[jm-rivera]

Fixes eight defects in website #90, #91, #92 and #94 before they ship to production with the release.

Changes

• Activity and chat turns: messageTurns in src/lib/studio/activityView.ts numbers each message by turn, aligning the last prompt with the last Activity entry, and counts from 1 when the transcript holds more prompts than that entry's turn. ChatPanel.tsx reads that one numbering for plans, turnWidgets, ChatMessage and the feedback id, so a fork of a card or canvas share shows each reply's own cards and plan. The saved shape is unchanged, so forks already saved read correctly.
• More Info: the Sources block renders whenever view.from is set, so a computed card with no credited source keeps "Computed by the Development Finance Observatory." (CardInfoPanel.tsx). sidesOf in descriptionBlocks.ts labels each dividing step from its own inputs, and calculationOf returns a calculation only for a card with exactly one dividing step.
• Cite link: citeLinkOnce in src/lib/studio/infoPanel.ts settles a snapshot that cannot be built or saved as a failed link, logs Studio: a cite link could not be made, and lets the reader ask again.
• Card drag: LivePlaceholder's title and skeleton bones are drag handles, and a press on TextCard's bare textInner (data-card-frame) drags while its title and body stay content (cardPress.ts), with the grab cursor over the gaps (Whiteboard.module.scss).
• About this answer: maybeOneVariable in src/lib/search/view.ts returns true while served_count is null, so the members list is read when the panel opens and a one-variable answer names its variable.
• Download dialog: longLayoutSuffix in src/lib/search/downloadOptions.ts classifies each enrichment once, as a label, a kind (party_kind, party_class, party_whole) or neither, and both the extra columns list and the in-file note read it. A served in_long_layout flag decides; without it, long_layout_defaults decides through {column}_label and {column}_kind, so a role whose kind column is in the file no longer offers Party kind as an extra. inFileNote states kinds per role, with each role's examples taken from what dfo-apis writes.

Notes for reviewers

• dfo-apis at 6ac6d475f does not serve in_long_layout, so production uses the long_layout_defaults path.
• fix(data): scroll a Change's menu into view before it opens #96 fixes the Change menu that opens off screen, so this PR leaves SlotMenu.tsx alone.
• While served_count is null, opening About this answer reads the members list for any family size, as the panel did before feat(data): tidy the unit picker, About this answer and download dialog #90.
• In a forked conversation, a feedback rating saved under the old turn numbering can show on a different reply.
• motion-kit/render.tsx still renders boardStyles.handle, which feat(studio): credit sources on cards and redraw the More Info panel #91 removed; the motion-kit films are left for their own change.

Testing: pnpm lint, pnpm lint:css, pnpm typecheck, pnpm build and pnpm build:migrate-shares pass. pnpm test runs 2,223 tests; 2,193 pass and the 30 that need a local Postgres fail on authentication, as on dev. New tests for turn numbering, two dividing steps, text-card presses, unsettled membership, the in-file classifier, per-role kinds and a failed cite link each fail without the change.