feat: feedback visuel immédiat après drag-and-drop + correction résolution IDs labels

- /api/move retourne maintenant les labels mis à jour
- Le frontend met à jour les labels de la carte sans recharger la page
- Flash vert sur la carte pour confirmer le succès du déplacement
- Correction: résolution noms→IDs des labels via l'API Gitea (update_issue_labels attend des ints)
- Mise à jour de data-column sur la carte déplacée

app/routers/api.py

@@ -139,6 +139,7 @@ async def move_card(
 
         conn.commit()
 
+    labels = []
     if mapping:
         try:
             if mapping["close_issue"]:
@@ -147,13 +148,20 @@ async def move_card(
                 issue = await gitea.get_issue(owner, repo, issue_id)
                 current_labels = [lbl["name"] for lbl in issue.get("labels", [])]
                 status_labels = await _get_status_labels(owner, repo, board_id)
-                filtered = [l for l in current_labels if l not in status_labels]
-                filtered.append(mapping["gitea_label"])
-                await gitea.update_issue_labels(owner, repo, issue_id, filtered)
+                filtered_names = [l for l in current_labels if l not in status_labels]
+                filtered_names.append(mapping["gitea_label"])
+
+                # Resolve label names to IDs
+                all_labels = await gitea.get_labels(owner, repo)
+                name_to_id = {lbl["name"]: lbl["id"] for lbl in all_labels}
+                label_ids = [name_to_id[n] for n in filtered_names if n in name_to_id]
+
+                result = await gitea.update_issue_labels(owner, repo, issue_id, label_ids)
+                labels = [{"name": lbl["name"], "color": lbl.get("color", "666")} for lbl in result]
         except Exception as e:
             logger.warning("Gitea sync failed: %s", e)
 
-    return {"status": "ok", "issue_id": issue_id, "column": column}
+    return {"status": "ok", "issue_id": issue_id, "column": column, "labels": labels}
 
 
 async def _get_status_labels(owner: str, repo: str, board_id: int) -> list[str]:

app/templates/board.html

@@ -237,6 +237,25 @@
               method: 'POST', headers: {'X-CSRF-Token': getCSRFToken()}
             });
             if (!resp.ok) throw new Error('Move failed');
+            const data = await resp.json();
+
+            // Update card's data-column
+            card.dataset.column = newCol;
+
+            // Update labels on the moved card
+            const labelsDiv = card.querySelector('.card-labels');
+            if (labelsDiv && data.labels) {
+              labelsDiv.innerHTML = data.labels.map(l =>
+                `<span class="card-label" style="background:#${l.color||'666'}33;color:#${l.color||'ccc'}">${escHtml(l.name)}</span>`
+              ).join('');
+            }
+
+            // Flash feedback
+            card.style.transition = 'box-shadow 0.3s';
+            card.style.boxShadow = '0 0 0 2px var(--green)';
+            setTimeout(() => { card.style.boxShadow = ''; }, 800);
+
+            // Update column counts
             document.querySelectorAll('.board-column').forEach(col => {
               const c = col.querySelectorAll('.card').length;
               const b = col.querySelector('.column-count');