Merge branch 'main' into feat/20260226-photo-capture

Resolved conflicts:
- flake.nix: Combined flake-parts + sd-card + OCI image
- flake.lock: Updated to include flake-parts input

flake.nix

@@ -169,7 +169,8 @@
         };
 
         devShells.default = pkgs.mkShell {
-          packages = sd-card.packages.${system}.tools  # tea, jq, nodejs, playwright
+          packages =
+            sd-card.packages.${system}.tools # tea, jq, nodejs, playwright
             ++ (with pkgs; [
               nodejs
               nodePackages.npm