Restore macOS direct LAN connections (#3071)

* fix(desktop): restore direct LAN connections

Desktop 0.3.0 routed remote WebSockets through the Electron main process, causing previously working macOS LAN connections to fail with EHOSTUNREACH. Revert custom direct headers and restore the renderer WebSocket path used before the regression.

* fix(app): replace host connections by identity

Keep one connection per stable ID when TLS or password settings change. This preserves the current-main upsert invariant while the custom-header rollback removes the unrelated transport feature.

packages/app/e2e/browser/settings-navigation.spec.ts

@@ -114,16 +114,6 @@ test.describe("Settings sidebar navigation", () => {
     await expectDirectHostUriHidden(page);
   });
 
-  test("browser web hides direct connection custom headers", async ({ page }) => {
-    await gotoAppShell(page);
-    await openSettings(page);
-    await openAddHostFlow(page);
-    await selectHostConnectionType(page, "direct");
-    await toggleHostAdvanced(page);
-
-    await expect(page.getByTestId("direct-header-add")).toHaveCount(0);
-  });
-
   test("sidebar shows a Back to workspace row that leaves /settings", async ({ page }) => {
     await gotoAppShell(page);
     await openSettings(page);

packages/app/e2e/support/helpers/pair-device.ts

@@ -17,6 +17,49 @@ interface PairingHostInput {
   endpoint: string;
 }
 
+export async function prepareLocalPairingHost(
+  page: Page,
+  daemon: IsolatedHostDaemon | OutdatedDaemon,
+  additionalHosts: PairingHostInput[] = [],
+): Promise<void> {
+  await page.addInitScript((localServerId) => {
+    (window as unknown as { paseoDesktop: unknown }).paseoDesktop = {
+      platform: "darwin",
+      invoke: async (command: string) => {
+        if (command === "desktop_daemon_status") {
+          return {
+            serverId: localServerId,
+            status: "running",
+            listen: null,
+            hostname: null,
+            pid: null,
+            home: "",
+            version: null,
+            desktopManaged: true,
+            error: null,
+          };
+        }
+        if (command === "get_desktop_settings") {
+          return {
+            releaseChannel: "stable",
+            daemon: { manageBuiltInDaemon: false, keepRunningAfterQuit: true },
+          };
+        }
+        return null;
+      },
+      getPendingOpenProject: async () => null,
+      events: { on: async () => () => undefined },
+      opener: {
+        openUrl: async (url: string) => {
+          localStorage.setItem("@paseo:e2e-opened-url", url);
+        },
+      },
+    };
+  }, daemon.serverId);
+
+  await preparePairingHost(page, daemon, additionalHosts);
+}
+
 export async function preparePairingHost(
   page: Page,
   daemon: IsolatedHostDaemon | OutdatedDaemon,