feat(VocabPracticeDialog): implement SRS session management and enhance UI feedback

- Added support for spaced repetition system (SRS) session management, allowing users to resume practice sessions with due items.
- Introduced new UI elements to display SRS session status, including total due, completed, and remaining items.
- Enhanced localization for SRS-related messages in multiple languages, improving user experience and clarity.
- Updated methods for saving and loading SRS session data to local storage, ensuring persistence across sessions.

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

@@ -124,6 +124,32 @@
             "children": "Children",
             "children_unbaptised": "Unbaptised children"
         },
+        "genderAge": {
+            "ageGroups": "infant:2|toddler:4|child:12|teen:18|youngAdult:25|adult:50|mature:70|elder:999",
+            "neutral": {
+                "child": "Child"
+            },
+            "male": {
+                "infant": "Baby boy",
+                "toddler": "Toddler",
+                "child": "Boy",
+                "teen": "Young man",
+                "youngAdult": "Young man",
+                "adult": "Man",
+                "mature": "Older man",
+                "elder": "Elder"
+            },
+            "female": {
+                "infant": "Baby girl",
+                "toddler": "Toddler",
+                "child": "Girl",
+                "teen": "Young woman",
+                "youngAdult": "Young woman",
+                "adult": "Woman",
+                "mature": "Older woman",
+                "elder": "Elder"
+            }
+        },
         "overview": {
             "title": "Falukant - Overview",
             "heroIntro": "Your status in economy, family and property in a condensed overview.",