feat: Implement Minimum Viable Calm (MVC) feature and initial tests

src/dashboard/models/calm.py

@@ -0,0 +1,60 @@
+
+from datetime import datetime, date
+from enum import Enum as PyEnum
+from sqlalchemy import (
+    Column, Integer, String, DateTime, Boolean, Enum as SQLEnum,
+    Date, ForeignKey, Index, JSON
+)
+from sqlalchemy.orm import relationship
+from .database import Base  # Assuming a shared Base in models/database.py
+
+class TaskState(str, PyEnum):
+    LATER = "LATER"
+    NEXT = "NEXT"
+    NOW = "NOW"
+    DONE = "DONE"
+    DEFERRED = "DEFERRED" # Task pushed to tomorrow
+
+class TaskCertainty(str, PyEnum):
+    FUZZY = "FUZZY" # An intention without a time
+    SOFT = "SOFT"   # A flexible task with a time
+    HARD = "HARD"   # A fixed meeting/appointment
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False)
+    description = Column(String(1000), nullable=True)
+
+    state = Column(SQLEnum(TaskState), default=TaskState.LATER, nullable=False, index=True)
+    certainty = Column(SQLEnum(TaskCertainty), default=TaskCertainty.SOFT, nullable=False)
+    is_mit = Column(Boolean, default=False, nullable=False) # 1-3 per day
+
+    sort_order = Column(Integer, default=0, nullable=False)
+
+    # Time tracking
+    started_at = Column(DateTime, nullable=True)
+    completed_at = Column(DateTime, nullable=True)
+    deferred_at = Column(DateTime, nullable=True)
+
+    # Timestamps
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+
+    __table_args__ = (Index('ix_task_state_order', 'state', 'sort_order'),)
+
+class JournalEntry(Base):
+    __tablename__ = "journal_entries"
+
+    id = Column(Integer, primary_key=True, index=True)
+    entry_date = Column(Date, unique=True, nullable=False, index=True, default=date.today)
+
+    # Relationships to the 1-3 MITs for the day
+    mit_task_ids = Column(JSON, nullable=True)
+
+    evening_reflection = Column(String(2000), nullable=True)
+    gratitude = Column(String(500), nullable=True)
+    energy_level = Column(Integer, nullable=True)  # User-reported, 1-10
+
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)