T1.1: Create src/domain; move Job/RunRecord/Config/JobsFile/StartInTrayArgument

Extracts the five domain types out of src/core/model.go into a new
src/domain package (job.go, record.go, config.go). The unexported
nextDue field is promoted to NextDue so it is accessible from core.
All references across src/core, src/gui, and cmd/gosentry are updated
to use domain.TypeName. src/core/model.go is reduced to a bare package
declaration. Windows and Linux cross-compilation both pass; all tests
remain green.

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

src/domain/config.go

@@ -0,0 +1,25 @@
+package domain
+
+// StartInTrayArgument is written to the Windows Startup shortcut so autostart
+// can keep the scheduler running without flashing the main window. Manual
+// launches omit this flag and open the normal window.
+const StartInTrayArgument = "--start-in-tray"
+
+// Config is stored in gosentry.yaml next to the program. It contains only
+// application-level choices: where to read jobs from, where to write logs, and
+// how the desktop shell should behave.
+type Config struct {
+	JobsDir           string `yaml:"jobs_dir"`
+	LogsDir           string `yaml:"logs_dir"`
+	MaxLogFiles       int    `yaml:"max_log_files"`
+	MaxLogAgeDays     int    `yaml:"max_log_age_days"`
+	StartOnLogin      bool   `yaml:"start_on_login"`
+	KeepRunningInTray bool   `yaml:"keep_running_in_tray"`
+	NotifyOnFailure   bool   `yaml:"notify_on_failure"`
+}
+
+// JobsFile is the on-disk shape of jobs.yaml. Wrapping the slice in a top-level
+// object leaves room for future metadata without breaking the basic file format.
+type JobsFile struct {
+	Jobs []Job `yaml:"jobs"`
+}

src/domain/job.go

@@ -0,0 +1,30 @@
+package domain
+
+import "time"
+
+// Job is the user-visible scheduled command.
+//
+// Fields with yaml:"-" are deliberately runtime-only. They are useful in the GUI
+// while GoSentry is running, but writing them to jobs.yaml would make the jobs
+// file noisy and would mix durable configuration with transient execution state.
+type Job struct {
+	ID               int         `yaml:"id"`
+	Name             string      `yaml:"name"`
+	Folder           string      `yaml:"folder,omitempty"`
+	Schedule         string      `yaml:"schedule"`
+	Command          string      `yaml:"command"`
+	Arguments        string      `yaml:"arguments,omitempty"`
+	SuccessExitCodes string      `yaml:"success_exit_codes,omitempty"`
+	StartOnly        bool        `yaml:"start_only,omitempty"`
+	Enabled          bool        `yaml:"enabled"`
+	LastRun          string      `yaml:"-"`
+	NextRun          string      `yaml:"-"`
+	LastState        string      `yaml:"-"`
+	Logs             []RunRecord `yaml:"-"`
+	Output           string      `yaml:"-"`
+
+	// NextDue is kept as time.Time for scheduler comparisons. The formatted
+	// NextRun string above exists only for display in the GUI and YAML rewriting
+	// must not persist it.
+	NextDue time.Time `yaml:"-"`
+}

src/domain/record.go

@@ -0,0 +1,15 @@
+package domain
+
+// RunRecord represents one visible activity item. Scheduled and manual command
+// output is also written to a log file; the in-memory Output copy exists so the
+// latest run can be displayed without reopening the log on every repaint.
+type RunRecord struct {
+	Time    string `yaml:"time"`
+	JobID   int    `yaml:"job_id"`
+	JobName string `yaml:"job_name"`
+	Trigger string `yaml:"trigger,omitempty"`
+	State   string `yaml:"state"`
+	Detail  string `yaml:"detail"`
+	LogFile string `yaml:"log_file,omitempty"`
+	Output  string `yaml:"output,omitempty"`
+}