Fix: Umlaute einbeziehen Funktionalität repariert

- HTML: name-Attribut und form-Attribut zur Umlaute-Checkbox hinzugefügt
- Backend: use_umlaut Parameter zur Form-Verarbeitung hinzugefügt
- Backend: Umlaute-Filterung in filter_words() Funktion implementiert
- Backend: use_umlaut Variable an Template weitergegeben
- JavaScript: applyFilters() Funktion für Umlaute-Checkbox erweitert

Die Umlaute einbeziehen Option funktioniert jetzt korrekt sowohl
auf Backend- als auch Frontend-Ebene.

app.py

@@ -209,7 +209,7 @@ def load_words() -> Tuple[List[str], Dict[str, List[str]]]:
 	return words, sources_map
 
 
-def filter_words(words: List[str], position_letters: List[str], includes_text: str, excludes_text: str) -> List[str]:
+def filter_words(words: List[str], position_letters: List[str], includes_text: str, excludes_text: str, use_umlaut: bool = True) -> List[str]:
 	results: List[str] = []
 	includes_letters = [ch for ch in includes_text.lower() if ch.isalpha()]
 	excludes_letters = [ch for ch in excludes_text.lower() if ch.isalpha()]
@@ -223,6 +223,9 @@ def filter_words(words: List[str], position_letters: List[str], includes_text: s
 		# darf-nicht-enthalten
 		if any(ch in word for ch in excludes_letters):
 			continue
+		# Umlaute-Filter
+		if not use_umlaut and ('ä' in word or 'ö' in word or 'ü' in word or 'ß' in word):
+			continue
 		results.append(word)
 	return results
 
@@ -242,6 +245,7 @@ def index():
 	excludes: str = ""
 	use_ot: bool = True
 	use_wf: bool = False
+	use_umlaut: bool = True
 	if request.method == "POST":
 		pos = [
 			(request.form.get("pos1") or "").strip().lower(),
@@ -254,6 +258,7 @@ def index():
 		excludes = (request.form.get("excludes") or "").strip()
 		use_ot = request.form.get("use_ot") is not None
 		use_wf = request.form.get("use_wf") is not None
+		use_umlaut = request.form.get("use_umlaut") is not None
 		# Falls keine Quelle gewählt ist, standardmäßig OpenThesaurus aktivieren
 		if not use_ot and not use_wf:
 			use_ot = True
@@ -264,12 +269,13 @@ def index():
 			'includes': includes,
 			'excludes': excludes,
 			'use_ot': use_ot,
-			'use_wf': use_wf
+			'use_wf': use_wf,
+			'use_umlaut': use_umlaut
 		}
 		log_search_query(search_params, request.headers.get('User-Agent'))
 
 		# 1) Buchstaben-/Positionssuche über alle Wörter
-		matched = filter_words(all_words, pos, includes, excludes)
+		matched = filter_words(all_words, pos, includes, excludes, use_umlaut)
 		# 2) Quellen-Filter nur auf Ergebnisansicht anwenden
 		allowed = set()
 		if use_ot:
@@ -291,6 +297,7 @@ def index():
 		sources_map=sources_map,
 		use_ot=use_ot,
 		use_wf=use_wf,
+		use_umlaut=use_umlaut,
 		error_message=None,
 	)
 

templates/index.html

@@ -154,7 +154,7 @@
                     <fieldset class="filter-box" role="group">
                         <legend>Umlaute</legend>
                         <div class="inline-controls">
-                            <label><input id="filter-umlaut" type="checkbox" /> Umlaute einbeziehen (ä, ö, ü, ß)</label>
+                            <label><input id="filter-umlaut" type="checkbox" name="use_umlaut" form="search-form" {% if use_umlaut %}checked{% endif %}/> Umlaute einbeziehen (ä, ö, ü, ß)</label>
                         </div>
                     </fieldset>
                     <div class="results-box">
@@ -228,7 +228,7 @@
             var ot = document.getElementById('filter-ot');
             var wf = document.getElementById('filter-wf');
             var uml = document.getElementById('filter-umlaut');
-            if (!ot || !wf) return;
+            if (!ot || !wf || !uml) return;
             var allowed = [];
             if (ot.checked) allowed.push('ot');
             if (wf.checked) allowed.push('wf');