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/omniroute/package.nix

@@ -8,10 +8,10 @@
 }:
 
 let
-  version = "3.8.28";
+  version = "3.8.49";
   npmTarball = fetchurl {
     url = "https://registry.npmjs.org/omniroute/-/omniroute-${version}.tgz";
-    hash = "sha256-/le4p5DSX5T7/srNuxVBLepzUPw8BgIVio+h0JnbfyY=";
+    hash = "sha256-fcGsAxOdv1ZSwt24eHJu97lyRATKBw8rYeFvGTRhxYs=";
   };
 in
 
@@ -23,12 +23,12 @@ buildNpmPackage (finalAttrs: {
     owner = "diegosouzapw";
     repo = "OmniRoute";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-BRvpbhhLTYj2rKw+nZloaXkpu3ySs5sWZo9425xvAPs=";
+    hash = "sha256-nRLziV4NWPoa0ev57DV7jmAvLpL/1MP1EMZO2/drrTU=";
   };
 
   nodejs = nodejs_22;
 
-  npmDepsHash = "sha256-Q1KLR3NkeFBB+tQzBazy+XWyIfpG8Magv+rdeqISNxw=";
+  npmDepsHash = "sha256-R0u93MLUUWC8xFgq4S0Aj/7wg4pygTKwxP/eWkWMgCw=";
 
   # Skip Next.js build (requires network for Google Fonts).
   # Pre-built dist/ is copied from the npm tarball in preConfigure.