feat(inspect): copy settings summary in the full inspector

The legacy metadata page's COPY ALL (LI-4) becomes "Copy settings summary"
after the six facts of the shared full inspector, so the Images viewer,
the recorded history's current file and Inspect all offer it; the Images
side panel keeps the concept's footer. The text is the legacy copyAllData
template with its placeholders, filled from what the inspector shows. A
unit test runs the template read from web/metadata.html on the legacy
parse of every parity PNG: 22 of 25 are byte-equal, and the other three
differ only by the ZeroOut guard (#249) or facts the legacy parse missed.

Copying follows the concept's prompt copy: the toast "Settings summary
copied.", or the select-to-copy dialog (now titled per copy) without a
clipboard. The concept comparisons map the button as D-NEW-1.

web/js/workspace/workspace.css

@@ -212,6 +212,8 @@ main:focus-visible { outline: 2px solid var(--ca-focus); outline-offset: 4px; }
 /* #249 D20: the viewer details' pair send and history buttons wrap inside the narrow rail at 200% zoom with wider fonts,
    where the toolkit's `nowrap` would push them past its edge. */
 .ca-tools #viewer-details > button { white-space: normal; /* D20 */ }
+/* LI-4: "Copy settings summary" after the facts wraps the same way in the narrow rail. */
+.ca-tools #viewer-details > div > button { white-space: normal; /* D-NEW-1 */ }
 /* The Images page narrows to one column inside a narrow container (the Library-embedded gallery). */
 .images-main { container: images-page / inline-size; }
 @container images-page (inline-size < 600px) {