Add full-repo technical audit report with verified issues, risk ranking, and optimization roadmap

[Copilot]

This PR delivers a complete repository-level engineering audit and documents concrete, code-verified issues and optimizations across app flows, shared components, hooks, config, and contract integration paths. The output is a single detailed markdown report intended to guide prioritized remediation.

• Audit deliverable

  • Added REPO_AUDIT_REPORT.md at repo root with:
    • end-to-end flow analysis (/, /create, /capsules, /packet/[id])
    • prioritized findings by severity (Critical/High/Medium/Low)
    • security, reliability, and scalability risks backed by file-level evidence
    • an actionable optimization roadmap (priority-ordered)

• Key findings captured in report

  • message confidentiality mismatch (Base64 obfuscation vs true encryption expectations)
  • red-packet link fallback can produce invalid non-numeric IDs
  • type/lint quality gates are effectively disabled or non-functional
  • wallet listener lifecycle inconsistencies and full-history polling scalability concerns
  • duplicated hooks / unused UI surface / stylesheet consolidation opportunities

• Repository hygiene in this PR

  • Removed accidentally generated package-lock.json from branch to keep scope focused on the audit artifact.

Example evidence excerpt reflected in the report:

// app/create/page.tsx
const metadata = { content: message || "", isAnonymous };
const obfuscatedMessage = btoa(JSON.stringify(metadata)); // obfuscation, not encryption

// app/packet/[id]/page.tsx
const data = await contract.getRedPacketDetails(BigInt(packetId)); // requires numeric packetId

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Project	Deployment	Actions	Updated (UTC)
crypto-gift-time-capsule	Ready	Preview, Comment	Apr 19, 2026 2:53pm