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/fourier.html

@@ -68,16 +68,16 @@
 			}
 		</style>
   <br>
-  <p><b>Zeit-/Frequenzdomäne</b></p>
-  <p>Im folgenden Applett kann man das ausprobieren: Mit den Frequenzreglern kann man die Amplitude der einzelnen Sinusschwingungen erhöhen. Mit dem Preset "Rechteck" kann man sehen, dass ein Rechteck aus vielen Sinusschwingungen besteht.</p>
+  <p><b>Tids- och frekvensdomän</b></p>
+  <p>I följande applet kan du prova detta: Med frekvensreglagen kan du öka amplituden för de enskilda sinussvängningarna. Med förinställningen ”Fyrkant” ser du att en fyrkantvåg består av många sinussvängningar.</p>
 	  <div id="presets">
-	    Presets: 
+	    Förinställningar: 
 	  </div>
 	  <div id="cameraPresets">
-	    Ansicht: 
+	    Vy: 
 	  </div>
 	  <div id="numberOfFreqs">
-	    Anzahl Frequenzen:
+	    Antal frekvenser:
 	    <input type="range" id="numOfFreqs" min=1 max=30 value=9>
 	  </div>
 	  <div>
@@ -112,7 +112,7 @@
           phases: []
         },
         {
-          label: "Rechteck", 
+          label: "Fyrkant", 
           defaultAmplitude: 0,
           amplitudes: amplitudesSquare,
           defaultPhase: 0,
@@ -124,8 +124,8 @@
       
       const cameraPresets = [
         { label: "Standard", camera: 0, d: 3, theta: 90, phi: 48 },
-        { label: "Zeit", camera: 0, d: 3, theta: 20, phi: 48 },
-        { label: "Frequenz", camera: 0, d: 3, theta: 160, phi: 48 },
+        { label: "Tid", camera: 0, d: 3, theta: 20, phi: 48 },
+        { label: "Frekvens", camera: 0, d: 3, theta: 160, phi: 48 },
 //        { label: "Zeit", camera: 1, d: 1, theta: 90, phi: 40 },
 //        { label: "Frequenz", camera: 1, d: 1, theta: 90, phi: 0 }
       ];
@@ -240,7 +240,7 @@
       
       function initFreqInput(norender = false) {
         const inputEl = document.getElementById("input");
-        inputEl.innerHTML = '<div class="head"></div><div class="head">Amplitude</div><div class="head">Phase</div>';
+        inputEl.innerHTML = '<div class="head"></div><div class="head">Amplitud</div><div class="head">Fas</div>';
         for (var i = 0; i < numOfFreqs; i++) {
           const labelEl = document.createElement("div");
           inputEl.appendChild(labelEl);