LOW: Add test coverage for bot, MCP server, research, and web routes

[Brad-Edwards]

Severity: Low (Quality I1)

Missing test coverage for:

• `src/bot/bot.ts` — no tests at all
• `src/mcp/server.ts` — no tests for MCP tools
• `src/analysis/research.ts` — no tests for session lifecycle
• `src/server/routes/*.tsx` — no tests for web routes
• `src/db/queries.ts` — searchItems, similarItems, getItem, addAnnotation untested
• `src/db/queries-web.ts` — no tests
• `src/jobs/*.ts` — no tests for job orchestration

Recommendation: Add tests following existing patterns in `tests/`.