v2.0.0

• Toolchain modernization — replaced --experimental-strip-types with the stable --strip-types flag across all scripts and npm run commands. eslint.config.mjs migrated to eslint.config.ts; vite.config.mjs migrated to vite.config.ts; bin/install-guard.js migrated to bin/install-guard.ts. All build scripts (build-client-assets, sync-module-analyzer, magicmirror-module-sandbox) now run under tsx. Added .prettierignore.
• TypeScript configuration restructure — added client/tsconfig.json and aligned client/tsconfig.runtime.json for the client build surface; added tests/tsconfig.testfiles.json and tsconfig.config.json for test and config roots. Removed tsconfig.client-runtime.json. Tightened path references in tsconfig.json and tsconfig.node.json.
• Sidebar toggle — clicking the active sidebar tab now closes the sidebar panel; clicking any tab while the sidebar is closed opens it. Toggle state is handled through .harness-sidebar-tab events without extra state management.
• Domain navigation dropdown — the topbar now exposes a domain navigation dropdown that opens on click, closes on outside click or selection, and reflects the active domain label. Replaces the previous always-visible tab row for switching sidebar areas.
• CSS fix: sidebar panel scroll — .harness-sidebar was missing min-height: 0, which caused the flex item to grow to full content height (overflowing its CSS grid row) and disabled overflow-y: auto on .harness-sidebar-scroll. Fixed with min-height: 0.
• Fix: SANDBOX_VERSION path resolution from installed package — the SANDBOX_VERSION IIFE now detects when running from a dist/server/ context and resolves ../../package.json instead of ../package.json, so the version string is correctly read in consumer installs.
• Fix: e2e build environment isolation — buildCurrentRepo in tests/e2e/helpers.ts now strips NODE_ENV, VITEST, VITEST_POOL_ID, and VITEST_WORKER_ID before spawning the build subprocess. This prevents @preact/preset-vite's CJS variant from loading zimmerframe via require() (ESM-only package) under rolldown optimizeDeps when the test environment is active.
• jiti devDependency — added jiti@^2.6.1 to support ESLint 10+ loading TypeScript config files (eslint.config.ts).
• Journey coverage expanded — added 6 new journey IDs (ui-domain-nav-dropdown-opens, ui-domain-nav-dropdown-closes-on-outside-click, ui-domain-nav-trigger-reflects-active-domain, ui-domain-nav-dropdown-closes-on-selection, ui-sidebar-toggle-opens, ui-sidebar-toggle-closes). Total journey coverage catalog: 15 → 21 entries.
• Test suite hardening — expanded startup-scripts, shell-hydration-parity, and runtime-core-contracts unit tests; fixed pageClick browser command to use el.click() via evaluate to bypass Playwright coordinate routing intercepted by a positioned footer element.
• Dependabot configuration updated — bumped and regrouped update schedule entries.

Full Changelog: v1.3.0...v2.0.0