Import abstract base classes from collections.abc instead of typing

[dhruvbatra]

Summary

Callable, Iterable, Iterator, Mapping, and Sequence have been deprecated as typing aliases since Python 3.9 (PEP 585), with the canonical home being collections.abc. This PR moves those imports to collections.abc across the SDK.

Files updated:

• yutori/_async/chat.py — Iterable
• yutori/_sync/chat.py — Iterable
• yutori/navigator/loop.py — Iterable
• yutori/navigator/payload.py — Callable
• yutori/navigator/coordinates.py — Sequence
• yutori/cli/commands/__init__.py — Iterator
• yutori/cli/commands/install_flow.py — Mapping, Sequence
• yutori/auth/flow.py — Callable

Safety

• Import-only, behavior-preserving change.
• PEP 585 makes the collections.abc forms subscriptable at runtime since Python 3.9, matching the package's requires-python = ">=3.9". The change is therefore safe across the full 3.9–3.13 CI matrix, regardless of whether a module uses from __future__ import annotations.
• ruff check . passes (including import-order rule I).
• Verified the edited modules parse and coordinates.py runs correctly.

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Generated by Claude Code

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Note

Low Risk
Import-only, behavior-preserving change aligned with the package’s Python ≥3.9 support; no logic or API surface changes.

Overview
Updates type-only imports to follow PEP 585: abstract collection types that were deprecated on typing since Python 3.9 now come from collections.abc instead.

Touched areas include sync/async chat completions (Iterable), Navigator helpers (Iterable, Callable, Sequence), OAuth login (Callable), and CLI install/error helpers (Iterator, Mapping, Sequence). Annotations and call sites are unchanged; only import lines were split or rewired.

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