Preserve device E2EE settings during remote rebuild

src/serviceFeatures/redFlag.unit.spec.ts

@@ -1149,6 +1149,33 @@ describe("Red Flag Feature", () => {
     });
 
     describe("Remote configuration adjustment", () => {
+        it("keeps this device's E2EE settings when preparing to overwrite the remote", async () => {
+            const host = createHostMock();
+            Object.assign(host.mocks.setting.settings, TweakValuesShouldMatchedTemplate, {
+                encrypt: true,
+                passphrase: "local-encryption-passphrase",
+            });
+            host.mocks.tweakValue.fetchRemotePreferred.mockResolvedValueOnce(
+                availableRemoteTweaks({
+                    ...TweakValuesShouldMatchedTemplate,
+                    encrypt: false,
+                })
+            );
+
+            const result = await adjustSettingToRemote(
+                host as any,
+                createLoggerMock(),
+                host.mocks.setting.currentSettings(),
+                "rebuild"
+            );
+
+            expect(result).toBe(true);
+            expect(host.mocks.tweakValue.fetchRemotePreferred).toHaveBeenCalledOnce();
+            expect(host.mocks.setting.currentSettings().encrypt).toBe(true);
+            expect(host.mocks.setting.currentSettings().passphrase).toBe("local-encryption-passphrase");
+            expect(host.mocks.setting.applyExternalSettings).not.toHaveBeenCalled();
+        });
+
         it("should skip remote configuration fetch when preventFetchingConfig is true", async () => {
             const host = createHostMock();
             const config = { preventFetchingConfig: true } as any;
@@ -1855,8 +1882,15 @@ describe("Red Flag Feature", () => {
         it("should handle rebuildAll flag with flagHandlerToEventHandler", async () => {
             const host = createHostMock();
             const log = createLoggerMock();
+            Object.assign(host.mocks.setting.settings, TweakValuesShouldMatchedTemplate, {
+                encrypt: true,
+                passphrase: "local-encryption-passphrase",
+            });
             host.mocks.tweakValue.fetchRemotePreferred.mockResolvedValueOnce(
-                availableRemoteTweaks({ customChunkSize: 1 })
+                availableRemoteTweaks({
+                    ...TweakValuesShouldMatchedTemplate,
+                    encrypt: false,
+                })
             );
 
             host.mocks.storageAccess.files.add(FlagFilesOriginal.REBUILD_ALL);
@@ -1868,6 +1902,8 @@ describe("Red Flag Feature", () => {
             await Promise.resolve(eventHandler());
             await new Promise((resolve) => setTimeout(resolve, 10));
             expect(host.mocks.rebuilder.$rebuildEverything).toHaveBeenCalled();
+            expect(host.mocks.setting.currentSettings().encrypt).toBe(true);
+            expect(host.mocks.setting.applyExternalSettings).not.toHaveBeenCalled();
 
             expect(host.mocks.ui.dialogManager.openWithExplicitCancel).toHaveBeenCalled();
         });