feat: Implementar funcionalidades de Tarefas e Saúde

- Criadas APIs para Health (métricas de saúde)
  * Registrar peso, altura, % gordura, medidas
  * Histórico completo de medições
  * Estatísticas e resumo

- Criadas APIs para Tasks (tarefas)
  * Criar, editar e deletar tarefas
  * Filtros por status e data
  * Estatísticas detalhadas
  * Prioridades (baixa, média, alta)

- Frontend implementado:
  * Página Health.tsx - registro de métricas
  * Página Tasks.tsx - gerenciamento de tarefas
  * Página Progress.tsx - visualização de progresso
  * Dashboard integrado com estatísticas reais

- Schemas e modelos atualizados
- Todas as funcionalidades testadas e operacionais

backend/app/models/__init__.py

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+# Models package

backend/app/models/habit.py

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+from sqlalchemy import Column, String, Integer, Boolean, Date, Time, DateTime, ForeignKey, Text
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+import uuid
+
+from app.core.database import Base
+
+class Habit(Base):
+    __tablename__ = "habits"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), ForeignKey('users.id', ondelete='CASCADE'), nullable=False, index=True)
+    name = Column(String(255), nullable=False)
+    description = Column(Text)
+    frequency_type = Column(String(50), default='daily')
+    target_count = Column(Integer, default=1)
+    reminder_time = Column(Time)
+    start_date = Column(Date, default=func.current_date())
+    end_date = Column(Date)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+class HabitCompletion(Base):
+    __tablename__ = "habit_completions"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    habit_id = Column(UUID(as_uuid=True), ForeignKey('habits.id', ondelete='CASCADE'), nullable=False, index=True)
+    user_id = Column(UUID(as_uuid=True), ForeignKey('users.id', ondelete='CASCADE'), nullable=False, index=True)
+    completion_date = Column(Date, nullable=False, index=True)
+    completion_time = Column(Time)
+    notes = Column(Text)
+    quality_rating = Column(Integer)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())

backend/app/models/health.py

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+from sqlalchemy import Column, String, Date, Time, Numeric, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+import uuid
+
+from app.core.database import Base
+
+class HealthMetric(Base):
+    __tablename__ = "health_metrics"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
+    measurement_date = Column(Date, nullable=False)
+    measurement_time = Column(Time)
+    weight = Column(Numeric(5, 2))
+    height = Column(Numeric(5, 2))
+    body_fat_percentage = Column(Numeric(4, 2))
+    muscle_mass = Column(Numeric(5, 2))
+    waist = Column(Numeric(5, 2))
+    chest = Column(Numeric(5, 2))
+    hips = Column(Numeric(5, 2))
+    notes = Column(String)

backend/app/models/message.py

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+from sqlalchemy import Column, String, Text, Integer, Boolean, DateTime, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+import uuid
+
+from app.core.database import Base
+
+class MotivationalMessage(Base):
+    __tablename__ = "motivational_messages"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    message_type = Column(String(50), nullable=False)
+    trigger_condition = Column(String(100), nullable=False)
+    message_text = Column(Text, nullable=False)
+    icon = Column(String(10))
+    priority = Column(Integer, default=0)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class UserMessageLog(Base):
+    __tablename__ = "user_messages_log"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
+    message_id = Column(UUID(as_uuid=True), ForeignKey("motivational_messages.id", ondelete="SET NULL"))
+    message_text = Column(Text, nullable=False)
+    message_type = Column(String(50))
+    shown_at = Column(DateTime(timezone=True), server_default=func.now())
+    was_clicked = Column(Boolean, default=False)
+    clicked_at = Column(DateTime(timezone=True))

backend/app/models/streak.py

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+from sqlalchemy import Column, Integer, Date, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+import uuid
+
+from app.core.database import Base
+
+class Streak(Base):
+    __tablename__ = "streaks"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    habit_id = Column(UUID(as_uuid=True), ForeignKey("habits.id", ondelete="CASCADE"), nullable=False)
+    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
+    current_streak = Column(Integer, default=0)
+    longest_streak = Column(Integer, default=0)
+    last_completion_date = Column(Date)
+    total_completions = Column(Integer, default=0)

backend/app/models/task.py

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+from sqlalchemy import Column, String, Date, Time, Boolean, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+from datetime import datetime
+import uuid
+
+from app.core.database import Base
+
+class Task(Base):
+    __tablename__ = "tasks"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
+    category_id = Column(UUID(as_uuid=True), nullable=True)  # Removido FK para categories por enquanto
+    title = Column(String(255), nullable=False)
+    description = Column(String)
+    priority = Column(String(20), default='medium')
+    status = Column(String(20), default='pending')
+    due_date = Column(Date)
+    due_time = Column(Time)
+    is_archived = Column(Boolean, default=False)

backend/app/models/user.py

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+from sqlalchemy import Column, String, Boolean, DateTime
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+import uuid
+
+from app.core.database import Base
+
+class User(Base):
+    __tablename__ = "users"
+    
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    email = Column(String(255), unique=True, nullable=False, index=True)
+    username = Column(String(100), unique=True, nullable=False, index=True)
+    password_hash = Column(String(255), nullable=False)
+    full_name = Column(String(255))
+    phone = Column(String(20))  # NOVO
+    avatar_url = Column(String)
+    timezone = Column(String(50), default='America/Sao_Paulo')
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    last_login_at = Column(DateTime(timezone=True))
+    is_active = Column(Boolean, default=True)
+    is_verified = Column(Boolean, default=False)
+    is_superadmin = Column(Boolean, default=False)
+    verification_token = Column(String(255))  # NOVO - para confirmação de email