Added Record screen, transcribe, mobile screen share bug fix.

server/db.js

@@ -77,4 +77,8 @@ CREATE TABLE IF NOT EXISTS sessions_log (
 );
 `);
 
+// Migration: stored recording filename for a session (null if not recorded)
+try { db.exec('ALTER TABLE sessions_log ADD COLUMN recording TEXT'); } catch (e) { /* exists */ }
+try { db.exec('ALTER TABLE sessions_log ADD COLUMN transcript TEXT'); } catch (e) { /* exists */ }
+
 module.exports = db;