feat(snapshot): square share images for every daily.dev surface - #6544

…ind it"

This reverts commit 3225ba5.

Placement 8 was a generic card, which said nothing about where the
control actually goes. It is now the floating bar from #6352 over a live
selection: copy link, copy text, quote, share, with Snapshot alongside
them.

Rebuilt rather than imported — #6352 is closed and SelectionShareBar
never reached main — so the chrome and control set match the PR while
the component itself stays out of this branch.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

The control section showed four Snapshot variants, two of which nothing
uses, and none of the link, share or selection-bar controls that carry
most of the placements. It now lists the six real ones, each naming the
surfaces it appears on so the set can be audited against the map rather
than trusted.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

A download is silent on most browsers, so pressing Snapshot looked like
it had done nothing. Success and failure now carry their semantic
variant, so the check and the alert read at a glance.

The placements page mounts the toast host and offers the three states,
because Storybook aliases the toast hook to a mock that logs to the
console — every toast in every story has been invisible. The page reaches
the real hook through the hooks barrel, which the alias does not cover.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Every target we share to takes a paste — Slack, WhatsApp, X, a composer.
A file in Downloads makes the sharer go find it first, so the clipboard
leads and the download stays as the fallback where ClipboardItem is
missing or refused.

The capture is handed over as a promise rather than awaited: Safari only
honours a clipboard write inside the task that handled the gesture, and
awaiting the rasterization first loses it.

Confirms with "Image copied", in the toast style the rest of the product
already uses.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

One rule across the placements: header rows and toolbars take the icon,
standalone calls to action keep the word. A header already states what it
is and often carries Follow or Join, so a labelled share button competes
with the thing the reader came for; a card whose whole purpose is the
share does not.

So the profile widgets, the profile header beside its icon-only edit
button, and every section header drop the label, and the selection bar's
Snapshot matches the tertiary icons beside it rather than standing out.
Post, thread, upvote, streak, DevCard and invite keep theirs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

A share control that differs from its neighbour reads as a bug rather
than a decision. The profile header's was Small and outlined next to a
Medium Float edit button; the tag, source and squad headers were
outlined next to Float Follow and Join buttons; the DevCard's sat beside
a Float Download.

Each placement now states the size and variant its neighbours use, and
the widget headers drop to Tertiary so an icon does not outweigh the text
links it sits between. Standalone controls in cards keep Secondary,
where there is nothing to match.

Also completes the selection-bar specimen, which was missing the very
control the page is about.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Each of the 20 surfaces from the sharing map now has three comparable
options — what ships today, the recommended placement, and the loudest
treatment worth testing — so placement can be argued across surfaces
rather than one at a time. The map itself moves to a shared module so
the two pages cannot drift.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Replaces the single abstract-mock page with one page per category, each
drawing the real screen — post page, happening now, briefing, profile,
status moments, feed cards, directory pages, invite — and every variation
of where its share control could sit, from today's overflow menu to the
loudest snapshot-primary treatment worth testing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>