… and deep-link

… + units

Upstream independently shipped a redesigned settings tree, a per-profile
UnitsPreference + UnitsFormatter units system, and a manual-entry profile
editor (ProfileSettingsView) — all overlapping this branch. Reconciled by
adopting upstream's implementations and re-homing only the parts unique to
this PR (HealthKit sync, Apple Health profile import, advanced calories).

Units (drop the homegrown WorkoutAppGroup.useImperialUnits toggle):
- ActivityView/TodayView/VitalsView/RecordViews/Components: read upstream's
  profile `units` via UnitsFormatter (distance, pace, temperature). Distance
  trend graphs keep a units-derived numeric divisor.
- Threaded `units` through the splits UI (SplitStrip/SplitsTable/kmSplitSeconds)
  and ActivityWorkoutRow instead of the global flag.
- Kept WorkoutAppGroup.useImperialUnits ONLY as an app-group mirror for the
  Live Activity widget (can't read SwiftData) and model-layer unit labels;
  it's now written from profile.units on save and seeded at launch.

Profile editor:
- Dropped ProfileEditView + AppRoute.profileEdit in favor of upstream's
  ProfileSettingsView; ported the "Sync from Apple Health" import into it.

Advanced calories:
- Moved the "Use advanced calories" toggle into upstream's WorkoutSettingsView
  (Activity Tracking); the calorie calc still reads the same app-group key.

Activity buckets:
- Kept upstream's idempotent upsert-by-timestamp applyActivityBucket (dropped
  this branch's resetDay variant) while preserving the HealthKit
  triggerAutomaticSync hook in PulseEventBus.

Verified: clean simulator build + full test suite (144 passed) on iOS 26.5.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…tion)

HealthSettingsSection (connection status, authorization, and 'Sync workouts history') existed but was never rendered. Add an 'Apple Health' settings row + settingsHealth route + HealthSettingsDetailView wrapper, matching the CoachSettingsDetailView idiom.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

HealthSyncService was export-only. Add an import path so workouts logged
by other apps (Apple Watch, Whoop, Strava, …) and stored in Apple Health
appear in PulseLoop's activity/workouts section alongside natively
recorded sessions.

- importWorkouts(): query HKWorkouts over a bounded lookback, create a
  finished ActivitySession for each, pulling calories/distance/HR via the
  non-deprecated statistics(for:) API.
- Skip workouts this app wrote to Health (own HK source) to avoid a loop.
- Dedupe re-imports by HKWorkout.uuid, stored on a new optional
  ActivitySession.healthKitWorkoutID (additive → lightweight migration).
- Map HKWorkoutActivityType onto PulseLoop's canonical activity types.
- Exclude imported rows from the export path and daily-total netting (incl.
  forced re-sync) so they're never written back or double-counted.

ActivityView already @querys finished sessions, so imports surface with no
UI change. Adds a unit test for the type mapping (HKHealthStore can't be
exercised in unit tests).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

These predate the workout-import change but fail the SwiftLint job (serious
violations exit non-zero even without --strict):
- HealthSettingsSection.swift: wrap two >200-char alert message strings.
- RecordViews.swift: inline a single-use local to drop the file one line under
  the 1000-line file_length limit.

No behavior change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>