chore(app): vendor v2 client snapshot

[Brendonovich]

Summary

• replace the feature-branch client tarball with a snapshot built from origin/v2 at 828148909d
• disable client APIs and events that are not yet available on v2 while preserving guarded v1 behavior
• align current tool event projection with the v2 client schema
• keep branch review E2E coverage on v1 and assert ticketless v2 terminal connections

Testing

• repository pre-push typecheck: 30 packages passed
• bun run typecheck:e2e in packages/app
• bun run test:e2e in packages/app: 92 passed
• 108 focused app tests across client compatibility, bootstrap, sync, and session projection
• full app unit run: 670 passed; the existing Arabic i18n parity test failed on unrelated missing translation keys