fix(app): split connectivity into internet/core/backend channels (#1527) (#1727)

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: Steven Enamakel <enamakel@tinyhumans.ai>

app/src/services/coreProcessControl.ts

@@ -0,0 +1,18 @@
+/**
+ * Thin wrapper around the Tauri `restart_core_process` IPC command.
+ *
+ * Surfaced via the Home blocking screen's "Restart Core" button (#1527) so
+ * the user has a one-click recovery when the local sidecar has crashed or
+ * is stuck. Outside Tauri (web preview / Vitest harness) this is a no-op
+ * that returns a friendly error string.
+ */
+import { invoke } from '@tauri-apps/api/core';
+
+import { isTauri } from '../utils/tauriCommands/common';
+
+export async function restartCoreProcess(): Promise<void> {
+  if (!isTauri()) {
+    throw new Error('Restart Core is only available in the desktop app.');
+  }
+  await invoke('restart_core_process');
+}