Feat: WooCommerce orders open on new window

[mgiannopoulos24]

Closes #721.

The problem

Clicking an order in the WooCommerce Orders window navigated the list away, so the only route back was closing the window and reopening it from the dock.

Why

The bridge routes an admin link by comparing deriveWindowId( url ) against the source window's slug: same slug navigates the iframe in place, a different slug opens its own window. WooCommerce's High-Performance Order Storage moves the order editor off post.php?post=N&action=edit — where post has always been identity-bearing — onto admin.php?page=wc-orders&action=edit&id=N, which derives the Orders list's slug. The click read as in-page navigation.

id can't simply join the identity set: plugin list screens use admin.php?page=foo&action=…&id=N for row actions, and those must keep the list's slug so they run in place and land back on the list.

The fix

A scoped pass in src/utils.ts (scopedIdentityParams), keyed on the URL shape rather than on wc-orders:

• admin.php + a page + action=edit + id=N → id is identity-bearing.
• admin.php + a page + action=new → action is identity-bearing (the blank editor — Add order had the same problem, and the admin bar's + New → Order already spawned its own window).
• Every other action= stays transient, so row actions still run in place.

An order now opens beside the Orders list, two orders are two windows, and closing one leaves the list where it was. Any plugin routing a feature through one admin.php?page= file gets the same behaviour.

Screenshot

Testing

• 6 new tests: 4 in tests/vitest/utils.test.ts for the identity rule and its scoping, 2 in src/window/iframe-bridge.test.ts running the real slugifier through the dispatcher (order link → new window, order row action → in place).
• npm run test:js (5355 passing), npm run lint, npm run typecheck, npm run build all clean. No PHP touched.

Docs

docs/bridge-protocol.md (the same-slug / cross-slug dispatch rules) and docs/javascript-reference.md (deriveWindowId, a Stable public API).

[AllTerrainDeveloper]

LGTM! Thank you!