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📝(front) add OpenSpec artifacts for timezone double conversion fix

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Add proposal, design, specs and tasks for the fix-timezone-double-conversion
change. Documents the root cause (icsDateToJsDate returning fake UTC causing
double browser offset), the Intl.DateTimeFormat-based solution, and 40+
test scenarios covering DST, cross-timezone, half-hour offsets, and
round-trip conversions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Nathan Panchout
2026-01-29 11:12:58 +01:00
parent 79f352b738
commit 9e982a8eb1
5 changed files with 381 additions and 0 deletions
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openspec/changes/fix-timezone-double-conversion/.openspec.yaml Normal file
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schema: spec-driven
created: 2026-01-29