- CRITICAL: Fix command injection in discoveryService (execFile instead of exec, path validation regex) - CRITICAL: Add Zod validation on discover API endpoint - HIGH: Add Zod validation on discover/approve endpoint - HIGH: Add array length limits to import schema (1000/100/100) - HIGH: Fix theme broadcast echo loop (setTimeout vs queueMicrotask) - MEDIUM: Singleton BroadcastChannel instead of create-per-send - MEDIUM: Exclude sensitive APIs from service worker cache - MEDIUM: Fix TypeScript cast errors in exportService tests
Fix all build/type/lint errors, write 46 new tests (222 total across 20 files), regenerate Prisma client, update seed with user preferences. Fix SvelteSet usage, add {#each} keys, clean unused imports.