chore: update all packages to latest versions

- aionui 2.1.4 -> 2.1.50
- desloppify 0.9.15 -> 1.0
- ds4 -> 2026-08-05 (b030961)
- freebuff 0.0.85 -> 0.0.142 (binary moved to GitHub releases)
- graphify 0.7.10 -> 0.9.35 (license Apache-2.0, fix sed patterns for versioned deps)
- hipengine 0.2.2 -> 0.3.0 (console script renamed to hipengine)
- kubernetes-mcp-server 0.0.62 -> 0.0.66 (requires go >= 1.26.3)
- mcp-gateway 2.11.0 -> 3.4.0 (requires rustc >= 1.95)
- omniroute 3.8.28 -> 3.8.49
- radar 1.6.1 -> 1.9.1 (drop obsolete lockfile sed patch)
- relay-free-llm -> 96e6c48, cerebras-cloud-sdk 1.67.0 -> 1.91.0
- stakpak 0.3.86 -> 0.3.88

Add nixpkgs-latest input for toolchains newer than the pinned nixpkgs.

packages/aionui/package.nix

@@ -15,13 +15,13 @@
 }:
 
 let
-  version = "2.1.4";
+  version = "2.1.50";
 
   src = fetchFromGitHub {
     owner = "iOfficeAI";
     repo = "AionUi";
     rev = "v${version}";
-    hash = "sha256-A7dKGEuo5n+M7D9fJR3TN95q1P7En/ulsTO+ev6SAUY=";
+    hash = "sha256-NsKygGMRN5pQXyKaehVW/sC2tyd4KmrYmiQrr5ZGeNY=";
   };
 
   # FOD 1: All dependencies (dev + prod) for the build phase.
@@ -34,7 +34,7 @@ let
     ];
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
-    outputHash = "sha256-Fuj55vxDgpx5A4iwnU/5IZKPfaYMH3DeZ1yauuZHn8g=";
+    outputHash = "sha256-EeDapBXeiU/70N92ka1dmrKUMEDN65FON8VPVPsBfro=";
     dontPatchShebangs = true;
     dontFixup = true;
     SSL_CERT_FILE = "${cacert}/etc/ssl/certs/ca-bundle.crt";
@@ -63,7 +63,7 @@ let
     ];
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
-    outputHash = "sha256-eCQ9ObhttZ10CehRRvl4IaOKkdK9m1TQJuhLmhiMkBY=";
+    outputHash = "sha256-L2UV+OsHfoQTsc1s+tBrJZtnoiCcB2mlnsAHbplTggc=";
     dontPatchShebangs = true;
     dontFixup = true;
     SSL_CERT_FILE = "${cacert}/etc/ssl/certs/ca-bundle.crt";