feat(signs): Phase D — Signs view, corpus analytics, anchored sign cross-references

[tbitcs]

Phase D — Signs, Corpus Analytics, and Anchored Sign Cross-References

Backend

• Signs API (�ackend/glossa_lab/api/signs.py): Three endpoints mounted at /api/v1/signs:
  • GET /signs — paginated, filterable sign list (deciphered, confidence, in_corpus, search)
  • GET /signs/summary — aggregate counts (total, deciphered, undeciphered, HIGH/MEDIUM/LOW, in_corpus)
  • GET /signs/{sign_id} — full detail with cross-references
• In-memory sign index built lazily from INDUS_FINAL_ANCHORS.json (605 signs), anchor_sets DB table, and staging files
• Router registered in main.py
• Seed script (�ackend/scripts/seed_canonical_signs.py): Populates canonical_signs table from all anchor sources using sqlite3

Frontend

• SignsView (rontend/src/components/SignsView.tsx):
  • Header with summary stats (deciphered / undeciphered / known / in corpus)
  • Filter bar with confidence multi-select chips, search, in_corpus toggle
  • Two-column responsive grid of sign cards with SVG glyph placeholders (deterministic color based on sign_id hash)
  • Each card shows reading, confidence chip, corpus freq, cross-references (phase, DEDR, experiment), action buttons
  • Slide-over detail panel on click
  • Pagination
  • Tab bar switching between Signs Index and Corpus Analytics
• CorpusAnalyticsPanel (rontend/src/components/CorpusAnalyticsPanel.tsx):
  • World corpus catalogue table with language family, script type, tokens, reading direction
  • Overlap percentage heatmap bars
  • Contact Score placeholder column
  • Language family and script type filters
• Navigation: Signs tab now renders SignsView (was SignDictionary), "View all signs →" button on Dashboard after DeciphermentPanel
• API types: SignEntry, SignsSummary, SignsListResponse added to api.ts

Validation

px tsc -b --noEmit — 0 errors

px vite build — passes (232 modules, 1.99s)

• Seed script finds 605 signs from INDUS_FINAL_ANCHORS.json (DB seeding runs at app startup)

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Conversation: https://app.warp.dev/conversation/e3fbaec2-4a0b-454f-9c90-8d6c6289f60a
Run: https://oz.warp.dev/runs/019e84ec-7a7d-76c2-8174-7284911f65ae

This PR was generated with Oz.