fix: prompt ghost enrichi (contexte phrase) + trim espaces au Tab

- Mid-word: prompt avec contexte de la phrase + exemple
- acceptGhost: trim leading whitespace pour eviter double espace
- Prompt plus direct pour le modele 1.5B

frontend/editor-poc.html

@@ -1804,8 +1804,11 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
     var start = ta.selectionStart;
     var before = ta.value.slice(0, start);
     var after = ta.value.slice(start);
-    ta.value = before + _ghostText + after;
-    ta.setSelectionRange(start + _ghostText.length, start + _ghostText.length);
+    // Trim to avoid double spaces
+    var insert = _ghostText.replace(/^\s+/, '');
+    if (!insert) return;
+    ta.value = before + insert + after;
+    ta.setSelectionRange(start + insert.length, start + insert.length);
     clearGhost();
     ta.focus();
     markDirty();
@@ -1816,17 +1819,19 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
   function requestGhostCompletion() {
     var fullText = ta.value.slice(0, ta.selectionStart);
     if (fullText.trim().length < 1) return;
-    // Detect context: mid-word vs end of phrase
     var lastChar = fullText.slice(-1);
     var midWord = /[a-zA-Z0-9\u00C0-\u024F]$/.test(lastChar);
 
-    // For mid-word: extract the current word and ask AI to complete just it
     var prompt, inputText;
     if (midWord) {
       var wordMatch = fullText.match(/([\w\u00C0-\u024F]+)$/);
       var partialWord = wordMatch ? wordMatch[1] : fullText;
       inputText = partialWord;
-      prompt = 'Complete this word. Return ONLY the remaining letters (no spaces, no extra text): ' + partialWord;
+      // Provide surrounding context so the model can guess the word
+      var context = fullText.slice(0, -partialWord.length).trim();
+      prompt = 'Complete this French word. The word is: "' + partialWord +
+        '". Context: "' + (context || '(start of line)') +
+        '". Return ONLY the remaining letters of the word. Example: if word is "famil" return "ial" for "familial". Do NOT add spaces.';
     } else {
       inputText = fullText;
       prompt = 'Continue this text. Return ONLY the new text (do NOT repeat what is already written):\n' + fullText;
@@ -1841,7 +1846,6 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
     .then(function(data) {
       var raw = (data.result || '').trim();
       if (!raw || raw.length < 1) return;
-      // Strip any echoed input from the response
       var prediction = raw;
       if (midWord && prediction.toLowerCase().startsWith(inputText.toLowerCase())) {
         prediction = prediction.slice(inputText.length);
@@ -1849,7 +1853,6 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
         prediction = prediction.slice(inputText.length);
       }
       prediction = prediction.trim();
-      // Only show if prediction adds something meaningful
       var alreadyThere = ta.value.slice(ta.selectionStart).trimStart();
       if (prediction && prediction.length > 0 && !alreadyThere.startsWith(prediction.slice(0, Math.min(6, prediction.length)))) {
         showGhost(prediction);