feat: define browser domain and application contracts

internal/application/browser_manager.go

@@ -0,0 +1,55 @@
+package application
+
+import (
+	"context"
+	"time"
+
+	"chub/internal/domain"
+)
+
+type BrowserManager interface {
+	Start(context.Context, domain.LaunchSpec) (domain.InstanceView, error)
+	List(context.Context) ([]domain.InstanceView, error)
+	Get(context.Context, string) (domain.InstanceView, error)
+	Stop(context.Context, string, bool) error
+	Restart(context.Context, string) (domain.InstanceView, error)
+}
+
+type EventSink func(domain.BrowserEvent)
+
+type ProcessHandle interface {
+	PID() int
+	Wait(context.Context) (int, error)
+}
+
+type ProcessLauncher interface {
+	Start(context.Context, domain.LaunchSpec) (ProcessHandle, error)
+}
+
+type ExecutableResolver interface {
+	Resolve(context.Context, domain.BrowserKind, string) (string, error)
+}
+
+type ProcessIdentity struct {
+	PID         int
+	Executable  string
+	CommandLine string
+	UserDataDir string
+}
+
+type ProcessInspector interface {
+	Inspect(context.Context, int) (ProcessIdentity, error)
+	Alive(context.Context, int) (bool, error)
+}
+
+type ProfileUse struct {
+	Occupied bool
+	PID      int
+	Source   string
+}
+
+type ProfileInspector interface {
+	Inspect(context.Context, string) (ProfileUse, error)
+}
+
+type Clock func() time.Time