Rank badges and level equipment; no edge scrolling before the mouse has moved

- Military rank badges instead of level numbers: Lv 2-4 bronze chevrons, Lv 5-7 silver bars,
  Lv 8-9 gold stars, Lv 10 gold star in a wreath; rank names in the unit info (EN/DE)
- Equipment grows with the level: shoulder pieces (bronze/silver/gold), helmets with horns
  (creatures) or plumes (heroes), capes from Lv 7, glowing ring from Lv 9, aura at Lv 10
- Fix: before the first mouse move the pointer counts as (0, 0) and the edge scrolling
  moved the camera at the start and after loading a savegame

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/de.lang

@@ -504,3 +504,16 @@ camp.m20.story = Großmeister Valerian Hellschild erwartet dich in seiner Zitade
 camp.epilogue = Der letzte Splitter versinkt im Kern, und die Dunkelheit atmet wieder. Irgendwo dort oben schreibt der Orden der Lichtwacht einen sehr langen Bericht. | Krummfinger hat Tee gekocht. Du bist wieder ganz, Meister. Das Unterreich gehört dir.
 lair.arrivals = {0} freie Plätze: Neue Kreaturen kommen mit {1}% Tempo
 job.help = Hilft mit
+
+# ranks (levels 1-10)
+info.rank = Dienstgrad: {0}
+rank.1 = Rekrut
+rank.2 = Gefreiter
+rank.3 = Obergefreiter
+rank.4 = Korporal
+rank.5 = Feldwebel
+rank.6 = Oberfeldwebel
+rank.7 = Hauptfeldwebel
+rank.8 = Hauptmann
+rank.9 = Oberst
+rank.10 = Feldherr