Increase VectorEngine timeouts and add image UI

Add VectorEngine image generation config and raise request timeouts (env + scripts) from 180000 to 1000000ms. Introduce a reusable CreativeImageInputPanel component with tests and wire up mobile keyboard-focus helpers; update generation views and related tests (CustomWorldGenerationView, BarkBattle editor, Match3D, Puzzle flows). Improve API error handling / VectorEngine request guidance (packages/shared http.ts and docs), and apply multiple backend/frontend fixes for puzzle/match3d/prompt handling. Also include extensive docs and decision-log updates describing UI/UX decisions and verification steps.

src/components/match3d-runtime/Match3DRuntimeShell.test.tsx

@@ -483,7 +483,30 @@ test('运行态会换签并渲染抓大鹅中心容器 UI 图', async () => {
   );
 });
 
-test('容器图换签失败时保留默认圆形容器兜底', async () => {
+test('运行态没有生成容器时使用透明参考容器兜底', async () => {
+  const run = startLocalMatch3DRun(3);
+
+  renderRuntime(run, []);
+
+  let containerImage!: HTMLImageElement;
+  await waitFor(() => {
+    containerImage = screen.getByTestId(
+      'match3d-container-image',
+    ) as HTMLImageElement;
+    expect(containerImage.getAttribute('src')).toBe(
+      '/match3d-background-references/pot-fused-reference.png',
+    );
+  });
+  fireEvent.load(containerImage);
+  expect(screen.getByTestId('match3d-board').className).toContain(
+    'bg-transparent',
+  );
+  expect(screen.getByTestId('match3d-board').className).not.toContain(
+    'rounded-full',
+  );
+});
+
+test('容器图换签失败时使用透明参考容器兜底', async () => {
   const run = startLocalMatch3DRun(3);
   const generatedItemAssets: Match3DGeneratedItemAsset[] = [
     {
@@ -515,12 +538,17 @@ test('容器图换签失败时保留默认圆形容器兜底', async () => {
   await waitFor(() => {
     expect(globalThis.fetch).toHaveBeenCalled();
   });
-  expect(screen.queryByTestId('match3d-container-image')).toBeNull();
+  await waitFor(() => {
+    expect(
+      screen.getByTestId('match3d-container-image').getAttribute('src'),
+    ).toBe('/match3d-background-references/pot-fused-reference.png');
+  });
+  fireEvent.load(screen.getByTestId('match3d-container-image'));
   expect(screen.getByTestId('match3d-board').className).toContain(
-    'rounded-full',
+    'bg-transparent',
   );
   expect(screen.getByTestId('match3d-board').className).not.toContain(
-    'bg-transparent',
+    'rounded-full',
   );
 });