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/it.json

@@ -50,13 +50,13 @@
         "sab"
       ],
       "weekdays_min": [
-        "dom",
-        "lun",
-        "mar",
-        "mer",
-        "gio",
-        "ven",
-        "sab"
+        "do",
+        "lu",
+        "ma",
+        "me",
+        "gi",
+        "ve",
+        "sa"
       ],
       "months": [
         "gennaio",
@@ -214,7 +214,7 @@
     },
     "media": {
       "muted": "Muto",
-      "not_playing": "Nessuna riproduzione",
+      "not_playing": "Inattivo",
       "loading": "Caricamento"
     },
     "timer": {
@@ -246,7 +246,7 @@
       "live": "Dal vivo",
       "recording": "Registrazione",
       "tap_to_view": "Tocca per vedere",
-      "no_image_yet": "Ancora nessuna immagine"
+      "no_image_yet": "Niente immagine"
     },
     "calibration": {
       "title": "Segui la calibrazione",