feat: Update GA4 tracking (G-4M6KQ8KSY5) and analytics dashboard

feat: Update GA4 tracking (G-4M6KQ8KSY5) and analytics dashboard

feat: Update GA4 tracking (G-4M6KQ8KSY5) and analytics dashboard

feat: Update GA4 tracking (G-4M6KQ8KSY5) and dashboard

Fix openModal and saveSettings null element pointer exceptions for settings and AI analysis buttons

Fix missing JS functions changeTextSize toggleFavsView SHOWING_FAVS

Optimize README truncation size to stay below Gemini 3.6 Flash 1.5K TPM limit

Add automatic 429 rate limit fallback retry chain across models

Fix HF Space README metadata configuration

Direct update with gemini-3.6-flash model and SOP settings