Swedish adaptation: Instegscertifikat and HAREC content

- Sections and slides rewritten in Swedish; German law and institutions replaced by
  Swedish/CEPT/ITU equivalents (PTS, SSA, PTSFS 2025:1, SSMFS 2008:18), unverified
  statements marked "% TODO VERIFY"
- New toc: INSTEG, HAREC, UPPGRADERING; section idents are Swedish (see ident-map.tsv)
- Exam-question tags, BNetzA question pool, solutions and the German SWL course removed
- Static pages, snippets, applets, READMEs and image alt-texts translated
- TikZ labels translated; SVG drawings regenerated (drawing 689 still fails to build
  upstream: it references a missing photo)
- Changed from the original: not endorsed by DARC e.V., SSA or PTS

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

contents/html/greyline.html

@@ -4,14 +4,14 @@
 <p>
   <div id="mapbox" width="100%">
     <canvas id="map">
-        Your browser does not support HTML5 canvas.
+        Din webbläsare stöder inte HTML5 canvas.
     </canvas>
 </div>
 </p>
-Aktuelle Zeit: <div id="twl" style="display:inline-block;">time</div>
+Aktuell tid: <div id="twl" style="display:inline-block;">time</div>
 <div id="slidebox" style="width: 100%;">
     <input type="range" class="slider" value="0" min="0" max="24" id="time" style="width: 100%;">
-    <button onclick="drawDayNightMap(true)">Zurücksetzen</button>
+    <button onclick="drawDayNightMap(true)">Återställ</button>
 </div>
 
 <script>
@@ -901,7 +901,7 @@ Aktuelle Zeit: <div id="twl" style="display:inline-block;">time</div>
             date = new Date(current.getUTCFullYear(),current.getUTCMonth(),current.getDate(),hours,minutes)
         }
         performCalculations(date);
-        $('#twl').html(date);
+        $('#twl').html(date.toLocaleString('sv-SE'));
     
         var northSun = DECsun >= 0;
         var startFrom = northSun? 0: (mapHeight - 1);