Store Assistent chats, UI state, and taste in sqlite.

Runtime session data belongs in one DB so History can FTS-search and follow the volume; persona overlays and sidecar cards stay files.

Co-authored-by: Cursor <cursoragent@cursor.com>

Assets/assistent.js

@@ -4047,7 +4047,7 @@
     }
 
     /**
-     * Fills fields the browser has never seen from Assistent/ui-state.json, so a fresh
+     * Fills fields the browser has never seen from sqlite ui_state, so a fresh
      * browser on the same volume inherits the previous session. Existing localStorage wins.
      * auto_download is only ever restored when it is off — the danger flag stays opt-in.
      */
@@ -5361,7 +5361,7 @@
                 }
                 const remoteUpdated = remote.updated || 0;
                 const localUpdated = state.taste?.updated || 0;
-                // Disk taste.json is the source of truth; localStorage only wins when it is strictly newer.
+                // sqlite taste is the source of truth; localStorage only wins when it is strictly newer.
                 const localEmpty = !localUpdated
                     && !(state.taste?.styles?.length || state.taste?.likes?.length || state.taste?.avoid?.length);
                 if (localEmpty || remoteUpdated >= localUpdated) {