Add real-time emotion monitor to web GUI

Disable idle signal to prevent unwanted emotion calls

Add clear user instructions in terminal and landing page

Revert to default port, mention both 7860 and 7861 everywhere

Use dedicated port 7870 for the app

Add clear startup message with correct URL

Improve landing page, fix app URL to 7861, add English language instruction

Add PAD-based emotion system with muted speech output

Initial commit