feat: extend equipment and workout models with service tracking

internal/equipment/repoistory.go

@@ -3,6 +3,8 @@ package equipment
 import (
 	"errors"
 	"rideaware/pkg/database"
+	"time"
+
 	"gorm.io/gorm"
 )
 
@@ -53,4 +55,29 @@ func (r *Repository) UpdateEquipment(equipment *Equipment) error {
 func (r *Repository) DeleteEquipment(id, userID uint) error {
 	return database.DB.Where("id = ? AND user_id = ?", id, userID).
 		Delete(&Equipment{}).Error
+}
+
+// IncrementMileage atomically adds distance and duration to equipment totals.
+func (r *Repository) IncrementMileage(id, userID uint, distance float64, duration int) error {
+	return database.DB.Model(&Equipment{}).
+		Where("id = ? AND user_id = ?", id, userID).
+		Updates(map[string]interface{}{
+			"total_distance":         gorm.Expr("total_distance + ?", distance),
+			"total_duration":         gorm.Expr("total_duration + ?", duration),
+			"total_rides":            gorm.Expr("total_rides + 1"),
+			"distance_since_service": gorm.Expr("distance_since_service + ?", distance),
+			"duration_since_service": gorm.Expr("duration_since_service + ?", duration),
+		}).Error
+}
+
+// ResetServiceCounters resets the service tracking counters after servicing.
+func (r *Repository) ResetServiceCounters(id, userID uint) error {
+	now := time.Now()
+	return database.DB.Model(&Equipment{}).
+		Where("id = ? AND user_id = ?", id, userID).
+		Updates(map[string]interface{}{
+			"distance_since_service": 0,
+			"duration_since_service": 0,
+			"last_service_date":      now,
+		}).Error
 }