Update README.md

[senamakel]

Summary

• What changed and why.
• Keep this to 3-6 bullets focused on user-visible or architecture-impacting changes.

Problem

• What issue or risk this PR addresses.
• Include context needed for reviewers to evaluate correctness quickly.

Solution

• How the implementation solves the problem.
• Note important design decisions and tradeoffs.

Submission Checklist

If a section does not apply to this change, mark the item as N/A with a one-line reason. Do not delete items.

• Tests added or updated (happy path + at least one failure / edge case) per Testing Strategy
• Diff coverage ≥ 80% — changed lines (Vitest + cargo-llvm-cov merged via diff-cover) meet the gate enforced by .github/workflows/coverage.yml. Run pnpm test:coverage and pnpm test:rust locally; PRs below 80% on changed lines will not merge.
• Coverage matrix updated — added/removed/renamed feature rows in docs/TEST-COVERAGE-MATRIX.md reflect this change (or N/A: behaviour-only change)
• All affected feature IDs from the matrix are listed in the PR description under ## Related
• No new external network dependencies introduced (mock backend used per Testing Strategy)
• Manual smoke checklist updated if this touches release-cut surfaces (docs/RELEASE-MANUAL-SMOKE.md)
• Linked issue closed via Closes #NNN in the ## Related section

Impact

• Runtime/platform impact (desktop/mobile/web/CLI), if any.
• Performance, security, migration, or compatibility implications.

Related

• Closes:
• Follow-up PR(s)/TODOs:

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AI Authored PR Metadata (required for Codex/Linear PRs)

Keep this section for AI-authored PRs. For human-only PRs, mark each field N/A.

Linear Issue

• Key:
• URL:

Commit & Branch

• Branch:
• Commit SHA:

Validation Run

• pnpm --filter openhuman-app format:check
• pnpm typecheck
• Focused tests:
• Rust fmt/check (if changed):
• Tauri fmt/check (if changed):

Validation Blocked

• command:
• error:
• impact:

Behavior Changes

• Intended behavior change:
• User-visible effect:

Parity Contract

• Legacy behavior preserved:
• Guard/fallback/dispatch parity checks:

Duplicate / Superseded PR Handling

• Duplicate PR(s):
• Canonical PR:
• Resolution (closed/superseded/updated):

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