elky 082348a5d1 fix: restore dashboard history and complete activity calendar ...

Combine retained daily aggregates with recent usage without replaying historical records or changing the activation boundary. Complete activation-day metrics and expose the UTC calendar used by legacy history.

Render all 365 calendar dates, size heatmap cells responsively, and soften cell corners. Add regression coverage for history cutoffs, retention, sparse dates, and timezone boundaries.

2026-10-05 19:03:33 +08:00

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postgres

fix: restore dashboard history and complete activity calendar

2026-10-05 19:03:33 +08:00