Replace the AI Mode document tabs with detail blocks and header publish controls

[yattias]

The document pane's Document / Publish tabs become a strip of detail
blocks — Applying to, Funding goal, Authors, Cover image for a proposal;
Funding amount, Short description, Contacts, Cover image for an RFP —
each opening a popover with just its section of the form (or, for the
RFP picker, the existing modal). The strip shows as many blocks as the
pane is wide enough for, in a fixed order, and folds the rest into the
"All details" block, which opens the full form and says how many it
holds (hooks/useFittingCount). The workspace header gains the document's
title, a "N remaining" pill and a Publish button that stays disabled
until nothing required is missing; a published document shows a
Published pill and an Update button. The form now lives as long as the
note does, so switching views no longer rehydrates it from stale content.

Below the tablet breakpoint the drawer trades the strip for a
Document | Details switch, with the remaining count on Details and the
publish controls inline.

Supporting changes: completion.ts derives what is missing from the zod
schema without touching form errors; PublishStatusPill; PublishButton
gains requireComplete and reads Update for published works; the funding
section is split into FundingOpportunityField, FundingGoalField and a
FundingGoalSection with a shared useSelectedGrant; sections take a
className so they render bare in a popover; PublishingForm gains
showFooter; NotebookTabs loses its labels prop and the header its
"Esc to close" hint.

Verified with type-check, eslint and prettier only.

Stack

Part of turning the AI Mode overlay into a funding workspace (plan and mock decisions in the first PR's thread). Stacked on #1116; merge that first, then this one.

1. Wrapping AIMode and notebook with publishing provider #1116
2. Replace the AI Mode document tabs with detail blocks and header publish controls #1118
3. Share one chat session between the AI Mode overlay and the notebook panel #1117
4. Start a workspace conversation by saying whether you fund or need funding #1119
5. Lift the notebook's note listing into a hook and name a note's kind #1120
6. Break the AI Mode overlay into a shell, a sidebar and the panes #1121
7. Open documents in the workspace, with a chat on each that is kept once used #1122
8. Give phones a full-screen view of conversations and documents #1123
9. Workspace review fixes: one-line sidebar rows, no layout toggle, no notebook link #1124

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