fix(apollo-react): addNodePanel scrolling [MST-9993]

[ayush578]

Make addNodePanel scrollable.
Also blocked the outer scroll i.e. FloatingCanvasPanel scroll only for addnodePanel

before

Screen.Recording.2026-05-26.at.4.15.57.PM.mov

after

Screen.Recording.2026-05-26.at.4.08.35.PM.mov

[Copilot]

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

[github-actions]

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Project	Deployment	Review	Updated (PT)
apollo-design	🟢 Ready	Preview, Logs	May 27, 2026, 01:29:18 AM
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apollo-ui-react	🟢 Ready	Preview, Logs	May 27, 2026, 01:29:18 AM
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[github-actions]

Dependency License Review

• ✅ 1901 package(s) scanned
• ✅ No license issues found
• ⚠️ 2 package(s) excluded (see details below)

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MIT	1671
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khroma	2.1.0	Unknown	MIT per GitHub repo, missing license field in package.json

[uipath-utkarsh]

Code review

The scrolling fix and the viewport-aware size cap are well put together (nice touches: the design-ceiling clamp, the reset-on-close to avoid a stale frame, the kept-in-sync comments). Three things worth addressing before merge — see inline. None block the AddNodeManager happy path; they're about the shared FloatingCanvasPanel contract and edge cases.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

packages/apollo-react/src/canvas/components/FloatingCanvasPanel/FloatingCanvasPanel.tsx:209

• In the useFixedPosition && anchorRect branch, the floating element never receives ref={refs.setFloating} (and no reference element is wired either). That means the new size() middleware in useFloatingPosition won’t run, so availableHeight stays null and sizingStyle won’t actually cap height or set --floating-available-height for fixed-position panels.

    const fixedContent = (
      <div
        className={cn('nodrag nopan nowheel', panelClassName)}
        onPointerEnter={onMouseEnter}
        onPointerLeave={onMouseLeave}
        style={{
          position: 'fixed',
          ...screenPosition,
          ...sizingStyle,
          zIndex: 1100,
          pointerEvents: 'auto',
        }}
      >
        <PanelChrome
          title={title}
          header={header}
          headerActions={headerActions}
          onClose={onClose}
          scrollKey={scrollKey}
          scrollableContent={scrollableContent}
        >
          {children}
        </PanelChrome>
      </div>

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.