feat(VocabService, localization, VocabLessonView): extend assistant wait feedback and timeout duration

- Increased the timeout duration for the language assistant from 30 seconds to 120 seconds to accommodate longer processing times.
- Added new localization strings across multiple languages (Cebuano, German, English, Spanish, French) to provide user feedback during the assistant's wait period, enhancing clarity and user experience.
- Implemented a visual waiting indicator in VocabLessonView to inform users that the assistant is still processing their request, improving overall interaction quality.

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

@@ -715,6 +715,9 @@
                 "languageAssistantInputPlaceholder": "Ask a leksiyon question o write imong own sentence para sa tamaion.",
                 "languageAssistantSend": "Padal-a ang aron katabang",
                 "languageAssistantSending": "Getting answer ...",
+                "languageAssistantWaitingTitle": "Ang pinulongan katabang is still working.",
+                "languageAssistantWaitingBody": "Local models sama sa Ollama can take a few seconds, especially kung loading pa ang model.",
+                "languageAssistantWaitingElapsed": "Waiting time: {seconds} s",
                 "languageAssistantError": "Ang pinulongan katabang could not answer right now.",
                 "languageAssistantPresetExplainStart": "Palihog explain ang main patterns ug grammar sa ang leksiyon",
                 "languageAssistantPatternHint": "Focus especially sa kini nga pattern",

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

@@ -697,6 +697,9 @@
                 "languageAssistantInputPlaceholder": "Stelle eine Frage zur Lektion oder schreibe einen eigenen Satz zum Korrigieren.",
                 "languageAssistantSend": "An Sprachassistent senden",
                 "languageAssistantSending": "Antwort wird geholt ...",
+                "languageAssistantWaitingTitle": "Der Sprachassistent arbeitet noch.",
+                "languageAssistantWaitingBody": "Lokale Modelle wie Ollama brauchen manchmal einige Sekunden, besonders wenn das Modell erst geladen wird.",
+                "languageAssistantWaitingElapsed": "Wartezeit: {seconds} s",
                 "languageAssistantError": "Der Sprachassistent konnte gerade nicht antworten.",
                 "languageAssistantPresetExplainStart": "Erkläre mir bitte die wichtigsten Muster und die Grammatik in der Lektion",
                 "languageAssistantPatternHint": "Nutze dabei besonders dieses Muster",

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

@@ -697,6 +697,9 @@
                 "languageAssistantInputPlaceholder": "Ask a lesson question or write your own sentence for correction.",
                 "languageAssistantSend": "Send to assistant",
                 "languageAssistantSending": "Getting answer ...",
+                "languageAssistantWaitingTitle": "The language assistant is still working.",
+                "languageAssistantWaitingBody": "Local models like Ollama can take a few seconds, especially while the model is loading.",
+                "languageAssistantWaitingElapsed": "Waiting time: {seconds}s",
                 "languageAssistantError": "The language assistant could not answer right now.",
                 "languageAssistantPresetExplainStart": "Please explain the main patterns and grammar in the lesson",
                 "languageAssistantPatternHint": "Focus especially on this pattern",

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

@@ -681,6 +681,9 @@
                 "languageAssistantInputPlaceholder": "Haz una pregunta sobre la lección o escribe tu propia frase para corregirla.",
                 "languageAssistantSend": "Enviar al asistente",
                 "languageAssistantSending": "Obteniendo respuesta ...",
+                "languageAssistantWaitingTitle": "El asistente sigue trabajando.",
+                "languageAssistantWaitingBody": "Los modelos locales como Ollama pueden tardar unos segundos, especialmente mientras se carga el modelo.",
+                "languageAssistantWaitingElapsed": "Tiempo de espera: {seconds} s",
                 "languageAssistantError": "El asistente no pudo responder ahora mismo.",
                 "languageAssistantPresetExplainStart": "Explícame por favor los patrones y la gramática principales de la lección",
                 "languageAssistantPatternHint": "Concéntrate especialmente en este patrón",

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

@@ -681,6 +681,9 @@
                 "languageAssistantInputPlaceholder": "Posez une question sur la leçon ou écrivez votre propre phrase à corriger.",
                 "languageAssistantSend": "Envoyer à l'assistant vocal",
                 "languageAssistantSending": "La réponse sera récupérée...",
+                "languageAssistantWaitingTitle": "L'assistant vocal travaille encore.",
+                "languageAssistantWaitingBody": "Les modèles locaux comme Ollama peuvent prendre quelques secondes, surtout lorsque le modèle est en cours de chargement.",
+                "languageAssistantWaitingElapsed": "Temps d'attente : {seconds} s",
                 "languageAssistantError": "L'assistant vocal ne pouvait pas répondre pour le moment.",
                 "languageAssistantPresetExplainStart": "Veuillez m'expliquer les modèles et la grammaire les plus importants de la leçon.",
                 "languageAssistantPatternHint": "Utilisez ce modèle en particulier",