feat: data layer with types, 50 workouts, and Zustand stores

Types: Workout, Exercise, Trainer, UserProfile, UserSettings,
WorkoutResult, Achievement, Collection, Program.

Mock data: 50 workouts across 5 categories (full-body, core,
upper-body, lower-body, cardio), 4 durations (4/8/12/20 min),
3 levels, 5 trainers. Plus 6 collections, 3 programs, and
8 achievements.

Zustand stores with AsyncStorage persistence:
- userStore: profile, settings (haptics, sound, voice, reminders)
- activityStore: workout history, streak tracking
- playerStore: ephemeral timer state (not persisted)

Helper lookups: getWorkoutById, getWorkoutsByCategory,
getTrainerById, getPopularWorkouts, getCollectionWorkouts, etc.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/shared/data/achievements.ts

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+/**
+ * TabataFit Achievement Definitions
+ */
+
+import { Achievement } from '../types'
+
+export const ACHIEVEMENTS: Achievement[] = [
+  {
+    id: 'first-burn',
+    title: 'First Burn',
+    description: 'Complete your first workout',
+    icon: 'flame',
+    requirement: 1,
+    type: 'workouts',
+  },
+  {
+    id: 'week-warrior',
+    title: 'Week Warrior',
+    description: '7 day streak',
+    icon: 'calendar',
+    requirement: 7,
+    type: 'streak',
+  },
+  {
+    id: 'century-club',
+    title: 'Century Club',
+    description: 'Burn 100 calories total',
+    icon: 'flame',
+    requirement: 100,
+    type: 'calories',
+  },
+  {
+    id: 'iron-will',
+    title: 'Iron Will',
+    description: 'Complete 10 workouts',
+    icon: 'trophy',
+    requirement: 10,
+    type: 'workouts',
+  },
+  {
+    id: 'tabata-master',
+    title: 'Tabata Master',
+    description: 'Complete 50 workouts',
+    icon: 'star',
+    requirement: 50,
+    type: 'workouts',
+  },
+  {
+    id: 'marathon-burner',
+    title: 'Marathon Burner',
+    description: 'Exercise for 100 minutes total',
+    icon: 'time',
+    requirement: 100,
+    type: 'minutes',
+  },
+  {
+    id: 'unstoppable',
+    title: 'Unstoppable',
+    description: '30 day streak',
+    icon: 'rocket',
+    requirement: 30,
+    type: 'streak',
+  },
+  {
+    id: 'calorie-crusher',
+    title: 'Calorie Crusher',
+    description: 'Burn 1000 calories total',
+    icon: 'flame',
+    requirement: 1000,
+    type: 'calories',
+  },
+]

src/shared/data/collections.ts

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+/**
+ * TabataFit Collections & Programs
+ */
+
+import { Collection, Program } from '../types'
+
+export const COLLECTIONS: Collection[] = [
+  {
+    id: 'morning-energizer',
+    title: 'Morning Energizer',
+    description: 'Start your day right',
+    icon: '🌅',
+    workoutIds: ['4', '6', '43', '47', '10'],
+  },
+  {
+    id: 'no-equipment',
+    title: 'No Equipment',
+    description: 'Workout anywhere',
+    icon: '💪',
+    workoutIds: ['1', '4', '6', '11', '13', '16', '17', '19', '23', '26', '31', '38', '42', '43', '45'],
+  },
+  {
+    id: '7-day-burn',
+    title: '7-Day Burn Challenge',
+    description: 'Transform in one week',
+    icon: '🔥',
+    workoutIds: ['1', '11', '31', '42', '6', '17', '23'],
+    gradient: ['#FF6B35', '#FF3B30'],
+  },
+  {
+    id: 'quick-intense',
+    title: 'Quick & Intense',
+    description: 'Max effort in 4 minutes',
+    icon: '⚡',
+    workoutIds: ['1', '11', '23', '35', '38', '42', '6', '17'],
+  },
+  {
+    id: 'core-focus',
+    title: 'Core Focus',
+    description: 'Build a solid foundation',
+    icon: '🎯',
+    workoutIds: ['11', '12', '13', '14', '16', '17'],
+  },
+  {
+    id: 'leg-day',
+    title: 'Leg Day',
+    description: 'Never skip leg day',
+    icon: '🦵',
+    workoutIds: ['31', '32', '33', '34', '35', '36', '37'],
+  },
+]
+
+export const PROGRAMS: Program[] = [
+  {
+    id: 'beginner-journey',
+    title: 'Beginner Journey',
+    description: 'Your first steps into Tabata fitness',
+    weeks: 2,
+    workoutsPerWeek: 3,
+    level: 'Beginner',
+    workoutIds: ['1', '13', '31', '43', '6', '16'],
+  },
+  {
+    id: 'strength-builder',
+    title: 'Strength Builder',
+    description: 'Progressive strength development',
+    weeks: 4,
+    workoutsPerWeek: 4,
+    level: 'Intermediate',
+    workoutIds: ['2', '21', '32', '9', '14', '25', '35', '29', '7', '23', '39', '44', '11', '42', '8', '27'],
+  },
+  {
+    id: 'fat-burn-protocol',
+    title: 'Fat Burn Protocol',
+    description: 'Maximum calorie burn program',
+    weeks: 6,
+    workoutsPerWeek: 5,
+    level: 'Advanced',
+    workoutIds: ['3', '41', '12', '34', '46', '5', '18', '27', '36', '50', '8', '15', '24', '38', '44', '20', '30', '40', '46', '50', '3', '41', '5', '8', '12', '15', '18', '24', '27', '34'],
+  },
+]
+
+export const FEATURED_COLLECTION_ID = '7-day-burn'

src/shared/data/index.ts

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+/**
+ * TabataFit Data Layer
+ * Single source of truth + helper lookups
+ */
+
+import { WORKOUTS } from './workouts'
+import { TRAINERS } from './trainers'
+import { COLLECTIONS, PROGRAMS, FEATURED_COLLECTION_ID } from './collections'
+import { ACHIEVEMENTS } from './achievements'
+import type { WorkoutCategory, WorkoutLevel, WorkoutDuration } from '../types'
+
+// Re-export raw data
+export { WORKOUTS, TRAINERS, COLLECTIONS, PROGRAMS, ACHIEVEMENTS, FEATURED_COLLECTION_ID }
+
+// ═══════════════════════════════════════════════════════════════════════════
+// WORKOUT LOOKUPS
+// ═══════════════════════════════════════════════════════════════════════════
+
+export function getWorkoutById(id: string) {
+  return WORKOUTS.find(w => w.id === id)
+}
+
+export function getWorkoutsByCategory(category: WorkoutCategory) {
+  return WORKOUTS.filter(w => w.category === category)
+}
+
+export function getWorkoutsByTrainer(trainerId: string) {
+  return WORKOUTS.filter(w => w.trainerId === trainerId)
+}
+
+export function getWorkoutsByLevel(level: WorkoutLevel) {
+  return WORKOUTS.filter(w => w.level === level)
+}
+
+export function getWorkoutsByDuration(duration: WorkoutDuration) {
+  return WORKOUTS.filter(w => w.duration === duration)
+}
+
+export function getFeaturedWorkouts() {
+  return WORKOUTS.filter(w => w.isFeatured)
+}
+
+export function getPopularWorkouts(count = 8) {
+  // Simulate popularity — pick a diverse spread
+  return WORKOUTS.filter(w => ['1', '11', '21', '31', '41', '42', '2', '32'].includes(w.id)).slice(0, count)
+}
+
+// ═══════════════════════════════════════════════════════════════════════════
+// TRAINER LOOKUPS
+// ═══════════════════════════════════════════════════════════════════════════
+
+export function getTrainerById(id: string) {
+  return TRAINERS.find(t => t.id === id)
+}
+
+export function getTrainerByName(name: string) {
+  return TRAINERS.find(t => t.name.toLowerCase() === name.toLowerCase())
+}
+
+// ═══════════════════════════════════════════════════════════════════════════
+// COLLECTION LOOKUPS
+// ═══════════════════════════════════════════════════════════════════════════
+
+export function getCollectionById(id: string) {
+  return COLLECTIONS.find(c => c.id === id)
+}
+
+export function getCollectionWorkouts(collectionId: string) {
+  const collection = getCollectionById(collectionId)
+  if (!collection) return []
+  return collection.workoutIds.map(id => getWorkoutById(id)).filter(Boolean)
+}
+
+export function getFeaturedCollection() {
+  return getCollectionById(FEATURED_COLLECTION_ID)
+}
+
+// ═══════════════════════════════════════════════════════════════════════════
+// PROGRAM LOOKUPS
+// ═══════════════════════════════════════════════════════════════════════════
+
+export function getProgramById(id: string) {
+  return PROGRAMS.find(p => p.id === id)
+}
+
+// ═══════════════════════════════════════════════════════════════════════════
+// CATEGORY METADATA
+// ═══════════════════════════════════════════════════════════════════════════
+
+export const CATEGORIES: { id: WorkoutCategory | 'all'; label: string }[] = [
+  { id: 'all', label: 'All' },
+  { id: 'full-body', label: 'Full Body' },
+  { id: 'core', label: 'Core' },
+  { id: 'upper-body', label: 'Upper Body' },
+  { id: 'lower-body', label: 'Lower Body' },
+  { id: 'cardio', label: 'Cardio' },
+]
+
+// SF Symbol icon map for collections
+export const COLLECTION_ICONS: Record<string, string> = {
+  'morning-energizer': 'sunrise.fill',
+  'no-equipment': 'figure.strengthtraining.traditional',
+  '7-day-burn': 'flame.fill',
+  'quick-intense': 'bolt.fill',
+  'core-focus': 'target',
+  'leg-day': 'figure.walk',
+}
+
+// Collection color map
+export const COLLECTION_COLORS: Record<string, string> = {
+  'morning-energizer': '#FFD60A',
+  'no-equipment': '#30D158',
+  '7-day-burn': '#FF3B30',
+  'quick-intense': '#FF3B30',
+  'core-focus': '#5AC8FA',
+  'leg-day': '#BF5AF2',
+}

src/shared/data/trainers.ts

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+/**
+ * TabataFit Trainer Data
+ * 5 trainers per PRD
+ */
+
+import { Trainer } from '../types'
+
+export const TRAINERS: Trainer[] = [
+  {
+    id: 'emma',
+    name: 'Emma',
+    specialty: 'Full Body',
+    color: '#FF6B35',
+    workoutCount: 15,
+  },
+  {
+    id: 'jake',
+    name: 'Jake',
+    specialty: 'Strength',
+    color: '#FFD60A',
+    workoutCount: 12,
+  },
+  {
+    id: 'mia',
+    name: 'Mia',
+    specialty: 'Core',
+    color: '#30D158',
+    workoutCount: 10,
+  },
+  {
+    id: 'alex',
+    name: 'Alex',
+    specialty: 'Cardio',
+    color: '#5AC8FA',
+    workoutCount: 8,
+  },
+  {
+    id: 'sofia',
+    name: 'Sofia',
+    specialty: 'Recovery',
+    color: '#BF5AF2',
+    workoutCount: 5,
+  },
+]