fix: correct send_message and update_event return contracts (closes #238, closes #239)

[Olen]

Summary

Closes #238 and closes #239 in one PR — both bugs are in adjacent message/event chat-write paths, both fixes are tightly scoped, and bundling them keeps the review under one round-trip.

#238 — `send_message()`

Three issues:

1. Missing `await` on `_continue_chat()`. Callers using the `chat_id` path were getting an unawaited coroutine object back instead of the API response, plus a `RuntimeWarning: coroutine '_continue_chat' was never awaited` at GC time.
2. Sentinel-dict response when args are inconsistent. Was returning `{"error": "wrong usage, ..."}`; now raises `ValueError` so the failure is loud and the return-type annotation is finally honest.
3. Unreachable `return False` branch. `get_person()` raises `KeyError` rather than returning falsy, so `if user_obj: ... else: return False` was dead code. Removed.

Docstring: dropped the "Notes / known bugs" block (bugs are gone); added `Raises` section.

#239 — `update_event()`

The method was assigning the POST response to `self.events_update` and then `return self.events` (the unrelated cached events list). Fix:

• Return `await r.json()` directly — the actual API response.
• Drop the now-unused `self.events_update` attribute entirely. It was only ever set inside this one method and never read anywhere else (grep across `spond/`, `tests/`, `examples/` confirms zero consumers).

Return annotation tightened from `list[JSONDict] | None` to `JSONDict`.

Tests added

• `test_update_event__returns_api_response` — locks in update_event() returns cached events list instead of the API update response #239 fix.
• `test_send_message__continues_chat_when_chat_id_given` — locks in send_message() missing await on _continue_chat() and can return False despite JSONDict annotation #238 fix API documentation? #1 (the await would have triggered `TypeError: object MagicMock can't be used in 'await' expression` in tests if `_continue_chat` weren't awaited).
• `test_send_message__missing_args_raises_valueerror` — locks in send_message() missing await on _continue_chat() and can return False despite JSONDict annotation #238 fix getGroup(uid) always returns None #2 (three parameterised cases: no chat_id at all, user-only, group_uid-only).

27 tests pass total (up from 24).

Compatibility

Both changes are technically breaking for callers depending on undocumented behaviour (the sentinel dict, the cache-list return). But the return-type annotations always claimed `JSONDict` / the correct shape, so any consumer respecting the type contract was already broken in practice. The new behaviour matches the contract.

Test plan

• Local `pytest` — 27 tests pass (was 24)
• Local `ruff check` — clean
• Local `ruff format --check` — clean
• CI: 4-version matrix green
• Copilot review: addressed all comments

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Fixes two bugs in Spond chat/event write paths: send_message() was missing await on _continue_chat() and had a sentinel-dict / unreachable-return False pattern violating its JSONDict annotation; update_event() returned the unrelated cached self.events list instead of the API response. Both fixes tighten the return-type contracts and add regression tests.

Changes:

• send_message(): add await on _continue_chat, raise ValueError for inconsistent args (instead of returning sentinel dict), drop unreachable return False branch, and refresh docstring.
• update_event(): return await r.json() directly, drop unused self.events_update attribute, and tighten return annotation to JSONDict.
• Add 3 new tests covering the fixed behaviors (chat-id continuation, missing-args validation, update_event response).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
spond/spond.py	Corrects return contracts and async usage in send_message and update_event; updates docstrings/annotations.
tests/test_spond.py	Adds regression tests for update_event response and send_message chat-id/await + ValueError paths.

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