Add Upload New Version button + revision upload form

[leotrs]

Summary

• Adds "Upload New Version" button to each published scroll on the dashboard, linking to /upload?revises={url_hash}
• Upload form shows a revision context box (title, current version, publish date, next version) when ?revises= is present
• Pre-fills all metadata fields from the existing scroll; file upload zone stays empty
• Header changes to "Upload New Version", submit button to "Preview New Version"
• Normal upload form (no ?revises=) is unchanged
• 9 unit tests covering dashboard button visibility, form prefill, revision context, invalid/unauthorized hashes, and normal mode

Test plan

• Unit tests pass locally (9/9)
• CI validates full test suite
• E2E tests validate dashboard and upload flow in CI

🤖 Generated with Claude Code

[github-actions]

Deploy Preview

https://scroll-press-pr-41.fly.dev

This preview will be destroyed when the PR is closed.

[leotrs]

Needs human review

What changed: Added "Upload New Version" button to published scrolls on the dashboard and a revision-mode upload form that shows context about the scroll being updated, pre-fills metadata, and relabels the header/submit button.

Review checklist:

1. Open the deploy preview: https://scroll-press-pr-41.fly.dev
2. Log in and navigate to the dashboard
3. Verify each published scroll card shows an "Upload New Version" button at the bottom
4. Confirm draft/preview scrolls do NOT show the button
5. Click "Upload New Version" on any published scroll
6. Verify the upload form shows:
   • Header says "Upload New Version" (not "Upload New Scroll")
   • A revision context box showing the scroll title, current version, publish date, and "This will become vN"
   • All metadata fields (title, authors, abstract, keywords, subject) pre-filled from the existing scroll
   • File upload zone is empty (not pre-filled)
   • Submit button says "Preview New Version" (not "Preview Scroll")
7. Navigate to /upload (no ?revises= param) and confirm the normal upload form is unchanged
8. Try /upload?revises=invalidhash and confirm it falls back to normal upload mode

What to look for:

• Revision context box styling: left accent border, readable typography, correct version numbers
• Dashboard button alignment and spacing on both desktop and mobile
• The scroll card wrapper doesn't break existing card styling (borders, border-radius)
• Mobile: "Upload New Version" button should be full-width and centered
• Pre-filled metadata accuracy matches the original scroll exactly

[leotrs]

there's a problem in the dashboard: I see one card per version, I should see one card per scroll

[leotrs]

Needs human review

What changed: Adds an "Upload New Version" button to each published scroll card on the dashboard, and a revision-aware upload form that shows a context box (current title, version, next version) and pre-fills metadata from the existing scroll.

Review checklist:

1. Log in and navigate to the dashboard (/dashboard)
2. Verify each published scroll card has an "Upload New Version" button in the bottom-right action bar
3. If you have a scroll with multiple versions, confirm only the latest version appears (no duplicates)
4. Click "Upload New Version" on any scroll — verify you land on /upload?revises={hash}
5. Check the revision context box appears at the top: "Updating:" label, scroll title, current version, "This will become vN"
6. Confirm all metadata fields (title, authors, abstract, keywords, subject) are pre-filled from the existing scroll
7. Confirm the file upload zone is empty (not pre-filled)
8. Verify the header reads "Upload New Version" and submit button reads "Preview New Version"
9. Visit /upload directly (no ?revises= param) — confirm normal form is unchanged: "Upload New Scroll" header, "Preview Scroll" button, no revision context box
10. Try /upload?revises=invalidhash — should fall back to normal upload form gracefully

What to look for:

• Upload New Version button alignment and spacing within the card wrapper on desktop and mobile
• Revision context box: left red border accent, proper typography hierarchy, readable version info
• Mobile responsiveness: button should go full-width on small screens, context box should not overflow
• No visual regression on the existing scroll cards (the new wrapper div shouldn't change card appearance)
• Confirm the scroll-card-wrapper border doesn't double up with the existing card border

🤖 Generated with Claude Code