feat: Strava support — bulk-export .gz/.tcx import fix + .tcx parser; full Strava API OAuth live sync (activities via streams) with Profile connect UI; colour gym/no-GPS sports red

backend/app/models/user.py

@@ -45,6 +45,7 @@ class User(Base):
     named_routes = relationship("NamedRoute", back_populates="user", cascade="all, delete-orphan")
     weight_logs = relationship("WeightLog", back_populates="user", cascade="all, delete-orphan")
     garmin_connect_config = relationship("GarminConnectConfig", back_populates="user", uselist=False, cascade="all, delete-orphan")
+    strava_config = relationship("StravaConfig", back_populates="user", uselist=False, cascade="all, delete-orphan")
 
 
 class GarminConnectConfig(Base):
@@ -67,6 +68,27 @@ class GarminConnectConfig(Base):
     user = relationship("User", back_populates="garmin_connect_config")
 
 
+class StravaConfig(Base):
+    """Per-user Strava OAuth tokens and sync state. Tokens are Fernet-encrypted
+    (same SECRET_KEY scheme as Garmin credentials)."""
+    __tablename__ = "strava_configs"
+
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, unique=True, index=True)
+    athlete_id = Column(String(64), nullable=True)
+    athlete_name = Column(String(256), nullable=True)
+    access_token_enc = Column(String(512), nullable=False)
+    refresh_token_enc = Column(String(512), nullable=False)
+    expires_at = Column(DateTime(timezone=True), nullable=True)   # access-token expiry
+    sync_enabled = Column(Boolean, default=True)
+    sync_lookback_days = Column(Integer, default=30)   # -1 = all-time, first sync only
+    last_sync_at = Column(DateTime(timezone=True), nullable=True)
+    last_sync_status = Column(String(512), nullable=True)
+    created_at = Column(DateTime(timezone=True), default=now_utc)
+
+    user = relationship("User", back_populates="strava_config")
+
+
 class WeightLog(Base):
     """Manual weight entries separate from health_metrics for easy tracking."""
     __tablename__ = "weight_logs"