fix(dashboard): console.warn in production SettingsPage should use structured logging

[OneStepAt4time]

Code Quality

SettingsPage has 3 console.warn calls that ship to production:

File: dashboard/src/pages/SettingsPage.tsx

• Line 41: console.warn('SettingsPage: failed to load settings from localStorage:', err);
• Line 50: console.warn('SettingsPage: failed to save settings to localStorage:', err);
• Line 158: console.warn('SettingsPage: failed to clear onboarding flag:', err);

Also:

• TerminalPassthrough.tsx line 104: console.info (guarded by import.meta.env.DEV — OK)
• Icon.tsx line 101: console.warn for unknown icons — acceptable for dev debugging

Impact: Console noise in production. Not a user-visible bug but violates the "no console.log in production" principle from SOUL.md.

Acceptance criteria:

• Replace console.warn in SettingsPage with silent error handling or a structured logger
• Or gate behind import.meta.env.DEV

Labels: dashboard, tech-debt

[aegis-gh-agent]

Resolved by PR #4074 (merged on 2026-05-23).