Update server.js

server.js

@@ -160,7 +160,13 @@ function runMigrations() {
         console.log('🔧 Migration: CREATE TABLE share_links'); 
         db.exec(`CREATE TABLE share_links (token TEXT PRIMARY KEY, file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, type TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), expires_at INTEGER);`); 
     }
-    if (!tables.includes('sessions')) { 
+
+    // --- CORRECTION TABLE SESSIONS ---
+    const sessionsCols = tables.includes('sessions') ? db.prepare("PRAGMA table_info(sessions)").all().map(c => c.name) : [];
+    if (tables.includes('sessions') && (!sessionsCols.includes('data') || !sessionsCols.includes('expires_at'))) {
+        console.log('🔧 Migration: Reconstruction table sessions (colonnes manquantes)');
+        db.exec(`DROP TABLE sessions; CREATE TABLE sessions (sid TEXT PRIMARY KEY, data TEXT NOT NULL, expires_at INTEGER NOT NULL); CREATE INDEX idx_sessions_expires ON sessions(expires_at);`);
+    } else if (!tables.includes('sessions')) {
         console.log('🔧 Migration: CREATE TABLE sessions'); 
         db.exec(`CREATE TABLE sessions (sid TEXT PRIMARY KEY, data TEXT NOT NULL, expires_at INTEGER NOT NULL); CREATE INDEX idx_sessions_expires ON sessions(expires_at);`); 
     }