feat(bisaya-course): restructure core patterns and enhance vocabulary preparation

- Updated core patterns in various scripts to use an object format with target phrases and glosses, improving clarity and usability for learners.
- Enhanced the VocabService to normalize core pattern entries, ensuring consistent handling of vocabulary data.
- Introduced new vocabulary preparation steps in the VocabLessonView, guiding users through active review processes before engaging with the vocabulary trainer.
- Added localization support for new vocabulary preparation hints and instructions in multiple languages, enhancing user experience across the application.

frontend/src/i18n/locales/de/socialnetwork.json

@@ -447,6 +447,14 @@
                 "grammarImpulse": "Grammatik-Impuls",
                 "learningGoals": "Lernziele",
                 "corePatterns": "Kernmuster",
+                "corePatternsHint": "Zuerst die Zielsprache lesen, darunter die deutsche Bedeutung — so lernst du jedes Muster bewusst in beiden Richtungen.",
+                "vocabPrepTitle": "Vorbereitung vor dem Vokabeltrainer",
+                "vocabPrepStep1": "Lies Kernmuster und Wortliste (Deutsch ↔ Zielsprache) einmal in Ruhe durch.",
+                "vocabPrepConfirm1": "Erste Durchsicht erledigt",
+                "vocabPrepStep2": "Gehe die gleichen Begriffe noch einmal durch (aktive Wiederholung, ohne zu üben).",
+                "vocabPrepConfirm2": "Zweite Durchsicht erledigt",
+                "vocabPrepReady": "Du kannst jetzt mit dem Vokabeltrainer starten.",
+                "vocabTrainerLockedHint": "Bitte bestätige zuerst zwei Lern-Durchgänge bei „Vorbereitung vor dem Vokabeltrainer“.",
                 "speakingTasks": "Sprechaufträge",
                 "speakingPrompt": "Sprechauftrag",
                 "practicalTasks": "Praxisaufgaben",

frontend/src/i18n/locales/en/socialnetwork.json

@@ -447,6 +447,14 @@
                 "grammarImpulse": "Grammar Focus",
                 "learningGoals": "Learning Goals",
                 "corePatterns": "Core Patterns",
+                "corePatternsHint": "Read the target language first, then the meaning below — you learn each pattern both ways.",
+                "vocabPrepTitle": "Preparation before the vocabulary trainer",
+                "vocabPrepStep1": "Read through core patterns and the word list (native language ↔ target language) once.",
+                "vocabPrepConfirm1": "First pass done",
+                "vocabPrepStep2": "Go through the same items again (active review, not testing yet).",
+                "vocabPrepConfirm2": "Second pass done",
+                "vocabPrepReady": "You can start the vocabulary trainer now.",
+                "vocabTrainerLockedHint": "Please confirm two preparation steps under “Preparation before the vocabulary trainer” first.",
                 "speakingTasks": "Speaking Tasks",
                 "speakingPrompt": "Speaking Prompt",
                 "practicalTasks": "Practical Tasks",

frontend/src/i18n/locales/es/socialnetwork.json

@@ -445,6 +445,14 @@
                 "grammarImpulse": "Impulso gramatical",
                 "learningGoals": "Objetivos",
                 "corePatterns": "Patrones básicos",
+                "corePatternsHint": "Primero la lengua meta; debajo, el significado en tu idioma.",
+                "vocabPrepTitle": "Preparación antes del entrenador de vocabulario",
+                "vocabPrepStep1": "Lee una vez los patrones clave y la lista de palabras (idioma nativo ↔ lengua meta).",
+                "vocabPrepConfirm1": "Primera lectura hecha",
+                "vocabPrepStep2": "Repasa los mismos elementos otra vez (repaso activo, aún sin practicar).",
+                "vocabPrepConfirm2": "Segunda lectura hecha",
+                "vocabPrepReady": "Ya puedes iniciar el entrenador de vocabulario.",
+                "vocabTrainerLockedHint": "Confirma primero los dos pasos de preparación arriba.",
                 "speakingTasks": "Tareas orales",
                 "speakingPrompt": "Tarea oral",
                 "practicalTasks": "Tareas prácticas",