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/webrtc-sender/vendor/tract-linalg-0.23.1/Cargo.toml.orig

@@ -0,0 +1,169 @@
+[package]
+name = "tract-linalg"
+version = "0.23.1"
+license = "MIT OR Apache-2.0"
+authors = ["Mathieu Poumeyrol <kali@zoy.org>"]
+description = "Tiny, no-nonsense, self contained, TensorFlow and ONNX inference"
+repository = "https://github.com/snipsco/tract"
+keywords = ["TensorFlow", "NeuralNetworks"]
+categories = ["science"]
+autobenches = false
+edition = "2024"
+
+[badges]
+maintenance = { status = "actively-developed" }
+
+[dependencies]
+byteorder.workspace = true
+derive-new.workspace = true
+downcast-rs.workspace = true
+dyn-clone.workspace = true
+dyn-eq.workspace = true
+dyn-hash.workspace = true
+lazy_static.workspace = true
+log.workspace = true
+num-traits.workspace = true
+pastey.workspace = true
+rayon = { workspace = true, optional = true }
+scan_fmt.workspace = true
+tract-data.workspace = true
+
+[build-dependencies]
+cc.workspace = true
+half.workspace = true
+minijinja.workspace = true
+walkdir.workspace = true
+
+[dev-dependencies]
+env_logger.workspace = true
+libc.workspace = true
+nu-ansi-term.workspace = true
+core_affinity.workspace = true
+
+[target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
+criterion.workspace = true
+proptest.workspace = true
+
+[target.'cfg(target_family = "wasm")'.dev-dependencies]
+# Wasm doesn't support the `rayon` feature of criterion
+criterion = { version = "0.8", default-features = false, features = ["plotters", "cargo_bench_support"] }
+# Wasm doesn't support the `fork` feature of proptest.
+proptest = { version = "1.0.0", default-features = false, features = ["std", "bit-set"] }
+
+[features]
+# This feature is meant to accomodate very restrictive / legacy toolchains that do
+# have support for fp16 instructions, breaking tract compilation.
+# It is not meant to be used in other situations, where run-time detection is
+# preferred.
+no_fp16 = []
+apple-amx-ios = []
+default = [ ]
+multithread-mm = [ "rayon" ]
+complex = [ "tract-data/complex" ]
+hwbench = [ "rayon" ]
+
+[[bench]]
+bench = false
+name = "arm64"
+harness = false
+
+[[bench]]
+name = "mat_vec"
+harness = false
+
+[[bench]]
+name = "mm_for_wavenet_hw"
+harness = false
+
+[[bench]]
+name = "mm_for_inception"
+harness = false
+
+[[bench]]
+name = "mm_for_asr_am"
+harness = false
+
+[[bench]]
+name = "qmmm_i8"
+harness = false
+
+[[bench]]
+name = "hardswish"
+harness = false
+
+[[bench]]
+name = "silu"
+harness = false
+
+[[bench]]
+name = "gelu"
+harness = false
+
+[[bench]]
+name = "sigmoid"
+harness = false
+
+[[bench]]
+name = "softmax"
+harness = false
+
+[[bench]]
+name = "activations_avx512_f16"
+harness = false
+
+[[bench]]
+name = "erf"
+harness = false
+
+[[bench]]
+name = "rms_norm"
+harness = false
+
+[[bench]]
+name = "activations_avx512_fp16"
+harness = false
+
+[[bench]]
+bench = false
+name = "arm64simd"
+harness = false
+
+[[bench]]
+bench = false
+name = "arm32neon"
+harness = false
+
+[[bench]]
+name = "virtual_im2col"
+harness = false
+
+[[bench]]
+bench = false
+name = "x86_64"
+harness = false
+
+[[bench]]
+bench = false
+name = "intel"
+harness = false
+
+[[bench]]
+bench = false
+name = "leaky_relu"
+harness = false
+
+[[bench]]
+name = "avx512_zombies"
+harness = false
+
+[[bench]]
+name = "activations_avx512"
+harness = false
+
+[[bench]]
+name = "wasm"
+harness = false
+
+[[bench]]
+name = "vnni_i32"
+harness = false