feat: add safe calendar import and export

Add explicit noninteractive CLI transfer modes with full event validation, idempotent duplicate handling, collision refusal, atomic import backups, and no-overwrite export creation.

Cover pure merge semantics and end-to-end rollback paths for unsupported content, invalid identities, conflicts, option combinations, and existing destinations.
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2026-07-18 09:32:54 +01:00
parent 8b6cf2e877
commit b524e6e33d
11 changed files with 867 additions and 8 deletions

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- Occurrence-aware appointment search with exact result-to-grid navigation
- Session calendar toggles shared by month rendering, focus, and search
- Read-only 42-day agenda with bounded recurrence and exact return navigation
- Explicit atomic import/export with validation, collision refusal, and backups
- Meson build, Nix development shell, desktop entry, and Hyprland launcher
- Seeded sample data when explicitly requested, never silent data mutation
## 0.1 — complete local calendar
- Advanced recurrence editing, RDATE/overrides, and embedded VTIMEZONE support
- Import/export and configurable week start
- Configurable week start
- Screen-reader-friendly linear view and full Unicode display-width handling
## 0.2 — durable cache and provider boundary