feat: major feature updates and cleanup

- Add Redis architecture implementation
- Update browser extension functionality
- Clean up deprecated files and documentation
- Enhance backend handlers for auth, messages, search
- Add new configuration options and settings
- Update Docker and deployment configurations

backend/models/update_settings.go

@@ -0,0 +1,57 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// UserUpdateSettings stores user-specific update and OAuth configurations
+type UserUpdateSettings struct {
+	ID        uint           `json:"id" gorm:"primaryKey"`
+	CreatedAt time.Time      `json:"created_at"`
+	UpdatedAt time.Time      `json:"updated_at"`
+	DeletedAt gorm.DeletedAt `json:"-" gorm:"index"`
+
+	UserID uint `json:"user_id" gorm:"not null;uniqueIndex"`
+	User   User `json:"user,omitempty" gorm:"foreignKey:UserID"`
+
+	// OAuth Service Configuration
+	OAuthServiceURL string `json:"oauth_service_url" gorm:"default:https://oauth.trackeep.org"`
+
+	// Update Configuration
+	AutoUpdateCheck     bool   `json:"auto_update_check" gorm:"default:false"`
+	UpdateCheckInterval string `json:"update_check_interval" gorm:"default:24h"` // 1h, 6h, 12h, 24h, 168h
+	PrereleaseUpdates   bool   `json:"prerelease_updates" gorm:"default:false"`
+}
+
+// GetUserUpdateSettings retrieves update settings for a user
+func GetUserUpdateSettings(userID uint) (*UserUpdateSettings, error) {
+	var settings UserUpdateSettings
+	err := DB.Where("user_id = ?", userID).First(&settings).Error
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			// Create default settings
+			settings = UserUpdateSettings{
+				UserID:              userID,
+				OAuthServiceURL:     "https://oauth.trackeep.org",
+				AutoUpdateCheck:     false,
+				UpdateCheckInterval: "24h",
+				PrereleaseUpdates:   false,
+			}
+			// Save defaults
+			if err := DB.Create(&settings).Error; err != nil {
+				return nil, err
+			}
+			return &settings, nil
+		}
+		return nil, err
+	}
+	return &settings, nil
+}
+
+// SaveUserUpdateSettings saves update settings for a user
+func SaveUserUpdateSettings(userID uint, settings *UserUpdateSettings) error {
+	settings.UserID = userID
+	return DB.Where("user_id = ?", userID).Assign(settings).FirstOrCreate(settings).Error
+}