GET /api/v1/photos rejected ?date_from=2026-04-10 with 422 because
pydantic v2's datetime parser doesn't accept date-only strings. The
frontend has been padding date_to with T23:59:59 forever to make the
upper bound inclusive, but date_from went out as a bare YYYY-MM-DD,
so every date-range filter request 422'd and the grid showed nothing.
Frontend: pad date_from with T00:00:00 the same way date_to gets
T23:59:59 — symmetry, and pydantic v2 accepts the full form.
Backend: change date_from/date_to to Optional[str] and parse with
datetime.fromisoformat in the handler. fromisoformat accepts both
bare dates ('2026-04-10' -> midnight) and full ISO strings, so any
older client that still sends a date-only value continues to work.
Tz-aware values get coerced to naive UTC before binding (matches the
taken_at column's shape and the same
fix applied to PATCH /photos/{id} earlier today). Bad input returns
400 with a clear message instead of pydantic's 422.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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