fix(editor): incorrect edgeless viewport in peek view (#11040)

### What Changes
- Fixed incorrect edgeless viewport display in peek view
  - Moved page block viewport fit animation logic from `EdgelessRootBlockComponent` to note config extension
  - Disabled page block viewport fit animation in peek view, using default `fitToScreen` instead
  - @doodlewind Fixed viewport resizing issues by adding a immediate update mechanism to ensure proper rendering during peek view operations.  The setViewportByBound is only called once during peek view initialization, so there are barely perf overhead.
- Updated related test cases
  - Refactored peek view test cases to make them clearer and more reliable
  - Added new test helper function `getViewportBound` for getting viewport boundary information

tests/kit/src/utils/editor.ts

@@ -109,6 +109,17 @@ export async function getViewportCenter(page: Page, editorIndex = 0) {
   });
 }
 
+export async function getViewportBound(page: Page, editorIndex = 0) {
+  const container = locateEditorContainer(page, editorIndex);
+  return container.evaluate(container => {
+    const root = container.querySelector('affine-edgeless-root');
+    if (!root) {
+      throw new Error('Edgeless root not found');
+    }
+    return root.gfx.viewport.viewportBounds.toXYWH();
+  });
+}
+
 export async function setViewportCenter(
   page: Page,
   center: IVec,