Refactor error handling in FalukantService and enhance user feedback in HealthView

- Changed error throwing in FalukantService to use PreconditionError for better clarity.
- Added translations for "too close" error in both German and English locales.
- Improved user feedback in HealthView by displaying error messages in a dialog upon measure execution failure.

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

@@ -918,6 +918,9 @@
             "success": "Erfolg",
             "selectMeasure": "Maßnahme",
             "perform": "Durchführen",
+            "errors": {
+                "tooClose": "Aktionen zu dicht hintereinander (maximal 1× pro 24 Stunden)."
+            },
             "measures": {
                 "pill": "Tablette",
                 "doctor": "Arztbesuch",

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

@@ -100,6 +100,12 @@
             "bad": "Bad",
             "very_bad": "Very bad"
         },
+        "healthview": {
+            "title": "Health",
+            "errors": {
+                "tooClose": "Actions too close together (max once per 24 hours)."
+            }
+        },
         "moneyHistory": {
             "title": "Money history",
             "filter": "Filter",