Batch J follows the v0.4.3 validation pass. It closes the remaining Settings tab persistence gap after renderer recreation and prevents MCP settings from exposing sensitive command args/env/header values in visible UI or input values while preserving unchanged raw values on save.
Tested: cd desktop && bun run test -- --run src/stores/uiStore.test.ts src/__tests__/mcpSettings.test.tsx
Tested: cd desktop && bun run lint
Tested: bun run check:desktop
Not-tested: live Electron MCP settings smoke after restart; trace header revalidation is deferred because inspected trace files predate the header fix.
Confidence: high
Scope-risk: narrow
New desktop installs and settings payloads without an explicit theme now hydrate to the pure white workspace. The General settings selector keeps the other two themes available, but presents pure white first so the default and visible ordering agree.
Constraint: Existing persisted theme choices must continue to win over the default.
Rejected: Remove the warm classic theme | users still need the alternate light appearance.
Confidence: high
Scope-risk: narrow
Directive: Keep the localStorage and user-settings theme fallbacks aligned when changing desktop theme defaults.
Tested: cd desktop && bun run test src/stores/uiStore.test.ts src/stores/settingsStore.test.ts src/__tests__/generalSettings.test.tsx
Tested: cd desktop && bun run lint
Tested: bun run check:desktop
Tested: git diff --check
Not-tested: Full root bun run verify.
The pure white appearance option needed to avoid warm-theme leakage while preserving the existing warm classic brand theme. This adds the white theme mode, keeps local browser startup from reusing stale H5 server URLs in dev, and moves visible legacy warm surfaces onto theme tokens.
Constraint: H5 server auth policy, CORS policy, SDK routes, adapter routes, and IM access paths must not change for a visual theme fix
Rejected: Rename the original light theme to pure white | the original theme is a warm classic palette, not a neutral white workspace
Confidence: high
Scope-risk: moderate
Directive: Keep structural white-theme borders neutral; reserve the warm brand color for selected states, primary actions, and small accents
Tested: cd desktop && bun run test -- src/__tests__/generalSettings.test.tsx src/lib/desktopRuntime.test.ts src/lib/persistenceMigrations.test.ts src/stores/uiStore.test.ts src/stores/settingsStore.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Tested: bun test src/server/__tests__/settings.test.ts src/server/__tests__/h5-access-policy.test.ts src/server/__tests__/h5-access-auth.test.ts src/server/middleware/cors.test.ts
Tested: Browser smoke at http://127.0.0.1:5173 with data-theme=white, no H5 token prompt, /status inspector visible, inspector border #DDE3EA
Not-tested: Full bun run verify gate
