Docs: describe the New Window source in our own words

The New Window line in docs/target-app-parity.md quoted the help page word for word. It now describes what the page says and keeps the link.

docs/target-app-parity.md

@@ -543,7 +543,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 - **Window › Arrange › Float in Window, Float All in Windows and Cascade (G7):** documents float in windows of their own, out of the tab strip ([public source](https://helpx.adobe.com/illustrator/using/customizing-workspace.html): "drag the window's tab out of the group"). Float in Window (`window.arrange.floatInWindow`) floats the current document, Float All in Windows (`window.arrange.floatAllInWindows`) every tabbed one, and Cascade (`window.arrange.cascade`) floats every document and stacks the windows from the upper left to the lower right ([public source](https://helpx.adobe.com/illustrator/using/viewing-artwork.html): "Cascade displays windows stacked and descending from the upper-left to the lower-right of the screen"). On the desktop each window is an OS window; on the web and on Wayland it is a window inside the app's window. The window of the current document holds the canvas; the others draw their documents as Tile's panes do, and a press in one makes its document the current one. Closing a window closes its document, asking to save unsaved changes. Consolidate All Windows brings every document back under the tabs, and Tile brings them back into its grid. The cascade's 30 pt step, the windows' size and when the items are enabled (Cascade with two documents or more, Float in Window for a tabbed current document, Float All in Windows while a document is tabbed, Consolidate All Windows while documents are tiled or floating) are VectorCraft's own. Tests: `crates/ui-egui/src/doc_windows/tests.rs`.
 - **Dragging a document tab out and a document window back (G7):** a document tab dragged more than 24 pt above or below the tab strip floats its document in a window under the pointer, and a document window dragged onto the tab strip goes back under the tabs ([public source](https://helpx.adobe.com/illustrator/using/customizing-workspace.html): "To undock (float or untab) a Document window from a group of windows, drag the window’s tab out of the group. To dock a Document window to a separate group of Document windows, drag the window into the group."). A window inside the app's window is dragged by its title bar; an OS window by the document's tab at its top, and the window follows the pointer. The 24 pt distance and the tab at the top of an OS window are VectorCraft's own. Tests: `crates/ui-egui/src/doc_windows/tests.rs`.
 - **Preferences › User Interface › Open Documents As Tabs (G7, #394):** checked by default, documents open under tabs in one document window ([public source](https://helpx.adobe.com/illustrator/desktop/get-started/learn-the-basics/workspace-overview.html): "When you create or open documents, they are arranged in tabs in a single document window"). With the box cleared, each document opened or created afterwards opens in a floating window of its own, at the next cascade place, as Float in Window floats it; documents already open stay where they are, and checking the box again leaves floating documents in their windows. Tests: `crates/ui-egui/src/doc_windows/tests.rs`.
-- **Window › New Window (G7, #4116):** New Window (`window.newWindow`) opens another view of the current document ([public source](https://helpx.adobe.com/illustrator/using/viewing-artwork.html): "You can open multiple windows of a single document at the same time."), with its own zoom, center, rotation, artboard and Outline or Preview, as a tab of its own; an edit in one view shows in every view. Tile, Cascade, Float in Window, Float All in Windows and Consolidate All Windows arrange each view as they arrange a document, and Next and Previous Document step through the views. Closing a view leaves the document open; closing its last view closes the document, asking to save it first. The view's number after the name in its tab ("Name:2", while the document has more than one view) is VectorCraft's own. Tests: `crates/ui-egui/src/doc_windows/tests.rs`.
+- **Window › New Window (G7, #4116):** New Window (`window.newWindow`) opens another view of the current document ([public source](https://helpx.adobe.com/illustrator/using/viewing-artwork.html) describes showing one document in several windows at once), with its own zoom, center, rotation, artboard and Outline or Preview, as a tab of its own; an edit in one view shows in every view. Tile, Cascade, Float in Window, Float All in Windows and Consolidate All Windows arrange each view as they arrange a document, and Next and Previous Document step through the views. Closing a view leaves the document open; closing its last view closes the document, asking to save it first. The view's number after the name in its tab ("Name:2", while the document has more than one view) is VectorCraft's own. Tests: `crates/ui-egui/src/doc_windows/tests.rs`.
 
 - **Document Setup modal handoff:** Document Setup → Edit Artboards applies valid settings, closes the dialog and activates the Artboard tool. Pointer-click tests cover successful handoff, invalid settings, OK, Cancel and Undo in `dialogs/document_setup.rs`.
 - **Control bar with the Artboard tool:** while the Artboard tool is in use, the Control bar shows the active artboard's controls in place of the object controls: Preset, Portrait and Landscape, New Artboard, Delete Artboard, the Name field, Artboard Options, Rearrange All Artboards, the Transform link, Move and Scale Artwork with Artboard and, while the bar has room, the reference point with X and Y, and W and H with the Constrain Width and Height Proportions link. Each runs the command its Properties or Transform panel counterpart runs (`artboard.setProps`, `artboard.new`, `artboard.delete`, `tool.options {tool: "artboard"}`), and the reference point is the one the Transform panel uses. In an 800-point window the controls up to the Transform link fit, Move and Scale Artwork with Artboard show as their boxes alone with their names in tooltips, and the link opens the Transform panel with the artboard's position and size. Pointer and key tests in `panels/artboards.rs` cover the controls, W about the reference point, the orientation and the name. Public reference: [Using multiple artboards](https://web.archive.org/web/20210925094818/https://helpx.adobe.com/illustrator/using/using-multiple-artboards.html) (archived copy).