Add a native Nodes switcher and keep the launch screen gated through session handoff

Hop-State: A_06FPGHN5480G5QDY6X262B0
Hop-Proposal: R_06FPGHM5F6DNCB08QXQS5ER
Hop-Task: T_06FPGDYGAF0D1M389636J4G
Hop-Attempt: AT_06FPGDYGAF0KT0QDZXYQS1R

src-tauri/Cargo.toml

@@ -24,5 +24,23 @@ serde_json = "1"
 reqwest = { version = "0.12", features = ["cookies", "json", "rustls-tls"] }
 tauri-plugin-notification = "2"
 
+[target.'cfg(target_os = "macos")'.dependencies]
+objc2 = "0.6"
+objc2-app-kit = { version = "0.3", features = [
+  "NSButton",
+  "NSCell",
+  "NSControl",
+  "NSLayoutConstraint",
+  "NSMenu",
+  "NSMenuItem",
+  "NSPopUpButton",
+  "NSResponder",
+  "NSTitlebarAccessoryViewController",
+  "NSView",
+  "NSViewController",
+  "NSWindow",
+] }
+objc2-foundation = { version = "0.3", features = ["NSArray", "NSString"] }
+
 [dev-dependencies]
 http = "1"