Option Completion Missing Inside `attrsOf submodule` Body

## Summary `nixd` knows the options for an `attrsOf submodule` value and completes them after a dotted attr path, but does not offer the same completions inside the equivalent attrset body. This is reproducible with built-in NixOS options such as `users.users.<name>`. ## Expected Behavior In this NixOS config: ```nix { users.users.alice = { # cursor here }; } ``` Triggering completion inside `alice = { ... };` should offer the user submodule options, for example: ```text isNormalUser isSystemUser home description extraGroups shell packages openssh ``` Those options are available when completing after the equivalent dotted attr path: ```nix users.users.alice. # or users.users = { alice. }; ``` ## Actual Behavior Inside the attrset body, completion does not show the relevant submodule options. After the equivalent dotted attr path, completion does show them. So the option information appears to be available, but not applied at the nested attrset body cursor position. ## Reproduction `flake.nix`: ```nix { description = "nixd attrsOf submodule completion reproduction"; inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11"; }; outputs = { nixpkgs, ... }: { nixosConfigurations.control = nixpkgs.lib.nixosSystem { system = "x86_64-linux"; modules = [ ./configuration.nix ]; }; }; } ``` `configuration.nix`: ```nix { ... }: { users.users.alice = { # Trigger completion here }; } ``` VS Code / Cursor `nixd` config: ```json { "nix.enableLanguageServer": true, "nix.serverPath": [ "nixd", "--nixos-options-expr", "(builtins.getFlake \"path:/absolute/path/to/repro\").nixosConfigurations.control.options" ] } ``` ## Option Tree Verification The evaluated option tree contains the expected submodule fields: ```bash nix eval --json --impure --expr ' builtins.attrNames ( (builtins.getFlake "path:/absolute/path/to/repro") .nixosConfigurations.control.options.users.users.type.nestedTypes.elemType .getSubOptions [ "users" "users" "alice" ] ) ' ``` Returns options including: ```text createHome description enable extraGroups group home isNormalUser isSystemUser openssh packages shell uid ``` This matches the options shown after completing `users.users.alice.`. ## Environment - `nixd` version: `2.6.4` - Editor: VS Code / Cursor with `jnoortheen.nix-ide` - `nixpkgs`: `nixos-25.11`