v0.99.64

Fixes

• Preserve replies when sending fails, recover failed storage writes and
  deferred history requests, and ignore late history for closed conversations.
• Serialize concurrent searches and retain queue recovery after errors and
  timeouts. Reject queued searches after reconnecting to a new socket.
• Validate saved receipts and preferences, handle cross-tab storage clearing,
  normalize IRC commands, harden message formatting and support single-token
  PONG replies.
• Validate OAuth issuer identity and response types. OAuth configuration must
  match the provider's issuer exactly, including any trailing slash.
• Refresh memoized message callbacks when their parent handlers change.

Maintenance

• Split large persistence, backlog, messaging, connection and rendering modules
  along responsibility boundaries while preserving public imports.
• Update compatible dependencies to their latest stable releases, including
  jsdom 31, and patch the minimatch advisory. TypeScript 7.0.2 remains the
  typechecker; TypeScript 6 remains for typescript-eslint's compiler API.
• Add 38 regression/recovery tests and tighten coverage thresholds. Document
  findings, fixes, module boundaries and validation in doc/codebase-audit.md.

Validation

• 725 unit/component tests and 64 desktop/mobile browser tests pass.
• Typechecking, lint, formatting, production build and coverage checks pass.
• Coverage: 89.96% statements, 83.35% branches, 90.12% functions, 90.01% lines.
• npm audit reports zero vulnerabilities. Ten optional screenshot generators
  remain disabled by their existing configuration.