Update README.md

submit: add official track:backyard + achievement:* tags (the judges' canonical format)

docs: make the safety disclaimer explicit (not a mobility aid)

docs: add Field Notes blog link + field-notes badge tag (8th badge)

docs: add the social post link (LinkedIn)

docs: add the demo video link (README + the app's Watch-the-demo button)

docs: claim best-agent with an explicit perception-action architecture section

fix submission tags: off-the-grid (was off-grid), add community-choice

docs: credit Claude Code (Claude Opus 4.8) as the coding agent

docs: plainer voice, drop AI writing tics and negation framing

docs: link the agent trace (Sharing is Caring) + clarify the inference log is separate

docs: lead with accessibility (designed blind-first)

docs: add live Space URL to README

fix: valid HF Space metadata (colorTo, short_description <=60)

Iris: hands-free live mode, money/bill reading, accessible UI, Qwen3-VL-2B

Iris: voice-first assistant for the blind (gr.Server + Qwen2.5-VL + Whisper + Piper)