v0.1 release polish: Demo section + dual-edition docs

[dadachi]

Summary

Three doc updates reflecting what this session validated end-to-end:

README.md Demo section

Replaced the "coming after hackathon wrap" placeholder with the validated story:

• Three demo specs across both adapt + replace paths, all four validation layers green
• Real iPhone 17 simulator + Android emulator captures committed to docs/images/
• Layer 2 in build mode — real xcodebuild build and ./gradlew assembleDebug
• Layer 3 via Opus 4.7 vision judge with median-of-3 sampling per criterion

Spec	Domain entity (post-rename)	Path	Result
"a walk-in clinic queue for small veterinary practices"	ItemTag → Patient etc.	adapt	Layer 1 3/3 · Layer 2 3/3 · Layer 3 2/2 · Reviewer PASS
"a restaurant waitlist for casual dining"	Shop → Restaurant etc.	adapt	Layer 1 3/3 · Layer 2 3/3 · Layer 3 2/2 · Reviewer PASS
"a personal task tracker with due dates"	ItemTag → Todo (replaces queue entry)	replace	Layer 1 3/3 · Layer 2 3/3 · Layer 3 2/2 · Reviewer PASS

CLAUDE.md substrate section

Removed the "MIT-licensed free edition only — never reach into the paid repos" guardrail. That was a hackathon-week scope rule; reality is the agent's same code path handles both editions. Documented which repos the env vars target for free vs paid, and noted that paid-only concepts (Account, Member, Invitation) aren't in the rename plan and survive the generation intact.

ROADMAP.md Track 2 — Hosted

Updated the paid-edition path bullet from theoretical to "validated end-to-end during v0.1 development." The Track-2-hosted product surface is mechanically ready; what remains is the chat interface + infra, not agent core changes.

Test plan

• npm run ci — 19/19 green. No source changes.
• Docs render correctly (verified locally).

Out of scope

• Tag v0.1.0 — done after this PR merges, pointing at the merge commit. Separate step.

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