fix(live-log): prevent freeze without GPS and prompt for day-start position

Harden geolocation with watchdog timeouts and permission checks so
desktop browsers without GPS no longer hang Live-Log. Show a hint to
log a position when none exists for the day.

Return 503 when crew-pool Prisma models are missing instead of crashing.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/i18n/locales/da.json

@@ -268,6 +268,7 @@
       "live_comment_placeholder": "Indtast tekst…",
       "live_comment_confirm": "Indtast",
       "live_gps_error": "GPS-position kunne ikke bestemmes.",
+      "live_gps_start_hint": "Begynd altid dagens rejse med en position.",
       "live_event_generic": "Hændelse",
       "live_weather_btn": "Vejr",
       "live_weather_owm_btn": "Hent OpenWeatherMap-vejr",

client/src/i18n/locales/de.json

@@ -268,6 +268,7 @@
       "live_comment_placeholder": "Freitext eingeben…",
       "live_comment_confirm": "Eintragen",
       "live_gps_error": "GPS-Position konnte nicht ermittelt werden.",
+      "live_gps_start_hint": "Beginne deine Tagesreise immer mit einem Standort.",
       "live_event_generic": "Ereignis",
       "live_weather_btn": "Wetter",
       "live_weather_owm_btn": "OpenWeatherMap Wetter abrufen",

client/src/i18n/locales/en.json

@@ -268,6 +268,7 @@
       "live_comment_placeholder": "Enter text…",
       "live_comment_confirm": "Log entry",
       "live_gps_error": "Could not determine GPS position.",
+      "live_gps_start_hint": "Always start your day's voyage with a position fix.",
       "live_event_generic": "Event",
       "live_weather_btn": "Weather",
       "live_weather_owm_btn": "Fetch OpenWeatherMap weather",

client/src/i18n/locales/nb.json

@@ -268,6 +268,7 @@
       "live_comment_placeholder": "Skriv inn tekst…",
       "live_comment_confirm": "Loggfør",
       "live_gps_error": "GPS-posisjon kunne ikke bestemmes.",
+      "live_gps_start_hint": "Start alltid dagsreisen med en posisjon.",
       "live_event_generic": "Hendelse",
       "live_weather_btn": "Vær",
       "live_weather_owm_btn": "Hent OpenWeatherMap-vær",

client/src/i18n/locales/sv.json

@@ -268,6 +268,7 @@
       "live_comment_placeholder": "Ange text…",
       "live_comment_confirm": "Logga",
       "live_gps_error": "GPS-position kunde inte bestämmas.",
+      "live_gps_start_hint": "Börja alltid dagsresan med en position.",
       "live_event_generic": "Händelse",
       "live_weather_btn": "Väder",
       "live_weather_owm_btn": "Hämta OpenWeatherMap-väder",