feat: Working sync between Navidrome & iPod

First full session of vibecoding with agents, super cool!

Signed-off-by: SindreKjelsrud <sindre@kjelsrud.dev>

shell.nix

@@ -0,0 +1,56 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-25.05";
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    rustc
+    cargo
+    gcc # cc-command for building native dependencies
+    pkg-config # useful for C-dependencies
+    openssl # if crates are dependent on openssl
+    openssl.dev # openssl development headers
+    # GUI dependencies - X11
+    libGL
+    xorg.libX11
+    xorg.libXcursor
+    xorg.libXi
+    xorg.libXrandr
+    libxkbcommon
+    # GUI dependencies - Wayland (for Wayland support)
+    wayland
+  ];
+
+  # Set up library paths for runtime
+  shellHook = let
+    libPath = pkgs.lib.makeLibraryPath (with pkgs; [
+      libGL
+      xorg.libX11
+      xorg.libXcursor
+      xorg.libXi
+      xorg.libXrandr
+      libxkbcommon
+      wayland
+    ]);
+  in ''
+    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${libPath}"
+    
+    echo "NaviPod Development Environment"
+
+    # Verify Rust is available
+    if command -v rustc &> /dev/null; then
+      echo "✓ Rust $(rustc --version) is available"
+    fi
+
+    if command -v cargo &> /dev/null; then
+      echo "✓ Cargo $(cargo --version) is available"
+    fi
+
+    echo ""
+    echo "Welcome to NaviPod development shell!"
+    echo "Run 'cargo build' to build the project."
+    echo "Run 'cargo check' to check for compilation errors."
+    echo "Run './target/debug/navipod-gui' to launch the GUI (from within this shell)."
+  '';
+}