Recurrence previously only supported 5 fixed rules with no interval.
Adds TaskItem.recurrenceInterval (optional, nil = 1, so every existing
task is unaffected), a stepper in the shared create/edit sheet, quick-add
NLP for phrases like "every 2 weeks"/"biweekly"/"fortnightly", and
threads the interval through both countdown widgets so their progress
bars size correctly for biweekly/etc tasks too.
Built on KC-69's consolidated RecurrenceRule engine. Verified two things
by actually compiling and running standalone swiftc drivers rather than
just reading: the core interval math (44/44, unchanged from KC-69) and
the new quick-add regex patterns against realistic phrases including
"look into tru housing options every two weeks" (11/11 passing).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Before adding "every N weeks/months" support, found the recurrence
window math was independently hand-written in three places (main app's
TaskItem.isOccurrence, and two separate widget extensions' countdown
progress calculations) with no shared code to keep them in sync.
Extracted the math into Shared/RecurrenceRule.swift (pure Foundation,
no framework deps) compiled into both the app and widget extension
targets via a new project.yml Shared/ source path, and pointed all
three call sites at it. Verified every case is identical to prior
behavior at interval==1 by compiling and running a standalone test
driver directly against the real file with swiftc - 38/38 passing,
including Jan-31-monthly and Feb-29-leap-year-yearly edge cases.
Groundwork only - no recurrenceInterval field on TaskItem yet, the
actual interval feature comes next on top of this.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
