fix: resolve protobuf ABI conflict in Nix build

Override sentencepiece to use system protobuf instead of embedded version,
preventing segmentation fault when both sentencepiece and onnxruntime are
linked with different protobuf versions. Also improves library path wrapping
for runtime dependencies.

Author: 0xPD33

flake.nix

@@ -101,6 +101,16 @@
 
         packages = let
           cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
+
+          # Override sentencepiece to use the same protobuf as onnxruntime
+          # to avoid ABI conflicts
+          sentencepieceFixed = pkgs.sentencepiece.overrideAttrs (old: {
+            buildInputs = (old.buildInputs or []) ++ [ pkgs.protobuf ];
+            cmakeFlags = (old.cmakeFlags or []) ++ [
+              "-DSPM_USE_BUILTIN_PROTOBUF=OFF"
+            ];
+          });
+
           sonoriPkg = pkgs.rustPlatform.buildRustPackage rec {
             pname = "sonori";
             version = cargoToml.package.version;
@@ -123,6 +133,7 @@
               vulkan-headers
               shaderc
               git
+              makeWrapper  # For wrapping binary with library paths
             ];
 
             buildInputs = with pkgs; [
@@ -142,16 +153,16 @@
               fftw
               curl
               ctranslate2
-              sentencepiece
               wtype
               vulkan-loader
               vulkan-headers
               openblas
               openblas.dev
               onnxruntime
-            ];
+              protobuf  # Ensure consistent protobuf version
+            ] ++ [ sentencepieceFixed ];  # Use our fixed sentencepiece
 
-            # Environment variable to point ort-sys to system ONNX Runtime
+            # Use system ONNX Runtime for Silero VAD
             ORT_STRATEGY = "system";
 
             LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
@@ -162,6 +173,22 @@
             doCheck = false;
 
             postInstall = ''
+              # Wrap binary with required library paths
+              wrapProgram $out/bin/sonori \
+                --prefix LD_LIBRARY_PATH : ${pkgs.lib.makeLibraryPath [
+                  pkgs.libxkbcommon
+                  pkgs.wayland
+                  pkgs.xorg.libX11
+                  pkgs.xorg.libXcursor
+                  pkgs.xorg.libXi
+                  pkgs.xorg.libXrandr
+                  pkgs.vulkan-loader
+                  pkgs.openblas
+                  pkgs.onnxruntime
+                  pkgs.alsa-lib
+                  pkgs.portaudio
+                ]}
+
               # Install desktop file
               mkdir -p $out/share/applications
               install -m 644 ${./desktop/sonori.desktop} $out/share/applications/