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

packages/frontend/core/src/modules/peek-view/view/doc-preview/doc-peek-view.tsx

@@ -58,7 +58,8 @@ function fitViewport(
       viewport.setViewportByBound(
         Bound.deserialize(newViewport.xywh),
         newViewport.padding,
-        false
+        false,
+        true
       );
     } else {
       gfx.fitToScreen({