T-119: TestCatalogPage with search, filters (source/platform/severity), template cards grid, and pagination
T-120: TestFromTemplateForm modal with pre-filled fields from template, required field validation, and redirect on creation
T-121: Integrate Available Test Templates section in TechniqueDetailPage with Run This Test buttons; fix missing testStateBadgeColors for new states
Also: add backend entrypoint.sh for automatic Alembic migrations + seed on container startup, add curl to Dockerfile for healthcheck
Implement all main frontend views for the MITRE ATT&CK coverage platform:
- T-026: Dashboard with coverage summary cards and tactic breakdown table
- T-027: Interactive ATT&CK matrix with filtering by status, tactic, platform
- T-028: Technique detail page with tests, intel items, and review actions
- T-029: Test creation form with technique selector and validation
- T-030: Test detail page with drag and drop evidence upload and download
- T-031: System admin panel with MITRE sync and intel scan controls
New components: CoverageSummaryCard, TacticCoverageChart, AttackMatrix, TechniqueCell, TestForm, EvidenceUpload, EvidenceList
New API modules: metrics.ts, techniques.ts, tests.ts, evidence.ts, system.ts
All views use TanStack Query for data fetching with proper loading and error states. Role-based UI controls for admin/lead actions.
