add tool approval UI and E2E test infrastructure#16

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bendrucker wants to merge 3 commits intopydantic:mainfrom

bendrucker:e2e-test

Commits on Mar 15, 2026

feat: add tool approval UI and E2E test infrastructure
bendrucker
committed

Commits on Mar 16, 2026

feat: add E2E tests for error handling, multi-tool, and conversation lifecycle
bendrucker
committed
refactor: organize E2E tests and add LLM provider tests
bendrucker
committed