Add native self-hosted instance connection to fluxer_desktop

Trimmed monorepo checkout (fluxer_desktop + packages/voice_engine_v2 +
tools/ci) with a "Connect to a Different Server" menu item and popout
that lets the desktop app switch to any self-hosted Fluxer instance,
plus fixes for well-known discovery on single-domain self-hosted
deployments and a false-positive ERR_ABORTED on same-origin client
redirects during the switch. Defaults to chat.fluxr.chat and uses an
isolated userData directory from the official build.

fluxer_desktop/native/mac-app-audio/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "fluxer_mac_app_audio"
+version = "0.0.0"
+edition = "2024"
+license = "AGPL-3.0-or-later"
+publish = false
+
+[workspace]
+resolver = "2"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+napi = {version = "3.9.1", default-features = false, features = ["dyn-symbols", "napi8", "async"]}
+napi-derive = "3.5.6"
+parking_lot = "0.12"
+
+[target.'cfg(target_os = "macos")'.dependencies.fluxer_screen_frame_bus]
+path = "../screen-frame-bus"
+
+[target.'cfg(target_os = "macos")'.dependencies]
+libc = "0.2.186"
+objc2 = "0.6"
+objc2-foundation = {version = "0.3", features = ["NSString", "NSArray", "NSDictionary", "NSError", "NSValue", "NSBundle", "NSProcessInfo"]}
+objc2-screen-capture-kit = {version = "0.3", features = ["SCStream", "SCShareableContent", "objc2-core-graphics", "objc2-core-media", "objc2-core-foundation", "block2", "dispatch2", "libc"]}
+objc2-core-audio = {version = "0.3", features = ["AudioHardware", "AudioHardwareDeprecated", "HostTime", "objc2-core-audio-types", "objc2-foundation"]}
+objc2-core-audio-types = "0.3"
+objc2-core-media = "0.3"
+objc2-core-foundation = {version = "0.3", features = ["CFArray", "CFDictionary", "CFNumber", "CFString", "CFBase"]}
+objc2-core-graphics = {version = "0.3.2", default-features = false, features = ["std", "CGWindow"]}
+block2 = "0.6"
+dispatch2 = "0.3"
+
+[build-dependencies]
+napi-build = "2.3.2"