supabase / supabase / 29565573430

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test(logs): regression coverage for datepicker Invalid time value crash (#48027)

## Problem

The database-report chart to logs flow could crash the logs date picker
with "RangeError: Invalid time value" (react-day-picker formatting an
Invalid Date), and there was no regression coverage for it.

## Fix

Adds two Vitest tests that reproduce the crash path:

- Logs.Datepickers.test.tsx: opening LogsDatePicker with an unparseable
value (the legacy epoch-ms its/ite) must render the calendar instead of
throwing.
- LogsPreviewer.test.tsx (MSW): its/ite from the URL load into the
picker and it opens without crashing, covering the chart-to-logs
navigation end to end.

Note: these tests depend on the fix in #48009. On master the crash-guard
test fails with the exact "Invalid time value" error (that is the
regression it catches), so CI here will be red until #48009 merges.

## How to test

- Run: pnpm --filter studio exec vitest --run
tests/features/logs/Logs.Datepickers.test.tsx
tests/features/logs/LogsPreviewer.test.tsx
- On master: the "unparseable date value" test fails with RangeError:
Invalid time value.
- With #48009 merged in: both pass.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Tests**
* Added coverage to ensure the logs date picker handles legacy or
unparseable date values without crashing.
* Added coverage verifying log preview date ranges are populated from
URL parameters and can be opened successfully.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

1212 of 1669 branches covered (72.62%)

Branch coverage included in aggregate %.

1784 of 2371 relevant lines covered (75.24%)

240.24 hits per line