docs(plan): pin home-manager to release-26.05 and drop redundant niri keybinds

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018Sv2QAunLcLo3tS1YsfLgN

docs/superpowers/plans/2026-07-24-dank-material-shell.md

@@ -35,7 +35,7 @@ In `flake.nix`, inside the `inputs = { ... }` block, after the `nixos-generators
 
 ```nix
     home-manager = {
-      url = "github:nix-community/home-manager";
+      url = "github:nix-community/home-manager/release-26.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     niri.url = "github:sodiboo/niri-flake";
@@ -181,7 +181,7 @@ in
       quickshell.package = pkgs.unstable.quickshell;
     };
 
-    # Home side: DMS shell + niri keybinds/spawn for finn.
+    # Home side: DMS shell + niri spawn for finn (keybinds come via includes).
     home-manager.users.finn = {
       imports = [
         inputs.niri.homeModules.niri
@@ -193,7 +193,9 @@ in
         enable = true;
         systemd.enable = true;
         quickshell.package = pkgs.unstable.quickshell;
-        niri.enableKeybinds = true;
+        # niri.enableKeybinds intentionally omitted: DMS's niri `includes.enable`
+        # (default true) already brings in the generated binds.kdl plus theming;
+        # setting enableKeybinds too triggers an upstream "not recommended" warning.
         niri.enableSpawn = true;
       };