feat: define all 8 SQLModel tables

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

app/models/user.py

@@ -0,0 +1,39 @@
+"""User model for profile management.
+
+Stores admin and regular user profiles with physical stats and goals.
+"""
+
+from datetime import datetime
+from typing import Optional
+
+from sqlmodel import Field, SQLModel
+
+
+class User(SQLModel, table=True):
+    """A user profile in the system.
+
+    Attributes:
+        id: Primary key, auto-incremented.
+        username: Unique login identifier.
+        password_hash: bcrypt-hashed password (admin only initially).
+        display_name: Human-readable name shown in the UI.
+        height: User's height as a string (e.g., "6'0\"").
+        weight: User's weight as a string (e.g., "260 lbs").
+        goals: Free-text training goals.
+        is_admin: Whether this user has admin privileges.
+        created_at: Timestamp when the record was created.
+        updated_at: Timestamp of the last update.
+    """
+
+    __tablename__ = "users"
+
+    id: Optional[int] = Field(default=None, primary_key=True)
+    username: str = Field(index=True, unique=True)
+    password_hash: str = Field(default="")
+    display_name: str = Field(default="")
+    height: Optional[str] = Field(default=None)
+    weight: Optional[str] = Field(default=None)
+    goals: Optional[str] = Field(default=None)
+    is_admin: bool = Field(default=False)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)