Enormous refactor adding IndexedDB space and syncing.

server/api_server.ts

@@ -68,6 +68,7 @@ export class ExpressServer {
 
     // Page list
     fsRouter.route("/").get(async (req, res) => {
+      res.header("Now-Timestamp", "" + Date.now());
       res.json(await this.storage.listPages());
     });
 

server/disk_storage.ts

@@ -141,7 +141,7 @@ export class DiskStorage implements Storage {
       if (lastModified) {
         let d = new Date(lastModified);
         console.log("Going to set the modified time", d);
-        await utimes(localPath, lastModified, lastModified);
+        await utimes(localPath, d, d);
       }
       // Fetch new metadata
       const s = await stat(localPath);