chore: update flake inputs and adjust configs

- Update flake inputs (home-manager, HyprPanel, nixpkgs variants, NUR, AGENTS)
- Switch OpenCode agents to opencode/ model provider
- Remove webcord package from media config
- Fix thunar plugins namespace (xfce.* → pkgs.*)
- Upgrade m3-kratos kernel to 6.18
- Disable ADB and qdrant service on m3-kratos
- Enable qdrant overlay using stable nixpkgs

overlays/default.nix

@@ -7,24 +7,24 @@
   # This one contains whatever you want to overlay
   # You can change versions, add patches, set compilation flags, anything really.
   # https://nixos.wiki/wiki/Overlays
+  modifications = final: prev: {
+    qdrant = inputs.nixpkgs-stable.legacyPackages.${prev.system}.qdrant;
+    #   n8n = import ./mods/n8n.nix {inherit prev;};
 
-  # modifications = final: prev: {
-  #   n8n = import ./mods/n8n.nix {inherit prev;};
+    #   brave = prev.brave.override {
+    #     commandLineArgs = "--password-store=gnome-libsecret";
+    #   };
 
-  #   brave = prev.brave.override {
-  #     commandLineArgs = "--password-store=gnome-libsecret";
-  #   };
-
-  # hyprpanel = inputs.hyprpanel.packages.${prev.system}.default.overrideAttrs (prev: {
-  #   version = "latest"; # or whatever version you want
-  #   src = final.fetchFromGitHub {
-  #     owner = "Jas-SinghFSU";
-  #     repo = "HyprPanel";
-  #     rev = "master"; # or a specific commit hash
-  #     hash = "sha256-l623fIVhVCU/ylbBmohAtQNbK0YrWlEny0sC/vBJ+dU=";
-  #   };
-  # });
-  # };
+    # hyprpanel = inputs.hyprpanel.packages.${prev.system}.default.overrideAttrs (prev: {
+    #   version = "latest"; # or whatever version you want
+    #   src = final.fetchFromGitHub {
+    #     owner = "Jas-SinghFSU";
+    #     repo = "HyprPanel";
+    #     rev = "master"; # or a specific commit hash
+    #     hash = "sha256-l623fIVhVCU/ylbBmohAtQNbK0YrWlEny0sC/vBJ+dU=";
+    #   };
+    # });
+  };
 
   temp-packages = final: _prev: {
     temp = import inputs.nixpkgs-9e9486b {