Weekdays that fit the weather columns, the top bar's own abbreviation, tile texts that fit, and a check that measures them

- The CYD's weather columns hold two letters beside the icon: every language has its own two-letter days (the CLDR's
  short width, Polish nd pn wt); French mar became nar there. check fails on a longer one.
- The top bar takes the language's abbreviation (sam. 19 sept., Sa., 19. Sept.), English keeps Sa 19 Sep.
- The editor's clock and date follow the screens: 7:05 PM in the top bar, 7:05 on the clock card.
- A long weather word ends in an ellipsis before the days.
- Tile lines that were cut on a screen are shorter (Zum Öffnen, Ouvrir, Otwórz, Sin imagen, ...); check measures
  them with the screens' font against the tile width of both boards.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

screen_manager/translations/es.json

@@ -50,13 +50,13 @@
         "sáb"
       ],
       "weekdays_min": [
-        "dom",
-        "lun",
-        "mar",
-        "mié",
-        "jue",
-        "vie",
-        "sáb"
+        "do",
+        "lu",
+        "ma",
+        "mi",
+        "ju",
+        "vi",
+        "sá"
       ],
       "months": [
         "enero",
@@ -214,7 +214,7 @@
     },
     "media": {
       "muted": "Silenciado",
-      "not_playing": "No se reproduce nada",
+      "not_playing": "Inactivo",
       "loading": "Cargando"
     },
     "timer": {
@@ -246,7 +246,7 @@
       "live": "En directo",
       "recording": "Grabando",
       "tap_to_view": "Toca para ver",
-      "no_image_yet": "Aún no hay imagen"
+      "no_image_yet": "Sin imagen"
     },
     "calibration": {
       "title": "Sigue la calibración",