…cks UI

Wires the frontend for the new track-based prize flow:

- New TracksSettingsTab with full CRUD: name/slug/description/eligibility/
  prompt/customQuestions/requiredArtifacts; per-row bulk-opt-in action with
  confirmation dialog for retrofitting existing submissions
- RewardsTab gains a 3-card prize structure picker, per-tier kind toggle and
  track dropdown, amber "tracks unbound" banner, and an inline Manage Tracks
  dialog embedding the settings table
- SubmissionForm: track picker + per-track answers (prompt / custom
  questions / required artifacts), tagline, builtWith chips, screenshots,
  license, code attestation, with soft compliance gate for already-submitted
  submissions. trackIds hydrate from trackEntries on edit so bulk-opted-in
  submitters don't strip themselves out
- SubmissionDetailModal renders tagline, screenshots, built-with, license
  badge, and per-track answers
- Public hackathon page: Overview splits prizes into Overall/Track sections;
  sidebar tier list shows TRACK prefix and looks up track names; Winners tab
  gets a Track Winners section with per-track cards
- API client: lib/api/hackathons/tracks.ts with listTracks /
  listOrganizerTracks / createTrack / updateTrack / deleteTrack /
  bulkOptInAllSubmissions, plus types for HackathonTrack,
  TrackCustomQuestion, TrackRequiredArtifact, TrackAnswer,
  SubmissionTrackEntry, BulkOptInResult
- Hackathon provider/hooks expose trackWinners and per-track entries

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

- Add max constraints that previously only existed on the backend DTO so
  validation fires inline (projectName 100, description 5000, URL 500).
- ApiErrorField gains an optional `debug` field that the backend Prisma
  filter populates outside production.
- useSubmission's error formatter prefers `debug` over the generic field
  message when present, so toasts show the real Prisma reason behind
  "Data validation failed" instead of a blank "validation: …" line.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…re-render

The submit page mapped `initialData` inline on every render, which (a)
recreated the object reference on every render so the form's reset
effect fired continuously and wiped values the user was typing, and (b)
dropped the Phase A fields entirely (tagline, builtWith, screenshots,
license, codeAttestedAt) plus trackEntries. The combined effect was the
documented symptom — only logo and videoUrl survived the save because
those round-tripped through the type-narrowed object literal, while
tagline / builtWith / license kept appearing to "switch to empty".

- Memoize `initialData` against `mySubmission` so the reference only
  changes when the underlying submission actually changes.
- Pass through Phase A fields and trackEntries so the form can hydrate
  the saved values, and so a follow-up save doesn't write back empties.
- Widen SubmissionFormContent's `initialData` prop to accept the raw
  server-side extras (trackEntries, codeAttestedAt) that the form
  already consumes via cast — keeps the parent's hydration explicit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…ults (#570)

Pairs with boundless-nestjs feat(judging) organizer dashboard upgrades.
Adds three new components to the organizer judging page; no changes to
existing components, judges, or scoring flows.

- `CoverageMatrix` — heatmap on the Overview tab. Rows are
  submissions, columns are judges. Surfaces idle judges (mostly-empty
  columns) and orphan submissions (rows with 0-1 scores) at a glance —
  both block a defensible publish.

- `AllocationPreviewCard` — sits above the Publish button on the
  Results tab. Read-only allocator dry-run showing overall placements
  + per-track winners exactly as publish-results would commit. Calls
  out EXCLUSIVE stacking effects (track leader losing to overall),
  plus surfaces publish gates (deadline, completeness, partner
  allocation) so the organizer sees blockers without attempting to
  publish.

- `TrackResultsSection` — per-track collapsible standings on the
  Results tab. Each section is scoped to a track's opt-ins, sorted by
  averageScore, with the bound prize tier shown as a chip. The leader
  is highlighted as the current pick — soft preview only; the
  Allocation Preview above shows the authoritative EXCLUSIVE-stacked
  outcome.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>