fix: prevent pronouns/function words from being detected as vocabulary

- fuzzyMatch threshold 0.6 → 0.85 (man/Mann 0.75 now fails)
- min token length 2 → 4 (excludes man, der, die, das, ich, wir...)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/ContentCreation.jsx

@@ -77,7 +77,7 @@ async function resolvePlaceholders(text, allObjects) {
 
 // ─── Fuzzy word matching ──────────────────────────────────────────────────────
 
-function fuzzyMatch(token, wordTitle, threshold = 0.6) {
+function fuzzyMatch(token, wordTitle, threshold = 0.85) {
   const t = token.toLowerCase();
   const w = wordTitle.toLowerCase();
   if (!t.startsWith(w) && !w.startsWith(t)) return false;
@@ -234,7 +234,7 @@ function PairForm({ objectId, allObjects, onPairSaved }) {
     if (!allText.trim()) { setWordMap({}); return; }
     const t = setTimeout(async () => {
       try {
-        const tokens = [...new Set(allText.split(/[\s.,!?;:()\[\]"']+/).filter(w => w.length >= 2))];
+        const tokens = [...new Set(allText.split(/[\s.,!?;:()\[\]"']+/).filter(w => w.length >= 4))];
         if (!tokens.length) return;
         const results = await Promise.allSettled(
           tokens.map(async w => {
@@ -532,7 +532,7 @@ function EditPairForm({ pair, allObjects, onSaved, onCancel, onDeleted }) {
     if (!allText.trim()) { setWordMap({}); return; }
     const t = setTimeout(async () => {
       try {
-        const tokens = [...new Set(allText.split(/[\s.,!?;:()\[\]"']+/).filter(w => w.length >= 2))];
+        const tokens = [...new Set(allText.split(/[\s.,!?;:()\[\]"']+/).filter(w => w.length >= 4))];
         if (!tokens.length) return;
         const results = await Promise.allSettled(
           tokens.map(async w => {