fix: normalize STT when mic hears "dear" instead of Tia

feat: persist per-language code and selected language across reload

fix: sync Tia orb animation with actual TTS audio playback

feat: interview room reload resilience and store sync

phase update logic improved

cotent fix

added another resouce

blocking cards removed

feat: Deepgram Aura 2 TTS for interview room

docs: mark custom domain and smoke test as done in todo

fix: update domain from techinview.ai to techinview.dev everywhere

perf: cache problem queries for faster /practice pages

feat: add RelatedProblems & ProblemCard to blog, fix code block background

seo optimised

feat: add public /practice pages for programmatic SEO