Update the changelog and README for the machine-settings and seeding work

Claude-Session: https://claude.ai/code/session_01LEoff8bXGBS83tK1c55Mf7

README.md

@@ -7,25 +7,30 @@ your own iCloud Drive.
 ## Key Features
 
 - **Workout splits** — organize exercises into reusable routines with custom
-  colors, icons, and an activity type (strength, HIIT, cardio, …). Each exercise
-  is tagged as **warm-up** or **main circuit**, and the split screen groups its
-  list accordingly. Built-in starter splits (Upper Body / Core / Lower Body
+  colors, icons, and an activity type (strength, HIIT, cardio, …). Built-in
+  starter splits (Upper Body / Core / Lower Body
   machine routines, plus an equipment-free **Bodyweight Core** circuit with its
   own warm-up) appear automatically on first launch; editing one makes it your
   own copy, and deleted starters can be restored from Settings.
 - **Exercise library** — a bundled library of exercises to populate your splits,
   authored in `Exercise Library/` with per-exercise setup, cues, mistakes,
-  progressions, and a rig-animated stick-figure visual system.
+  progressions, and a rig-animated stick-figure visual system — covering the
+  bodyweight core moves plus the full Planet Fitness–style machine circuit
+  (presses, rows, pulldowns, curls, leg and hip machines).
 - **Run a workout** — start a session from a split, then tap an exercise to run it
   as a paged flow: a **Ready?** lead-in, count-up work phases, count-down rests, and
   a **Finish** page — mirroring the Apple Watch. Swipe a row to mark it complete, or
   swipe to edit its plan (sets/reps/weight or duration) and notes. End a workout early
   from the **⋯** menu — **Save** keeps your progress (remaining exercises are marked
   skipped) or **Discard** removes it.
-- **Animated form guide** — exercises with a bundled motion (the bodyweight core
-  moves, e.g. Bird Dog) show a looping stick-figure demonstration on the run
-  screen's bottom half, rendered live from the Exercise Library's rig data with
-  the working limbs highlighted.
+- **Animated form guide** — every library exercise shows a looping stick-figure
+  demonstration on the run screen's bottom half, rendered live from the Exercise
+  Library's rig data with the working limbs highlighted — machine exercises
+  include schematic equipment (seats, bars, cables, roller pads) that moves with
+  the figure.
+- **Machine comfort settings** — machine-based exercises remember your setup
+  (seat height, back-rest position, pin position, …), shown on the workout
+  screen and editable mid-workout; changes save back to the split for next time.
 - **Progress tracking** — weight-progression charts per exercise across past
   sessions.
 - **Apple Watch companion** — starting a workout on the iPhone launches the watch