `toLocaleString` 的具体排版（不同 ICU 版本会给出不同分隔符）。
+    expect(
+      new Intl.DateTimeFormat('zh-CN', {
+        year: 'numeric',
+        month: 'numeric',
+        day: 'numeric',
+      }).format(new Date(1_788_075_047 * 1000)),
+    ).toBe('2026/8/30');
+    // 回归守卫：按毫秒解释同一个值会落到 1970/1/22，这正是真机截图里的错误显示。
+    expect(label).not.toContain('1970');
+  });
 });
diff --git a/apps/ai-game-creator-shell/tests/resourceVersionSwitch.test.tsx b/apps/ai-game-creator-shell/tests/resourceVersionSwitch.test.tsx
index ec60f2b9d..931034082 100644
--- a/apps/ai-game-creator-shell/tests/resourceVersionSwitch.test.tsx
+++ b/apps/ai-game-creator-shell/tests/resourceVersionSwitch.test.tsx
@@ -77,6 +77,7 @@ function createVersionedManifest(): GameCreationAppManifest {
       source: { kind: 'generated' },
     },
   ];
+  // createdAt 是 Unix 秒（写入侧 manifest.rs 用 unix_timestamp()）。
   manifest.versions = [
     {
       versionId: 'version-root',
@@ -86,7 +87,7 @@ function createVersionedManifest(): GameCreationAppManifest {
         { slotId: 'asset:asset-player', resourceId: 'asset-player' },
       ],
       createdReason: 'initial',
-      createdAt: 1_760_000_000_000,
+      createdAt: 1_788_075_047,
     },
     {
       versionId: 'version-child',
@@ -96,7 +97,7 @@ function createVersionedManifest(): GameCreationAppManifest {
         { slotId: 'asset:asset-town', resourceId: 'asset-town' },
       ],
       createdReason: 'agent-revision',
-      createdAt: 1_760_003_600_000,
+      createdAt: 1_788_075_104,
     },
   ];
   return manifest;
diff --git a/packages/shared/src/contracts/gameCreationApp.ts b/packages/shared/src/contracts/gameCreationApp.ts
index d975d77f5..8dcc3bfdd 100644
--- a/packages/shared/src/contracts/gameCreationApp.ts
+++ b/packages/shared/src/contracts/gameCreationApp.ts
@@ -767,6 +767,13 @@ export interface GameIterationVersion {
   projectRevision: number;
   resourceBindings: GameIterationVersionResourceBinding[];
   createdReason: GameIterationVersionCreatedReason;
+  /**
+   * 创建时间，单位是 **Unix 秒**。
+   *
+   * 写入侧为 `project/manifest.rs` 的 `created_at: unix_timestamp()`，该函数返回
+   * `duration.as_secs()`，全仓版本条目统一按秒落盘。渲染时必须换算成毫秒
+   * （`new Date(createdAt * 1000)`），不要把秒值直接交给 `Date`。
+   */
   createdAt: number;
   editPrompt?: string | null;
 }