feat: Grant Data Quality Score (#166)

[ifygreg01-best]

Summary

Implements issue #166 — a system that evaluates whether grant records contain the essential information needed by users.

Changes

frontend/src/types/grant.ts

• Extended GrantRecord with 8 optional enrichment fields (description, website, contactEmail, category, amount, currency, recipientName, recipientAddress, updatedAt)
• Added QualityGrade (A/B/C/D/F), QualityField, and GrantQualityScore types
• Added ExportRequester / ExportRole types (already imported by grant-export.ts)

frontend/src/lib/grant-quality.ts (new)

• QUALITY_FIELD_WEIGHTS — 11 fields with weights summing to exactly 100
• scoreGrantQuality(grant) — returns 0–100 score, letter grade, present/missing field lists
• scoreToGrade(score) — A (≥90), B (≥75), C (≥60), D (≥40), F (<40)
• scoreAllGrants(grants) — scores and sorts worst-first
• listLowQualityGrants(grants, threshold=75) — admin filter helper
• formatQualitySummary() / formatQualityLabel() — display utilities

frontend/src/lib/grant-quality.test.ts (new)

• 62 tests: weight table integrity, grade thresholds, field presence edge cases, full/minimal/partial/empty scoring, admin utilities, sort order, threshold filtering

frontend/src/components/AdminGrantQualityPanel.tsx (new)

• Summary stats (total, complete, needs attention, average score)
• Sortable list (worst-first / best-first / alphabetical)
• Filter toggle for low-quality records only
• Per-row expandable missing-field detail
• Colour-coded grade badges + score progress bars
• Fully accessible (aria-expanded, aria-live, role=progressbar, aria-label)

Acceptance Criteria

• ✅ Required information fields are defined (11 weighted fields in QUALITY_FIELD_WEIGHTS)
• ✅ Incomplete grants receive a lower quality score (proportional to missing fields)
• ✅ Administrators can identify records that need improvement (listLowQualityGrants() + AdminGrantQualityPanel)

Tests

All 62 new tests pass. All pre-existing tests unaffected (grant-export: 18/18, grant-import: 22/22).