feat: Enhance configuration handling and UI for job management

- Update .gitignore to include new provider files and ensure proper tracking.
- Refactor job and config forms to support multiple configuration selections, improving user experience.
- Implement logic to handle the initialization of skipProcessedFiles with a default value.
- Add new provider form templates for better organization and management of source and destination configurations.
- Enhance tests for provider forms and job configurations to ensure robust functionality.
- Introduce nullable handling for skipProcessedFiles in the database schema and update related migrations.
- Improve error handling and validation in job creation and editing processes.

internal/db/db.go

@@ -104,7 +104,7 @@ type TransferConfig struct {
 	ArchiveEnabled         bool   `gorm:"default:false" form:"archive_enabled"`
 	RcloneFlags            string `form:"rclone_flags"`
 	DeleteAfterTransfer    bool   `gorm:"default:false" form:"delete_after_transfer"`
-	SkipProcessedFiles     bool   `gorm:"default:true" form:"skip_processed_files"`
+	SkipProcessedFiles     *bool  `gorm:"default:true" form:"skip_processed_files"`
 	MaxConcurrentTransfers int    `gorm:"default:4" form:"max_concurrent_transfers"` // Number of concurrent file transfers
 	CreatedBy              uint
 	User                   User `gorm:"foreignkey:CreatedBy"`
@@ -831,6 +831,9 @@ func (db *DB) GenerateRcloneConfig(config *TransferConfig) error {
 }
 
 func (db *DB) GetActiveJobs() ([]Job, error) {
+	if db.DB == nil {
+		return nil, fmt.Errorf("database connection is nil")
+	}
 	var jobs []Job
 	err := db.Preload("Config").Where("enabled = ?", true).Find(&jobs).Error
 	return jobs, err
@@ -862,3 +865,16 @@ func (db *DB) GetConfigsForJob(jobID uint) ([]TransferConfig, error) {
 
 	return configs, nil
 }
+
+// GetSkipProcessedFiles returns the value of SkipProcessedFiles with a default if nil
+func (tc *TransferConfig) GetSkipProcessedFiles() bool {
+	if tc.SkipProcessedFiles == nil {
+		return true // Default to true if not set
+	}
+	return *tc.SkipProcessedFiles
+}
+
+// SetSkipProcessedFiles sets the SkipProcessedFiles field
+func (tc *TransferConfig) SetSkipProcessedFiles(value bool) {
+	tc.SkipProcessedFiles = &value
+}