chore: remove v1 features and old scaffolding

Remove onboarding flow (6 screens), timer engine, audio engine,
old components (themed-text/view, parallax-scroll, hello-wave),
old constants (theme, shadows, timer), and utility files that
were replaced by the v2 architecture.

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

src/shared/components/GlassView.tsx

@@ -1,32 +0,0 @@
-import { StyleSheet, View, type ViewProps } from 'react-native'
-import { BlurView } from 'expo-blur'
-import { GLASS } from '../constants/colors'
-
-interface GlassViewProps extends ViewProps {
-  intensity?: number
-  children: React.ReactNode
-}
-
-export function GlassView({
-  intensity = GLASS.BLUR_MEDIUM,
-  style,
-  children,
-  ...rest
-}: GlassViewProps) {
-  return (
-    <View style={[styles.container, style]} {...rest}>
-      <BlurView intensity={intensity} tint="dark" style={StyleSheet.absoluteFill} />
-      {children}
-    </View>
-  )
-}
-
-const styles = StyleSheet.create({
-  container: {
-    overflow: 'hidden',
-    backgroundColor: GLASS.FILL,
-    borderWidth: 0.5,
-    borderColor: GLASS.BORDER,
-    borderTopColor: GLASS.BORDER_TOP,
-  },
-})

src/shared/components/Typography.tsx

@@ -1,25 +0,0 @@
-import { Text, type TextProps } from 'react-native'
-import { TYPOGRAPHY } from '../constants/typography'
-import { TEXT } from '../constants/colors'
-
-type TypographyVariant = keyof typeof TYPOGRAPHY
-
-interface TypographyProps extends TextProps {
-  variant: TypographyVariant
-  color?: string
-  children: React.ReactNode
-}
-
-export function Typography({
-  variant,
-  color = TEXT.PRIMARY,
-  style,
-  children,
-  ...rest
-}: TypographyProps) {
-  return (
-    <Text style={[TYPOGRAPHY[variant], { color }, style]} {...rest}>
-      {children}
-    </Text>
-  )
-}

src/shared/constants/shadows.ts

@@ -1,44 +0,0 @@
-import type { TextStyle, ViewStyle } from 'react-native'
-
-export const SHADOW = {
-  BRAND_GLOW: {
-    shadowColor: '#F97316',
-    shadowOffset: { width: 0, height: 4 },
-    shadowOpacity: 0.5,
-    shadowRadius: 20,
-    elevation: 12,
-  } as ViewStyle,
-
-  WHITE_GLOW: {
-    shadowColor: '#FFFFFF',
-    shadowOffset: { width: 0, height: 0 },
-    shadowOpacity: 0.8,
-    shadowRadius: 6,
-  } as ViewStyle,
-} as const
-
-export const TEXT_SHADOW = {
-  BRAND: {
-    textShadowColor: 'rgba(249, 115, 22, 0.5)',
-    textShadowOffset: { width: 0, height: 0 },
-    textShadowRadius: 30,
-  } as TextStyle,
-
-  WHITE_SOFT: {
-    textShadowColor: 'rgba(255, 255, 255, 0.25)',
-    textShadowOffset: { width: 0, height: 0 },
-    textShadowRadius: 30,
-  } as TextStyle,
-
-  WHITE_MEDIUM: {
-    textShadowColor: 'rgba(255, 255, 255, 0.3)',
-    textShadowOffset: { width: 0, height: 0 },
-    textShadowRadius: 20,
-  } as TextStyle,
-
-  DANGER: {
-    textShadowColor: 'rgba(239, 68, 68, 0.6)',
-    textShadowOffset: { width: 0, height: 0 },
-    textShadowRadius: 40,
-  } as TextStyle,
-} as const

src/shared/constants/timer.ts

@@ -1,10 +0,0 @@
-export const TIMER_DEFAULTS = {
-  WORK_DURATION: 20,
-  REST_DURATION: 10,
-  ROUNDS: 8,
-  GET_READY_DURATION: 10,
-  CYCLES: 1,
-  CYCLE_PAUSE_DURATION: 60,
-} as const
-
-export const TICK_INTERVAL_MS = 100

src/shared/utils/formatTime.ts

@@ -1,8 +0,0 @@
-export function formatTime(totalSeconds: number): string {
-  const mins = Math.floor(totalSeconds / 60)
-  const secs = totalSeconds % 60
-  if (mins > 0) {
-    return `${mins}:${secs.toString().padStart(2, '0')}`
-  }
-  return `${secs}`
-}