fix(in-page-channel): connect panels nested in popup windows

[SaKaNa-Y]

Problem

The A11y Inspector shows "No page connected" when its panel is rendered in a popup, even though it connects in the embedded dock. The panel iframe has no opener of its own; the popup's opener is the inspected page.

Fix

Include each ancestor window's opener in the default in-page channel handshake targets, deduplicating targets and continuing past inaccessible openers. Existing origin checks remain in place. Update the API comments and add handshake/RPC regression coverage for a direct popup and one or two nested panel frames.

Verification

• Regression tests failed for nested popup frames before the fix and pass afterward.
• pnpm lint, pnpm knip, pnpm typecheck, and pnpm build passed.
• pnpm test --run: 135 test files passed; 1,521 tests passed and 9 skipped.
• Browser: reproduced the failure in Vite DevTools and the Devframe Hub Vite example. With the rebuilt panel, the Hub example's popup connects to the inspected page, displays accessibility results, and supports rescanning. The updated dependency has not yet been retested in Vite DevTools.

[coldtea-pr-lens]

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🟢 +0 new · 🟠 ~1 changed · 🔴 -0 removed · 1 flow · 7 files · commit 2ff546b

Architecture

1 component touched across 2 lanes.

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Data flow

Popup panel handshake discovery

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1 Skipped Deployment

Project	Deployment	Actions	Updated
devframe	Skipped		Sep 13, 2026 2:32am UTC