fix(ci): resolve baseline failures blocking PRs

[HexaField]

Summary

• fix the baseline client/server TypeScript issues reproduced from the current CI workflow
• make workspace/dashboard/chat code paths type-safe again without reintroducing removed behavior
• allow server/test startup in CI environments where node-pty native bindings are unavailable until terminal sessions are actually used
• align package test scripts so workspaces with zero tests do not fail the root test command immediately

What changed

• added specs/ci-baseline-fix.md before implementation
• fixed WorkspaceView.tsx stale tab/type narrowing errors and related client type issues surfaced by pnpm run check
• cleaned up stale/unused imports, values, and test fixtures that were breaking strict TS checks
• restored/exported getLastMessages for dashboard coverage and fixed OrgSummary test data
• changed server bootstrap env fallback handling for empty gateway URL/token values
• lazy-loaded node-pty inside the terminal manager so app startup does not crash in CI when the native module is unavailable
• updated packages/core and packages/server test scripts to vitest run --passWithNoTests

Verification

• pnpm run check ✅
• pnpm run certs && pnpm run build ✅
• pnpm run test progressed past the previous immediate no-tests failure, but local Playwright remains blocked by a separate EADDRINUSE ::1:5899 webserver/runtime issue

Scope

This PR is intentionally limited to CI/CD baseline failures and related startup/check fixes.

[HexaField]

Duplicate of #6 — already merged.