feat(quick-260329-tv5): show instruction text persistently in phase indicator

- setPhase("practice") now shows full instruction instead of "Ueben"
- setPhase("words") now shows full instruction instead of "Woerter"
- Removed 2500ms delay and companion text flicker in runPracticePhase
- Removed 2500ms delay and companion text flicker in runWordsPhase

src/ui/screens.ts

@@ -160,8 +160,9 @@ export function initLessonScreen(
 	function setPhase(phase: LessonPhase): void {
 		const labels: Record<LessonPhase, string> = {
 			discover: "Entdecken",
-			practice: "Üben",
-			words: "Wörter",
+			practice:
+				"Jetzt kannst du ueben! Druecke die Taste zu dem Buchstaben, der herunterfaellt.",
+			words: "Jetzt kommen ganze Woerter! Tippe die Buchstaben nacheinander ein.",
 		};
 		phaseIndicator.textContent = labels[phase];
 	}
@@ -471,12 +472,6 @@ export function initLessonScreen(
 
 	async function runPracticePhase(): Promise<void> {
 		setPhase("practice");
-		companionText.textContent =
-			"Jetzt kannst du ueben! Druecke die Taste zu dem Buchstaben, der herunterfaellt.";
-		companionArea.style.display = "flex";
-		await new Promise<void>((resolve) => setTimeout(resolve, 2500));
-		if (cancelled) return;
-		companionText.textContent = "";
 		const state = createExerciseState(level);
 		return new Promise<void>((resolve) => {
 			runLetterExercise(state, resolve);
@@ -485,12 +480,6 @@ export function initLessonScreen(
 
 	async function runWordsPhase(): Promise<void> {
 		setPhase("words");
-		companionText.textContent =
-			"Jetzt kommen ganze Woerter! Tippe die Buchstaben nacheinander ein.";
-		companionArea.style.display = "flex";
-		await new Promise<void>((resolve) => setTimeout(resolve, 2500));
-		if (cancelled) return;
-		companionText.textContent = "";
 		const wordCount = 4;
 		let words: string[];
 		if (isReview) {