feat: rebuild desktop sync as linked server accounts, fix packaged plugin bundles and UI scaling

electron/desktop-settings.cjs

@@ -0,0 +1,80 @@
+// Desktop-only settings kept next to the app's data, and the server address
+// older versions saved, so linking can offer it again.
+
+const { app } = require("electron");
+const fs = require("fs");
+const path = require("path");
+
+function dataPath(filename) {
+  return path.join(app.getPath("userData"), filename);
+}
+
+function readJson(filePath, fallback) {
+  try {
+    if (!fs.existsSync(filePath)) return fallback;
+    return JSON.parse(fs.readFileSync(filePath, "utf8"));
+  } catch {
+    return fallback;
+  }
+}
+
+function writeJson(filePath, value) {
+  fs.mkdirSync(path.dirname(filePath), { recursive: true });
+  const temporaryPath = `${filePath}.${process.pid}-${Date.now()}.tmp`;
+  try {
+    fs.writeFileSync(temporaryPath, JSON.stringify(value, null, 2), {
+      mode: 0o600,
+    });
+    fs.renameSync(temporaryPath, filePath);
+  } catch (error) {
+    fs.rmSync(temporaryPath, { force: true });
+    throw error;
+  }
+}
+
+const DEFAULTS = { defaultConnectionOrigin: "local" };
+
+function getDesktopSettings() {
+  return { ...DEFAULTS, ...readJson(dataPath("desktop-settings.json"), {}) };
+}
+
+function saveDesktopSettings(settings) {
+  writeJson(dataPath("desktop-settings.json"), {
+    ...getDesktopSettings(),
+    ...settings,
+  });
+  return { success: true };
+}
+
+// The server a 2.8 or older desktop was pointed at, if any.
+function getPreviousServerUrl() {
+  for (const file of ["remote-sync-config.json", "server-config.json"]) {
+    const config = readJson(dataPath(file), null);
+    if (config && typeof config.serverUrl === "string" && config.serverUrl) {
+      return config.serverUrl;
+    }
+  }
+  return null;
+}
+
+// The old sync engine's session and cursors are useless to the new one,
+// and the session is a credential, so they go.
+function removeOldSyncFiles() {
+  for (const file of [
+    "remote-sync-credential.json",
+    "remote-sync-state.json",
+  ]) {
+    try {
+      fs.rmSync(dataPath(file), { force: true });
+    } catch {
+      // Best effort.
+    }
+  }
+}
+
+module.exports = {
+  getDesktopSettings,
+  saveDesktopSettings,
+  getPreviousServerUrl,
+  removeOldSyncFiles,
+};