feat: Update UI colors to use dynamic theme system and fix predictions

**Theme-Aware Colors Across App:**
- Updated track page cards to use theme.palette colors
- Updated analytics page icons to use theme colors
- Updated login/register gradient backgrounds to use theme colors
- All colors now respond to Standard/High Contrast theme toggle

**Fixed Next Predicted Activity Section:**
- Connected to real analytics API predictions endpoint
- Fetches sleep and feeding predictions based on actual data
- Shows "Nap time in X minutes" when prediction available
- Displays formatted time using formatDistanceToNow
- Falls back to "Not enough data available for now. Keep tracking :)" when no predictions

**Multi-Language Support:**
- Added "notEnoughData" translation key to all 7 languages:
  - English: "Not enough data available for now. Keep tracking :)"
  - Spanish: "No hay suficientes datos disponibles por ahora. ¡Sigue rastreando! :)"
  - French: "Pas assez de données disponibles pour le moment. Continuez à suivre :)"
  - Portuguese: "Dados insuficientes disponíveis no momento. Continue rastreando :)"
  - Chinese: "暂无足够数据。请继续记录 :)"
  - German: "Derzeit nicht genügend Daten verfügbar. Weiter verfolgen :)"
  - Italian: "Dati insufficienti al momento. Continua a monitorare :)"

**Color Mapping by Theme:**

*Purple Theme (Standard):*
- Feeding: Primary (#8b52ff)
- Sleep: Secondary (#ff7094)
- Diaper: Warning (amber)
- Medical: Error (red)
- Activity: Success (green)
- Growth: Primary Dark

*Peach Theme (High Contrast):*
- Feeding: Primary (#FFB6C1)
- Sleep: Secondary (#FFDAB9)
- Diaper: Warning (amber)
- Medical: Error (red)
- Activity: Success (green)
- Growth: Primary Dark

**Files Modified:**
- app/track/page.tsx - Dynamic theme colors
- app/analytics/page.tsx - Theme-aware icon colors
- app/(auth)/login/page.tsx - Gradient uses theme
- app/(auth)/register/page.tsx - Gradient uses theme
- app/page.tsx - Predictions integration
- locales/*/dashboard.json - All 7 languages

🎉 Generated with [Claude Code](https://claude.com/claude-code)

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

maternal-web/locales/de/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Nächste vorhergesagte Aktivität",
     "napTime": "Mittagsschlaf in {{minutes}} Minuten",
-    "basedOnPatterns": "Basierend auf den Schlafmustern Ihres Kindes"
+    "basedOnPatterns": "Basierend auf den Schlafmustern Ihres Kindes",
+    "notEnoughData": "Derzeit nicht genügend Daten verfügbar. Weiter verfolgen :)"
   }
 }

maternal-web/locales/en/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Next Predicted Activity",
     "napTime": "Nap time in {{minutes}} minutes",
-    "basedOnPatterns": "Based on your child's sleep patterns"
+    "basedOnPatterns": "Based on your child's sleep patterns",
+    "notEnoughData": "Not enough data available for now. Keep tracking :)"
   }
 }

maternal-web/locales/es/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Próxima Actividad Predicha",
     "napTime": "Hora de siesta en {{minutes}} minutos",
-    "basedOnPatterns": "Basado en los patrones de sueño de tu hijo"
+    "basedOnPatterns": "Basado en los patrones de sueño de tu hijo",
+    "notEnoughData": "No hay suficientes datos disponibles por ahora. ¡Sigue rastreando! :)"
   }
 }

maternal-web/locales/fr/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Prochaine Activité Prédite",
     "napTime": "Heure de sieste dans {{minutes}} minutes",
-    "basedOnPatterns": "Basé sur les habitudes de sommeil de votre enfant"
+    "basedOnPatterns": "Basé sur les habitudes de sommeil de votre enfant",
+    "notEnoughData": "Pas assez de données disponibles pour le moment. Continuez à suivre :)"
   }
 }

maternal-web/locales/it/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Prossima Attività Prevista",
     "napTime": "Ora del pisolino tra {{minutes}} minuti",
-    "basedOnPatterns": "Basato sui modelli di sonno del tuo bambino"
+    "basedOnPatterns": "Basato sui modelli di sonno del tuo bambino",
+    "notEnoughData": "Dati insufficienti al momento. Continua a monitorare :)"
   }
 }

maternal-web/locales/pt/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "Próxima Atividade Prevista",
     "napTime": "Hora da soneca em {{minutes}} minutos",
-    "basedOnPatterns": "Baseado nos padrões de sono do seu filho"
+    "basedOnPatterns": "Baseado nos padrões de sono do seu filho",
+    "notEnoughData": "Dados insuficientes disponíveis no momento. Continue rastreando :)"
   }
 }

maternal-web/locales/zh/dashboard.json

@@ -25,6 +25,7 @@
   "predictions": {
     "title": "下一个预测活动",
     "napTime": "{{minutes}}分钟后午睡时间",
-    "basedOnPatterns": "基于您孩子的睡眠模式"
+    "basedOnPatterns": "基于您孩子的睡眠模式",
+    "notEnoughData": "暂无足够数据。请继续记录 :)"
   }
 }