fix(testrun): the refusal asks whether the generator drove, not whether anything did

A dead provider against folio exited 0 on a real emulator: the login
setup dispatched three actions before the generator was consulted, so
DispatchedActions was 3 and the gate never fired while the generator
drove the app zero times across 83 steps. Any spec with a login setup
was immune, which is the normal case.

Summary counts generator actions separately and the refusal reads that.
NoActionsDispatchedError becomes NoGeneratorActionsError, because a run
that dispatched three login taps was lying in the old name.

internal/runner/llm_source.go

@@ -64,11 +64,14 @@ type llmSource struct {
 	// can stamp the trace. lastSource is "llm" only when the LLM (not setup)
 	// chose the action; lastReasoning is the model's rationale. lastChoice is the
 	// 1-based number it picked and lastChosenAction the description it echoed, so
-	// the trace shows what the model believed it was doing.
+	// the trace shows what the model believed it was doing. lastFromSetup says
+	// the spec's setup produced the action, which is the app being put in
+	// position rather than the generator exploring it.
 	lastSource       string
 	lastReasoning    string
 	lastChoice       int
 	lastChosenAction string
+	lastFromSetup    bool
 }
 
 // llmSelection is the outcome of one LLM selection call.
@@ -95,12 +98,14 @@ func (s *llmSource) NextAction(ctx context.Context, stepIndex int) (verifier.Act
 	s.lastReasoning = ""
 	s.lastChoice = 0
 	s.lastChosenAction = ""
+	s.lastFromSetup = false
 	s.history.completeLast(s.verifier.CurrentScreen())
 
 	// Setup precedence only: the LLM replaces the seeded action root, so we run
 	// setup (e.g. login) first but never the weighted picker.
 	action, err := s.verifier.SetupAction()
 	if err == nil {
+		s.lastFromSetup = true
 		s.record(stepIndex, trace.LLMCall{Outcome: trace.LLMOutcomeSetupAction})
 		s.history.add(describeAction(action))
 		return action, nil
@@ -509,6 +514,16 @@ func stampActionSource(traceAction *trace.Action, source ActionSource) {
 	traceAction.LLMChosenAction = llm.lastChosenAction
 }
 
+// generatorChoseAction reports whether the action the source just returned came
+// from the generator rather than from the spec's setup driving the app into
+// position. Only the model source can tell them apart: the seeded picker
+// resolves setup precedence inside the one JS call it makes, so everything it
+// returns counts as the generator's.
+func generatorChoseAction(source ActionSource) bool {
+	llm, ok := source.(*llmSource)
+	return !ok || !llm.lastFromSetup
+}
+
 // screenshotDataURL downscales the PNG and encodes it as a data URL for the
 // image content part.
 func screenshotDataURL(pngBytes []byte, maxEdge int) (string, bool) {