docs(demo): one-command self-healing demo + heal.gif hero

[Desperado]

The launch asset (QUA-1005): a real, reproducible self-healing demo + the hero GIF.

What

• demo/site/index.html — a tiny local login page whose button reads "Sign in".
• demo/login.spec.js — ships deliberately broken: text='Sign In' (exact, case-sensitive) no longer matches.
• demo/heal.sh — one command: serves the page, runs 9l heal login.spec.js, you watch it heal.
• demo/heal.gif — the recorded run, embedded as the README hero (77 KB).
• demo/record.sh — regenerates the GIF via asciinema + agg.

The GIF is a genuine heal, not a mockup

Recorded from an actual 9l heal run:

$ 9l heal login.spec.js
🐾 run 1/3 → failure: locator_not_found (text='Sign In') → tier1_auto
  tier1_auto: Replaced 'text='Sign In'' with 'text='Sign in'' (confidence 85%)
🐾 run 2/3 → healed! (+1 / -1)
   -  await page.locator("text='Sign In'").click();
   +  await page.locator("text='Sign in'").click();
🐾 applied. Your test came back to life.

Fully offline (Tier 1) — no API key, reproducible by anyone with pip install 9lives + Node.

Notes

• .9lives/ run artifacts are gitignored; no node_modules/results leak into the commit.
• Doc-only — no package/version change.

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[sigilix]

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