[Improved, Fixed] Stability and job-sync reliability

Improvements

• Indeed job sync now maps employment types correctly, uses the full job description (with proper HTML), and validates salary ranges and contact emails so your postings display accurately on Indeed.

Fixes

• Prevented a rare error that hid the navigation bar when the jobs list failed to load.
• Eliminated null-pointer crashes in demo interviews when candidate data was missing.
• Removed unsupported emoji characters from job descriptions to stop Indeed posting failures.