feat(sync): refonte import Takeout complet (playlists, musique, recherches, identité)

server/db.mjs

@@ -409,6 +409,17 @@ export function insertSearchHistory({ userId, query, filters }) {
   return { id, created_at };
 }
 
+/** Variante Takeout : date d'origine conservée (ISO valide exigée). */
+export function insertSearchHistoryAt({ userId, query, createdAt }) {
+  const id = cryptoRandomId();
+  const d = new Date(String(createdAt || ''));
+  const created_at = !Number.isNaN(d.getTime()) ? d.toISOString() : nowIso();
+  db.prepare(`INSERT INTO search_history (id, user_id, query, filters_json, created_at)
+              VALUES (?, ?, ?, ?, ?)`)
+    .run(id, userId, query, null, created_at);
+  return { id, created_at };
+}
+
 export function listSearchHistory({ userId, limit = 50, before, q, provider }) {
   const lim = Math.max(1, Math.min(200, Number(limit) || 50));
   const conds = ['user_id = ?'];

server/index.mjs

@@ -40,6 +40,7 @@ import {
   cryptoRandomId,
   cryptoRandomUUID,
   insertSearchHistory,
+  insertSearchHistoryAt,
   listSearchHistory,
   deleteSearchHistoryById,
   deleteAllSearchHistory,
@@ -2550,6 +2551,28 @@ r.post('/user/history/search', authMiddleware, (req, res) => {
   return res.status(201).json(row);
 });
 
+// Import en lot des recherches Takeout (historique-recherches.html).
+r.post('/user/history/search/batch', authMiddleware, oauthLimiter, (req, res) => {
+  try {
+    const items = Array.isArray(req.body?.items) ? req.body.items : [];
+    if (!items.length) return res.status(400).json({ error: 'items_required' });
+    if (items.length > 1000) return res.status(400).json({ error: 'batch_too_large' });
+    let imported = 0;
+    let skipped = 0;
+    for (const it of items) {
+      const query = String(it?.query || '').trim().slice(0, 300);
+      if (!query) { skipped++; continue; }
+      try {
+        insertSearchHistoryAt({ userId: req.user.id, query, createdAt: it?.createdAt });
+        imported++;
+      } catch { skipped++; }
+    }
+    return res.json({ imported, skipped, total: items.length });
+  } catch {
+    return res.status(500).json({ error: 'search_batch_failed' });
+  }
+});
+
 r.get('/user/history/search', authMiddleware, (req, res) => {
   const limit = Math.min(200, Number(req.query.limit || 50));
   const before = req.query.before ? String(req.query.before) : undefined;