Implement resume, skip, and stage selection

internal/app/run_control_test.go

@@ -0,0 +1,42 @@
+package app
+
+import (
+	"testing"
+	"time"
+
+	"gitea.maximumdirect.net/eric/narratio/internal/manifest"
+)
+
+func TestFirstNonSucceededIndex(t *testing.T) {
+	stages := BuildFullPlan()
+	m := manifest.New("2026-05-03", time.Now().UTC())
+	m.MarkStageSucceeded("prepare", time.Now().UTC(), nil)
+	m.MarkStageSucceeded("transcribe", time.Now().UTC(), nil)
+
+	got := firstNonSucceededIndex(stages, m)
+	if got != 2 {
+		t.Fatalf("firstNonSucceededIndex() = %d, want 2", got)
+	}
+}
+
+func TestDecideStageActions(t *testing.T) {
+	stages := BuildFullPlan()[:2]
+	m := manifest.New("2026-05-03", time.Now().UTC())
+	m.MarkStageSucceeded("prepare", time.Now().UTC(), nil)
+
+	got := decideStageActions(stages, m, false)
+	if len(got) != 2 {
+		t.Fatalf("len(decisions) = %d, want 2", len(got))
+	}
+	if got[0].Action != stageActionSkip {
+		t.Fatalf("prepare action = %q, want %q", got[0].Action, stageActionSkip)
+	}
+	if got[1].Action != stageActionRun {
+		t.Fatalf("transcribe action = %q, want %q", got[1].Action, stageActionRun)
+	}
+
+	forced := decideStageActions(stages, m, true)
+	if forced[0].Action != stageActionRun {
+		t.Fatalf("forced prepare action = %q, want %q", forced[0].Action, stageActionRun)
+	}
+}